/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:14:51,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:14:51,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:14:51,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:14:51,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:14:51,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:14:51,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:14:51,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:14:51,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:14:51,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:14:51,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:14:51,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:14:51,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:14:51,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:14:51,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:14:51,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:14:51,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:14:51,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:14:51,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:14:51,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:14:51,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:14:51,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:14:51,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:14:51,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:14:51,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:14:51,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:14:51,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:14:51,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:14:51,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:14:51,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:14:51,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:14:51,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:14:51,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:14:51,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:14:51,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:14:51,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:14:51,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:14:51,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:14:51,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:14:51,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:14:51,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:14:51,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:14:51,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:14:51,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:14:51,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:51,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:14:51,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:14:51,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:14:51,966 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:14:51,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:14:52,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:14:52,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:14:52,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:14:52,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:14:52,193 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:14:52,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-02-24 04:14:52,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc375d97/68166be9f2f941e9adf3491dc5edbe2c/FLAG470f5ddd5 [2022-02-24 04:14:52,638 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:14:52,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-02-24 04:14:52,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc375d97/68166be9f2f941e9adf3491dc5edbe2c/FLAG470f5ddd5 [2022-02-24 04:14:52,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbc375d97/68166be9f2f941e9adf3491dc5edbe2c [2022-02-24 04:14:52,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:14:52,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:14:52,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:52,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:14:52,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:14:52,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:52" (1/1) ... [2022-02-24 04:14:52,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4795bde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:52, skipping insertion in model container [2022-02-24 04:14:52,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:52" (1/1) ... [2022-02-24 04:14:52,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:14:53,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:14:53,206 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] [2022-02-24 04:14:53,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:53,412 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:14:53,425 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] [2022-02-24 04:14:53,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:53,523 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:14:53,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53 WrapperNode [2022-02-24 04:14:53,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:53,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:14:53,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:14:53,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:14:53,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:14:53,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:14:53,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:14:53,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:14:53,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:14:53,684 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) [2022-02-24 04:14:53,703 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 [2022-02-24 04:14:53,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-02-24 04:14:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-02-24 04:14:53,724 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-02-24 04:14:53,724 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-02-24 04:14:53,724 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-02-24 04:14:53,724 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-02-24 04:14:53,725 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-02-24 04:14:53,725 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-02-24 04:14:53,725 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-02-24 04:14:53,726 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-02-24 04:14:53,726 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-02-24 04:14:53,726 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-02-24 04:14:53,727 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-02-24 04:14:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 04:14:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 04:14:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 04:14:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-02-24 04:14:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 04:14:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:14:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:14:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:14:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-02-24 04:14:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 04:14:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:14:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:14:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:14:54,018 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:14:54,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:14:54,147 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,209 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-02-24 04:14:54,209 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-02-24 04:14:54,224 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,253 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-02-24 04:14:54,253 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-02-24 04:14:54,287 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,299 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 04:14:54,300 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 04:14:54,380 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,462 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-02-24 04:14:54,462 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-02-24 04:14:54,462 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-02-24 04:14:54,468 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,619 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-02-24 04:14:54,619 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-02-24 04:14:54,620 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,655 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 04:14:54,655 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 04:14:54,692 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-02-24 04:14:54,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-02-24 04:14:54,722 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,887 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-02-24 04:14:54,888 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-02-24 04:14:54,898 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:54,901 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:54,901 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:54,921 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:14:54,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:14:54,937 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:14:54,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:54 BoogieIcfgContainer [2022-02-24 04:14:54,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:14:54,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:14:54,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:14:54,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:14:54,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:52" (1/3) ... [2022-02-24 04:14:54,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e85e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:54, skipping insertion in model container [2022-02-24 04:14:54,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (2/3) ... [2022-02-24 04:14:54,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e85e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:54, skipping insertion in model container [2022-02-24 04:14:54,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:54" (3/3) ... [2022-02-24 04:14:54,949 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-02-24 04:14:54,955 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:14:54,955 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:14:54,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:14:55,004 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 04:14:55,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:14:55,039 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) [2022-02-24 04:14:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:14:55,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:55,057 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] [2022-02-24 04:14:55,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-02-24 04:14:55,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:55,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325554689] [2022-02-24 04:14:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:55,133 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:55,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:55,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325554689] [2022-02-24 04:14:55,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [325554689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:55,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:55,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 04:14:55,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027642902] [2022-02-24 04:14:55,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:55,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 04:14:55,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 04:14:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:14:55,501 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) [2022-02-24 04:14:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:57,696 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-02-24 04:14:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:57,698 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 [2022-02-24 04:14:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:57,713 INFO L225 Difference]: With dead ends: 1043 [2022-02-24 04:14:57,713 INFO L226 Difference]: Without dead ends: 663 [2022-02-24 04:14:57,719 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 [2022-02-24 04:14:57,722 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:57,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 04:14:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-24 04:14:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-02-24 04:14:57,827 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) [2022-02-24 04:14:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-02-24 04:14:57,832 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-02-24 04:14:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:57,832 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-02-24 04:14:57,832 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) [2022-02-24 04:14:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-02-24 04:14:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:14:57,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:57,834 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] [2022-02-24 04:14:57,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:14:57,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-02-24 04:14:57,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:57,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455784587] [2022-02-24 04:14:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:57,839 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:58,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:58,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455784587] [2022-02-24 04:14:58,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455784587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:58,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:58,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:58,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273395516] [2022-02-24 04:14:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:58,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:58,030 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) [2022-02-24 04:14:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:59,912 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-02-24 04:14:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:59,912 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 [2022-02-24 04:14:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:59,920 INFO L225 Difference]: With dead ends: 961 [2022-02-24 04:14:59,920 INFO L226 Difference]: Without dead ends: 842 [2022-02-24 04:14:59,921 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 [2022-02-24 04:14:59,922 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 1480 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:59,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1025 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:14:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-24 04:15:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-02-24 04:15:00,006 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) [2022-02-24 04:15:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-02-24 04:15:00,010 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-02-24 04:15:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:00,010 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-02-24 04:15:00,010 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) [2022-02-24 04:15:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-02-24 04:15:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:15:00,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:00,043 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] [2022-02-24 04:15:00,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:15:00,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-02-24 04:15:00,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:00,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224486285] [2022-02-24 04:15:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:00,050 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:00,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:00,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224486285] [2022-02-24 04:15:00,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [224486285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:00,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:00,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:00,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395159491] [2022-02-24 04:15:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:00,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:00,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:00,199 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) [2022-02-24 04:15:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:01,950 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-02-24 04:15:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:01,951 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 [2022-02-24 04:15:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:01,957 INFO L225 Difference]: With dead ends: 1142 [2022-02-24 04:15:01,958 INFO L226 Difference]: Without dead ends: 966 [2022-02-24 04:15:01,958 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 [2022-02-24 04:15:01,964 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:01,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 861 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:15:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-02-24 04:15:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-02-24 04:15:02,076 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) [2022-02-24 04:15:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-02-24 04:15:02,080 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-02-24 04:15:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:02,081 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-02-24 04:15:02,081 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) [2022-02-24 04:15:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-02-24 04:15:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:15:02,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:02,083 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] [2022-02-24 04:15:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:15:02,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-02-24 04:15:02,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:02,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871216156] [2022-02-24 04:15:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:02,087 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:02,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:02,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871216156] [2022-02-24 04:15:02,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871216156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:02,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:02,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:02,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11820001] [2022-02-24 04:15:02,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:02,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:02,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:02,219 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) [2022-02-24 04:15:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:04,814 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-02-24 04:15:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:04,815 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 [2022-02-24 04:15:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:04,823 INFO L225 Difference]: With dead ends: 1624 [2022-02-24 04:15:04,823 INFO L226 Difference]: Without dead ends: 1340 [2022-02-24 04:15:04,825 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 [2022-02-24 04:15:04,825 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 746 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:04,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1256 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 04:15:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-02-24 04:15:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-02-24 04:15:04,939 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) [2022-02-24 04:15:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-02-24 04:15:04,944 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-02-24 04:15:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:04,945 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-02-24 04:15:04,945 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) [2022-02-24 04:15:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-02-24 04:15:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:15:04,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:04,950 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] [2022-02-24 04:15:04,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:15:04,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-02-24 04:15:04,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:04,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206330548] [2022-02-24 04:15:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:04,955 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:05,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:05,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206330548] [2022-02-24 04:15:05,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206330548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:05,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:05,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:05,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836209525] [2022-02-24 04:15:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:05,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:05,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:05,177 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) [2022-02-24 04:15:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:07,246 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-02-24 04:15:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:07,247 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 [2022-02-24 04:15:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:07,253 INFO L225 Difference]: With dead ends: 1626 [2022-02-24 04:15:07,253 INFO L226 Difference]: Without dead ends: 1042 [2022-02-24 04:15:07,255 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 [2022-02-24 04:15:07,256 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 2491 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 991 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 04:15:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-24 04:15:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-02-24 04:15:07,370 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) [2022-02-24 04:15:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-02-24 04:15:07,375 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-02-24 04:15:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:07,375 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-02-24 04:15:07,375 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) [2022-02-24 04:15:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-02-24 04:15:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 04:15:07,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:07,377 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] [2022-02-24 04:15:07,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:15:07,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-02-24 04:15:07,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:07,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116221005] [2022-02-24 04:15:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:07,381 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:07,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:07,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116221005] [2022-02-24 04:15:07,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116221005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:07,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:07,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:07,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649043460] [2022-02-24 04:15:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:07,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:07,495 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) [2022-02-24 04:15:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:09,191 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-02-24 04:15:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:09,192 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 [2022-02-24 04:15:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:09,198 INFO L225 Difference]: With dead ends: 963 [2022-02-24 04:15:09,198 INFO L226 Difference]: Without dead ends: 959 [2022-02-24 04:15:09,201 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 [2022-02-24 04:15:09,203 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1150 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:09,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 952 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:15:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-24 04:15:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-02-24 04:15:09,335 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) [2022-02-24 04:15:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-02-24 04:15:09,338 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-02-24 04:15:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-02-24 04:15:09,339 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) [2022-02-24 04:15:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-02-24 04:15:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 04:15:09,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:09,342 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] [2022-02-24 04:15:09,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:15:09,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-02-24 04:15:09,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:09,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139189293] [2022-02-24 04:15:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:09,346 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:09,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:09,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139189293] [2022-02-24 04:15:09,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139189293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:09,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:09,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:09,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885937851] [2022-02-24 04:15:09,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:09,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:09,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:09,519 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) [2022-02-24 04:15:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:11,393 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-02-24 04:15:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:11,393 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 [2022-02-24 04:15:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:11,398 INFO L225 Difference]: With dead ends: 1409 [2022-02-24 04:15:11,398 INFO L226 Difference]: Without dead ends: 993 [2022-02-24 04:15:11,400 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 [2022-02-24 04:15:11,400 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:11,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1232 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 04:15:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-24 04:15:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-02-24 04:15:11,507 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) [2022-02-24 04:15:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-02-24 04:15:11,510 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-02-24 04:15:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:11,510 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-02-24 04:15:11,510 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) [2022-02-24 04:15:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-02-24 04:15:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:15:11,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:11,514 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] [2022-02-24 04:15:11,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:15:11,514 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:11,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-02-24 04:15:11,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:11,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461282905] [2022-02-24 04:15:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:11,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:11,518 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:11,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:11,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461282905] [2022-02-24 04:15:11,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [461282905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:11,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:11,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:11,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423144025] [2022-02-24 04:15:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:11,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:11,647 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) [2022-02-24 04:15:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:13,012 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-02-24 04:15:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:13,012 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 [2022-02-24 04:15:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:13,017 INFO L225 Difference]: With dead ends: 975 [2022-02-24 04:15:13,017 INFO L226 Difference]: Without dead ends: 957 [2022-02-24 04:15:13,018 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 [2022-02-24 04:15:13,018 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 [2022-02-24 04:15:13,019 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] [2022-02-24 04:15:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-24 04:15:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-02-24 04:15:13,164 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) [2022-02-24 04:15:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-02-24 04:15:13,167 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-02-24 04:15:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:13,169 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-02-24 04:15:13,169 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) [2022-02-24 04:15:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-02-24 04:15:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 04:15:13,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:13,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:13,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:15:13,174 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-02-24 04:15:13,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:13,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014136299] [2022-02-24 04:15:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:13,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:13,177 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-24 04:15:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:13,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:13,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014136299] [2022-02-24 04:15:13,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014136299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:13,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:13,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:13,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242606016] [2022-02-24 04:15:13,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:13,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:13,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:13,312 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) [2022-02-24 04:15:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:14,997 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-02-24 04:15:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:14,998 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 [2022-02-24 04:15:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:15,003 INFO L225 Difference]: With dead ends: 1159 [2022-02-24 04:15:15,003 INFO L226 Difference]: Without dead ends: 934 [2022-02-24 04:15:15,004 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 [2022-02-24 04:15:15,005 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:15,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1341 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 04:15:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-02-24 04:15:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-02-24 04:15:15,141 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) [2022-02-24 04:15:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-02-24 04:15:15,144 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-02-24 04:15:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:15,144 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-02-24 04:15:15,145 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) [2022-02-24 04:15:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-02-24 04:15:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 04:15:15,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:15,148 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] [2022-02-24 04:15:15,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:15:15,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-02-24 04:15:15,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:15,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227525692] [2022-02-24 04:15:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:15,152 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 04:15:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:15,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:15,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227525692] [2022-02-24 04:15:15,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227525692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:15,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:15,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:15,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049804212] [2022-02-24 04:15:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:15,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:15,291 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) [2022-02-24 04:15:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:16,239 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-02-24 04:15:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:16,241 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 [2022-02-24 04:15:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:16,245 INFO L225 Difference]: With dead ends: 956 [2022-02-24 04:15:16,245 INFO L226 Difference]: Without dead ends: 889 [2022-02-24 04:15:16,246 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 [2022-02-24 04:15:16,246 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1894 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:16,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 1086 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-24 04:15:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-02-24 04:15:16,356 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) [2022-02-24 04:15:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-02-24 04:15:16,359 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-02-24 04:15:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:16,359 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-02-24 04:15:16,360 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) [2022-02-24 04:15:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-02-24 04:15:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 04:15:16,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:16,362 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] [2022-02-24 04:15:16,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:15:16,362 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-02-24 04:15:16,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:16,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760062143] [2022-02-24 04:15:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:16,366 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:16,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:16,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760062143] [2022-02-24 04:15:16,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [760062143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:16,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:16,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:16,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681851269] [2022-02-24 04:15:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:16,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:16,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:16,519 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) [2022-02-24 04:15:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:19,190 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-02-24 04:15:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:19,191 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 [2022-02-24 04:15:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:19,195 INFO L225 Difference]: With dead ends: 1059 [2022-02-24 04:15:19,195 INFO L226 Difference]: Without dead ends: 998 [2022-02-24 04:15:19,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:15:19,197 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1792 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:19,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2029 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 04:15:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-24 04:15:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-02-24 04:15:19,345 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) [2022-02-24 04:15:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-02-24 04:15:19,348 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-02-24 04:15:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:19,348 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-02-24 04:15:19,348 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) [2022-02-24 04:15:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-02-24 04:15:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:15:19,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:19,350 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] [2022-02-24 04:15:19,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:15:19,351 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-02-24 04:15:19,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:19,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938130840] [2022-02-24 04:15:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:19,355 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:19,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:19,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938130840] [2022-02-24 04:15:19,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [938130840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:19,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:19,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:19,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018031963] [2022-02-24 04:15:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:19,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:19,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:19,494 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) [2022-02-24 04:15:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:21,301 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-02-24 04:15:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:21,301 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 [2022-02-24 04:15:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:21,306 INFO L225 Difference]: With dead ends: 1094 [2022-02-24 04:15:21,307 INFO L226 Difference]: Without dead ends: 1083 [2022-02-24 04:15:21,307 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 [2022-02-24 04:15:21,308 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1242 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:21,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 1360 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:15:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-24 04:15:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-02-24 04:15:21,457 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) [2022-02-24 04:15:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-02-24 04:15:21,460 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-02-24 04:15:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:21,461 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-02-24 04:15:21,461 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) [2022-02-24 04:15:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-02-24 04:15:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:15:21,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:21,463 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] [2022-02-24 04:15:21,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:15:21,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-02-24 04:15:21,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:21,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428619118] [2022-02-24 04:15:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:21,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:21,467 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:21,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:21,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428619118] [2022-02-24 04:15:21,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [428619118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:21,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:21,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:21,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067813854] [2022-02-24 04:15:21,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:21,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:21,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:21,640 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) [2022-02-24 04:15:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:23,938 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-02-24 04:15:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:23,939 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 [2022-02-24 04:15:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:23,943 INFO L225 Difference]: With dead ends: 1020 [2022-02-24 04:15:23,943 INFO L226 Difference]: Without dead ends: 957 [2022-02-24 04:15:23,944 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 [2022-02-24 04:15:23,944 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 [2022-02-24 04:15:23,945 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] [2022-02-24 04:15:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-24 04:15:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-02-24 04:15:24,109 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) [2022-02-24 04:15:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-02-24 04:15:24,111 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-02-24 04:15:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:24,111 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-02-24 04:15:24,112 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) [2022-02-24 04:15:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-02-24 04:15:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:24,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:24,114 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] [2022-02-24 04:15:24,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:15:24,114 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-02-24 04:15:24,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:24,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619920389] [2022-02-24 04:15:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:24,117 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:24,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:24,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619920389] [2022-02-24 04:15:24,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [619920389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:24,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:24,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:24,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803269165] [2022-02-24 04:15:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:24,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:24,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:24,315 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) [2022-02-24 04:15:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:26,169 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-02-24 04:15:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:26,169 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 [2022-02-24 04:15:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:26,172 INFO L225 Difference]: With dead ends: 982 [2022-02-24 04:15:26,172 INFO L226 Difference]: Without dead ends: 977 [2022-02-24 04:15:26,172 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 [2022-02-24 04:15:26,173 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:26,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1435 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 04:15:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-02-24 04:15:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-02-24 04:15:26,313 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) [2022-02-24 04:15:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-02-24 04:15:26,316 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-02-24 04:15:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-02-24 04:15:26,316 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) [2022-02-24 04:15:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-02-24 04:15:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:26,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:26,318 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] [2022-02-24 04:15:26,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:15:26,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-02-24 04:15:26,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:26,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932361639] [2022-02-24 04:15:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:26,322 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:15:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:26,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:26,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932361639] [2022-02-24 04:15:26,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932361639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:26,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:26,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:26,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374300020] [2022-02-24 04:15:26,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:26,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:26,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:26,446 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) [2022-02-24 04:15:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:28,341 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-02-24 04:15:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:28,342 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 [2022-02-24 04:15:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:28,346 INFO L225 Difference]: With dead ends: 1188 [2022-02-24 04:15:28,346 INFO L226 Difference]: Without dead ends: 947 [2022-02-24 04:15:28,347 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 [2022-02-24 04:15:28,347 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1034 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:28,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1163 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 04:15:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-02-24 04:15:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-02-24 04:15:28,543 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) [2022-02-24 04:15:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-02-24 04:15:28,546 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-02-24 04:15:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:28,546 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-02-24 04:15:28,546 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) [2022-02-24 04:15:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-02-24 04:15:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:15:28,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:28,549 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] [2022-02-24 04:15:28,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:15:28,549 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-02-24 04:15:28,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:28,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564046298] [2022-02-24 04:15:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:28,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:28,552 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:28,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:28,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564046298] [2022-02-24 04:15:28,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564046298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:28,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:28,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:28,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619705920] [2022-02-24 04:15:28,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:28,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:28,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:28,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:28,725 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) [2022-02-24 04:15:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:31,422 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-02-24 04:15:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:31,423 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 [2022-02-24 04:15:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:31,428 INFO L225 Difference]: With dead ends: 962 [2022-02-24 04:15:31,428 INFO L226 Difference]: Without dead ends: 958 [2022-02-24 04:15:31,428 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 [2022-02-24 04:15:31,429 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:31,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2378 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 04:15:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-24 04:15:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-02-24 04:15:31,602 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) [2022-02-24 04:15:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-02-24 04:15:31,604 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-02-24 04:15:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:31,605 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-02-24 04:15:31,605 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) [2022-02-24 04:15:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-02-24 04:15:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:15:31,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:31,607 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] [2022-02-24 04:15:31,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:15:31,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-02-24 04:15:31,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:31,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856328119] [2022-02-24 04:15:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:31,611 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:31,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:31,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856328119] [2022-02-24 04:15:31,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856328119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:31,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:31,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:31,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485320144] [2022-02-24 04:15:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:31,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:31,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:31,812 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) [2022-02-24 04:15:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:34,260 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-02-24 04:15:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:34,261 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 [2022-02-24 04:15:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:34,265 INFO L225 Difference]: With dead ends: 977 [2022-02-24 04:15:34,265 INFO L226 Difference]: Without dead ends: 953 [2022-02-24 04:15:34,266 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 [2022-02-24 04:15:34,267 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 737 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3839 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:34,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2436 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 3839 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 04:15:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-02-24 04:15:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-02-24 04:15:34,460 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) [2022-02-24 04:15:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-02-24 04:15:34,463 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-02-24 04:15:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:34,463 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-02-24 04:15:34,463 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) [2022-02-24 04:15:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-02-24 04:15:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 04:15:34,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:34,465 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] [2022-02-24 04:15:34,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:15:34,466 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-02-24 04:15:34,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:34,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066978100] [2022-02-24 04:15:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:34,469 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:34,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:34,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066978100] [2022-02-24 04:15:34,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066978100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:34,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:34,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:34,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857353107] [2022-02-24 04:15:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:34,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:34,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:34,712 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) [2022-02-24 04:15:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:37,301 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-02-24 04:15:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:37,302 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 [2022-02-24 04:15:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:37,305 INFO L225 Difference]: With dead ends: 963 [2022-02-24 04:15:37,305 INFO L226 Difference]: Without dead ends: 957 [2022-02-24 04:15:37,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:15:37,306 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1931 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1957 Valid, 1476 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 04:15:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-24 04:15:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-02-24 04:15:37,492 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) [2022-02-24 04:15:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-02-24 04:15:37,494 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-02-24 04:15:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:37,494 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-02-24 04:15:37,495 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) [2022-02-24 04:15:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-02-24 04:15:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:37,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:37,497 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] [2022-02-24 04:15:37,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:15:37,497 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-02-24 04:15:37,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:37,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214730790] [2022-02-24 04:15:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:37,500 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:37,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:37,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214730790] [2022-02-24 04:15:37,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214730790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:37,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:37,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:37,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107554599] [2022-02-24 04:15:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:37,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:37,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:37,668 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) [2022-02-24 04:15:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:39,598 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-02-24 04:15:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:39,598 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 [2022-02-24 04:15:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:39,602 INFO L225 Difference]: With dead ends: 967 [2022-02-24 04:15:39,602 INFO L226 Difference]: Without dead ends: 931 [2022-02-24 04:15:39,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:39,603 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 2284 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:39,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1257 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 04:15:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-24 04:15:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-02-24 04:15:39,776 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) [2022-02-24 04:15:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-02-24 04:15:39,778 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-02-24 04:15:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-02-24 04:15:39,779 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) [2022-02-24 04:15:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-02-24 04:15:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:39,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:39,781 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] [2022-02-24 04:15:39,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:15:39,781 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-02-24 04:15:39,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:39,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4031413] [2022-02-24 04:15:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:39,784 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:40,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:40,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4031413] [2022-02-24 04:15:40,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [4031413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:40,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:40,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:40,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993411344] [2022-02-24 04:15:40,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:40,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:40,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:40,047 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) [2022-02-24 04:15:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:42,347 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-02-24 04:15:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:42,347 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 [2022-02-24 04:15:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:42,351 INFO L225 Difference]: With dead ends: 933 [2022-02-24 04:15:42,351 INFO L226 Difference]: Without dead ends: 927 [2022-02-24 04:15:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:15:42,352 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2924 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:42,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 1295 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 04:15:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-02-24 04:15:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-02-24 04:15:42,592 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) [2022-02-24 04:15:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-02-24 04:15:42,594 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-02-24 04:15:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:42,594 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-02-24 04:15:42,595 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) [2022-02-24 04:15:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-02-24 04:15:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:42,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:42,597 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] [2022-02-24 04:15:42,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:15:42,597 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-02-24 04:15:42,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:42,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282171855] [2022-02-24 04:15:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:42,601 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:42,825 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:42,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282171855] [2022-02-24 04:15:42,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282171855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:42,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:42,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:42,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644301682] [2022-02-24 04:15:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:42,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:42,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:42,827 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) [2022-02-24 04:15:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:45,439 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-02-24 04:15:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:45,445 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 [2022-02-24 04:15:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:45,448 INFO L225 Difference]: With dead ends: 956 [2022-02-24 04:15:45,448 INFO L226 Difference]: Without dead ends: 916 [2022-02-24 04:15:45,449 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 [2022-02-24 04:15:45,449 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:45,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2655 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 04:15:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-02-24 04:15:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-02-24 04:15:45,663 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) [2022-02-24 04:15:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-02-24 04:15:45,665 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-02-24 04:15:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:45,665 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-02-24 04:15:45,665 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) [2022-02-24 04:15:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-02-24 04:15:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:15:45,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:45,668 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] [2022-02-24 04:15:45,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:15:45,668 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:45,668 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-02-24 04:15:45,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:45,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952841241] [2022-02-24 04:15:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:45,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:45,671 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:15:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:45,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:45,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952841241] [2022-02-24 04:15:45,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952841241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:45,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:45,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:45,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271267146] [2022-02-24 04:15:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:45,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:45,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:45,936 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) [2022-02-24 04:15:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:48,686 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-02-24 04:15:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:48,688 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 [2022-02-24 04:15:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:48,691 INFO L225 Difference]: With dead ends: 932 [2022-02-24 04:15:48,691 INFO L226 Difference]: Without dead ends: 914 [2022-02-24 04:15:48,691 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 [2022-02-24 04:15:48,692 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 991 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:48,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2775 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 04:15:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-02-24 04:15:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-02-24 04:15:48,883 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) [2022-02-24 04:15:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-02-24 04:15:48,885 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 56 [2022-02-24 04:15:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:48,885 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-02-24 04:15:48,886 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) [2022-02-24 04:15:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-02-24 04:15:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:48,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:48,888 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] [2022-02-24 04:15:48,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:15:48,888 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-02-24 04:15:48,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:48,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837551812] [2022-02-24 04:15:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:48,891 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:15:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:49,096 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:49,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837551812] [2022-02-24 04:15:49,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [837551812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:49,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:49,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:49,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159465536] [2022-02-24 04:15:49,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:49,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:49,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:49,097 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) [2022-02-24 04:15:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:51,700 INFO L93 Difference]: Finished difference Result 927 states and 1303 transitions. [2022-02-24 04:15:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:51,701 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 [2022-02-24 04:15:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:51,704 INFO L225 Difference]: With dead ends: 927 [2022-02-24 04:15:51,704 INFO L226 Difference]: Without dead ends: 909 [2022-02-24 04:15:51,705 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 [2022-02-24 04:15:51,705 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 363 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:51,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2581 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 04:15:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-02-24 04:15:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-02-24 04:15:51,952 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) [2022-02-24 04:15:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1072 transitions. [2022-02-24 04:15:51,954 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1072 transitions. Word has length 55 [2022-02-24 04:15:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:51,954 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1072 transitions. [2022-02-24 04:15:51,955 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) [2022-02-24 04:15:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1072 transitions. [2022-02-24 04:15:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:15:51,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:51,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:51,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:15:51,958 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-02-24 04:15:51,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:51,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169747265] [2022-02-24 04:15:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:51,960 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:52,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:52,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169747265] [2022-02-24 04:15:52,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [169747265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:52,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:52,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:52,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960272356] [2022-02-24 04:15:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:52,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:52,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:52,127 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) [2022-02-24 04:15:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:54,405 INFO L93 Difference]: Finished difference Result 974 states and 1354 transitions. [2022-02-24 04:15:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:54,406 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 [2022-02-24 04:15:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:54,410 INFO L225 Difference]: With dead ends: 974 [2022-02-24 04:15:54,410 INFO L226 Difference]: Without dead ends: 931 [2022-02-24 04:15:54,411 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 [2022-02-24 04:15:54,411 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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 [2022-02-24 04:15:54,411 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] [2022-02-24 04:15:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-24 04:15:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 789. [2022-02-24 04:15:54,620 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) [2022-02-24 04:15:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-02-24 04:15:54,622 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-02-24 04:15:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:54,622 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-02-24 04:15:54,622 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) [2022-02-24 04:15:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-02-24 04:15:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:15:54,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:54,625 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] [2022-02-24 04:15:54,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:15:54,625 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 1 times [2022-02-24 04:15:54,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:54,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139903799] [2022-02-24 04:15:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:54,628 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:15:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 04:15:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:54,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:54,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139903799] [2022-02-24 04:15:54,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139903799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:54,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:54,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:54,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691703664] [2022-02-24 04:15:54,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:54,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:54,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:54,794 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) [2022-02-24 04:15:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:56,055 INFO L93 Difference]: Finished difference Result 1224 states and 1667 transitions. [2022-02-24 04:15:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:56,056 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 [2022-02-24 04:15:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:56,059 INFO L225 Difference]: With dead ends: 1224 [2022-02-24 04:15:56,059 INFO L226 Difference]: Without dead ends: 778 [2022-02-24 04:15:56,060 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 [2022-02-24 04:15:56,061 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:56,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 797 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:15:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-24 04:15:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-02-24 04:15:56,246 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) [2022-02-24 04:15:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1042 transitions. [2022-02-24 04:15:56,248 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1042 transitions. Word has length 73 [2022-02-24 04:15:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:56,249 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1042 transitions. [2022-02-24 04:15:56,249 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) [2022-02-24 04:15:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1042 transitions. [2022-02-24 04:15:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:56,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:56,251 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] [2022-02-24 04:15:56,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:15:56,252 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-02-24 04:15:56,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:56,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371341292] [2022-02-24 04:15:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:56,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:56,255 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:56,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:56,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371341292] [2022-02-24 04:15:56,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371341292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:56,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:56,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:56,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336399346] [2022-02-24 04:15:56,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:56,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:56,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:56,396 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) [2022-02-24 04:15:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:57,692 INFO L93 Difference]: Finished difference Result 911 states and 1202 transitions. [2022-02-24 04:15:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:57,692 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 [2022-02-24 04:15:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:57,695 INFO L225 Difference]: With dead ends: 911 [2022-02-24 04:15:57,695 INFO L226 Difference]: Without dead ends: 820 [2022-02-24 04:15:57,696 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 [2022-02-24 04:15:57,696 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 [2022-02-24 04:15:57,696 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] [2022-02-24 04:15:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-24 04:15:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 788. [2022-02-24 04:15:57,891 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) [2022-02-24 04:15:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1048 transitions. [2022-02-24 04:15:57,893 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1048 transitions. Word has length 61 [2022-02-24 04:15:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:57,893 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1048 transitions. [2022-02-24 04:15:57,893 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) [2022-02-24 04:15:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1048 transitions. [2022-02-24 04:15:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 04:15:57,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:57,895 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] [2022-02-24 04:15:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:15:57,895 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-02-24 04:15:57,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:57,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645570444] [2022-02-24 04:15:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:57,899 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 04:15:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:58,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:58,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645570444] [2022-02-24 04:15:58,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645570444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:58,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:58,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:15:58,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274298723] [2022-02-24 04:15:58,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:58,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:15:58,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:15:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:15:58,202 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) [2022-02-24 04:16:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:00,975 INFO L93 Difference]: Finished difference Result 814 states and 1076 transitions. [2022-02-24 04:16:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:00,976 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 [2022-02-24 04:16:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:00,979 INFO L225 Difference]: With dead ends: 814 [2022-02-24 04:16:00,979 INFO L226 Difference]: Without dead ends: 790 [2022-02-24 04:16:00,979 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 [2022-02-24 04:16:00,980 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 709 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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 [2022-02-24 04:16:00,980 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] [2022-02-24 04:16:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-24 04:16:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-02-24 04:16:01,165 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) [2022-02-24 04:16:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1044 transitions. [2022-02-24 04:16:01,167 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1044 transitions. Word has length 62 [2022-02-24 04:16:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:01,167 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1044 transitions. [2022-02-24 04:16:01,167 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) [2022-02-24 04:16:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1044 transitions. [2022-02-24 04:16:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:16:01,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:01,169 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] [2022-02-24 04:16:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:16:01,169 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-02-24 04:16:01,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:01,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229209674] [2022-02-24 04:16:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:01,172 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:01,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:01,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229209674] [2022-02-24 04:16:01,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229209674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:01,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:01,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:16:01,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521862183] [2022-02-24 04:16:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:01,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:16:01,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:16:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:16:01,467 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) [2022-02-24 04:16:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:04,006 INFO L93 Difference]: Finished difference Result 812 states and 1072 transitions. [2022-02-24 04:16:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:04,006 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 [2022-02-24 04:16:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:04,009 INFO L225 Difference]: With dead ends: 812 [2022-02-24 04:16:04,009 INFO L226 Difference]: Without dead ends: 787 [2022-02-24 04:16:04,009 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 [2022-02-24 04:16:04,010 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 [2022-02-24 04:16:04,010 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] [2022-02-24 04:16:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-24 04:16:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2022-02-24 04:16:04,201 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) [2022-02-24 04:16:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1033 transitions. [2022-02-24 04:16:04,202 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1033 transitions. Word has length 59 [2022-02-24 04:16:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:04,203 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1033 transitions. [2022-02-24 04:16:04,203 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) [2022-02-24 04:16:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1033 transitions. [2022-02-24 04:16:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:16:04,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:04,204 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] [2022-02-24 04:16:04,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:16:04,205 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-02-24 04:16:04,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:04,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676981756] [2022-02-24 04:16:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:04,208 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:04,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:04,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676981756] [2022-02-24 04:16:04,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676981756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:04,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:04,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:04,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877320980] [2022-02-24 04:16:04,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:04,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:04,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:04,486 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) [2022-02-24 04:16:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:06,888 INFO L93 Difference]: Finished difference Result 802 states and 1051 transitions. [2022-02-24 04:16:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:16:06,890 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 [2022-02-24 04:16:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:06,893 INFO L225 Difference]: With dead ends: 802 [2022-02-24 04:16:06,894 INFO L226 Difference]: Without dead ends: 782 [2022-02-24 04:16:06,894 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 [2022-02-24 04:16:06,894 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 641 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:06,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2143 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 04:16:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-24 04:16:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2022-02-24 04:16:07,085 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) [2022-02-24 04:16:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1028 transitions. [2022-02-24 04:16:07,086 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1028 transitions. Word has length 58 [2022-02-24 04:16:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:07,086 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1028 transitions. [2022-02-24 04:16:07,086 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) [2022-02-24 04:16:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1028 transitions. [2022-02-24 04:16:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:16:07,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:07,088 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] [2022-02-24 04:16:07,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:16:07,088 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-02-24 04:16:07,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:07,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754276043] [2022-02-24 04:16:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:07,091 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:16:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:07,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:07,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754276043] [2022-02-24 04:16:07,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [754276043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:07,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:07,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:07,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143262298] [2022-02-24 04:16:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:07,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:07,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:07,327 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) [2022-02-24 04:16:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:09,553 INFO L93 Difference]: Finished difference Result 835 states and 1083 transitions. [2022-02-24 04:16:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:09,553 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 [2022-02-24 04:16:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:09,555 INFO L225 Difference]: With dead ends: 835 [2022-02-24 04:16:09,555 INFO L226 Difference]: Without dead ends: 770 [2022-02-24 04:16:09,556 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 [2022-02-24 04:16:09,556 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 963 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 4086 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:09,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1937 Invalid, 4432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 4086 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 04:16:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-24 04:16:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2022-02-24 04:16:09,738 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) [2022-02-24 04:16:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1007 transitions. [2022-02-24 04:16:09,739 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1007 transitions. Word has length 59 [2022-02-24 04:16:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:09,739 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1007 transitions. [2022-02-24 04:16:09,739 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) [2022-02-24 04:16:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1007 transitions. [2022-02-24 04:16:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:16:09,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:09,741 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] [2022-02-24 04:16:09,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:16:09,741 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-02-24 04:16:09,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:09,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063551093] [2022-02-24 04:16:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:09,744 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:16:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:09,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:09,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063551093] [2022-02-24 04:16:09,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063551093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:09,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:09,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:16:09,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561724024] [2022-02-24 04:16:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:09,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:16:09,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:09,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:16:09,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:16:09,918 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) [2022-02-24 04:16:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:11,417 INFO L93 Difference]: Finished difference Result 913 states and 1205 transitions. [2022-02-24 04:16:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:16:11,417 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 [2022-02-24 04:16:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:11,419 INFO L225 Difference]: With dead ends: 913 [2022-02-24 04:16:11,419 INFO L226 Difference]: Without dead ends: 808 [2022-02-24 04:16:11,420 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 [2022-02-24 04:16:11,420 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:11,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1181 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 04:16:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-24 04:16:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 777. [2022-02-24 04:16:11,596 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) [2022-02-24 04:16:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1022 transitions. [2022-02-24 04:16:11,597 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1022 transitions. Word has length 60 [2022-02-24 04:16:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:11,598 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1022 transitions. [2022-02-24 04:16:11,598 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) [2022-02-24 04:16:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1022 transitions. [2022-02-24 04:16:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:16:11,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:11,599 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] [2022-02-24 04:16:11,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:16:11,600 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-02-24 04:16:11,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:11,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051848955] [2022-02-24 04:16:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:11,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:11,602 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:16:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:11,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:11,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051848955] [2022-02-24 04:16:11,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051848955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:11,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:11,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:11,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439718547] [2022-02-24 04:16:11,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:11,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:11,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:11,868 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) [2022-02-24 04:16:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:13,844 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2022-02-24 04:16:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:16:13,845 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 [2022-02-24 04:16:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:13,847 INFO L225 Difference]: With dead ends: 799 [2022-02-24 04:16:13,847 INFO L226 Difference]: Without dead ends: 775 [2022-02-24 04:16:13,847 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 [2022-02-24 04:16:13,848 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 [2022-02-24 04:16:13,848 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] [2022-02-24 04:16:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-24 04:16:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-02-24 04:16:14,020 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) [2022-02-24 04:16:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1018 transitions. [2022-02-24 04:16:14,022 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1018 transitions. Word has length 60 [2022-02-24 04:16:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1018 transitions. [2022-02-24 04:16:14,022 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) [2022-02-24 04:16:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1018 transitions. [2022-02-24 04:16:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:16:14,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:14,024 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, 1, 1, 1, 1] [2022-02-24 04:16:14,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:16:14,024 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-02-24 04:16:14,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:14,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368537611] [2022-02-24 04:16:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:14,027 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:16:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:14,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:14,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368537611] [2022-02-24 04:16:14,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368537611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:14,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:14,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:14,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145061615] [2022-02-24 04:16:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:14,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:14,296 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) [2022-02-24 04:16:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:16,440 INFO L93 Difference]: Finished difference Result 837 states and 1087 transitions. [2022-02-24 04:16:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:16,441 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 [2022-02-24 04:16:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:16,442 INFO L225 Difference]: With dead ends: 837 [2022-02-24 04:16:16,443 INFO L226 Difference]: Without dead ends: 767 [2022-02-24 04:16:16,443 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 [2022-02-24 04:16:16,443 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 659 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:16,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1766 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:16:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-24 04:16:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-02-24 04:16:16,619 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) [2022-02-24 04:16:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1002 transitions. [2022-02-24 04:16:16,620 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1002 transitions. Word has length 60 [2022-02-24 04:16:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:16,620 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1002 transitions. [2022-02-24 04:16:16,621 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) [2022-02-24 04:16:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1002 transitions. [2022-02-24 04:16:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:16:16,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:16,623 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] [2022-02-24 04:16:16,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:16:16,623 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-02-24 04:16:16,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:16,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099889183] [2022-02-24 04:16:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:16,626 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:16:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:16,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:16,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099889183] [2022-02-24 04:16:16,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099889183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:16,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:16,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:16,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079671114] [2022-02-24 04:16:16,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:16,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:16,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:16,818 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) [2022-02-24 04:16:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:18,370 INFO L93 Difference]: Finished difference Result 813 states and 1068 transitions. [2022-02-24 04:16:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:16:18,370 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 [2022-02-24 04:16:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:18,373 INFO L225 Difference]: With dead ends: 813 [2022-02-24 04:16:18,373 INFO L226 Difference]: Without dead ends: 779 [2022-02-24 04:16:18,374 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 [2022-02-24 04:16:18,374 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:18,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 1123 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 04:16:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-02-24 04:16:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 771. [2022-02-24 04:16:18,609 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) [2022-02-24 04:16:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1020 transitions. [2022-02-24 04:16:18,610 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1020 transitions. Word has length 61 [2022-02-24 04:16:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:18,610 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1020 transitions. [2022-02-24 04:16:18,611 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) [2022-02-24 04:16:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1020 transitions. [2022-02-24 04:16:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:16:18,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:18,612 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] [2022-02-24 04:16:18,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:16:18,612 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-02-24 04:16:18,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:18,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569293959] [2022-02-24 04:16:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:18,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:18,614 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:18,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:18,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569293959] [2022-02-24 04:16:18,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [569293959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:18,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:18,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:16:18,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975175943] [2022-02-24 04:16:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:16:18,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:16:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:16:18,974 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) [2022-02-24 04:16:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:21,608 INFO L93 Difference]: Finished difference Result 788 states and 1038 transitions. [2022-02-24 04:16:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:21,609 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 [2022-02-24 04:16:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:21,611 INFO L225 Difference]: With dead ends: 788 [2022-02-24 04:16:21,611 INFO L226 Difference]: Without dead ends: 766 [2022-02-24 04:16:21,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:16:21,612 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 [2022-02-24 04:16:21,612 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] [2022-02-24 04:16:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-02-24 04:16:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-02-24 04:16:21,835 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) [2022-02-24 04:16:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1013 transitions. [2022-02-24 04:16:21,836 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1013 transitions. Word has length 63 [2022-02-24 04:16:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:21,836 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1013 transitions. [2022-02-24 04:16:21,836 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) [2022-02-24 04:16:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1013 transitions. [2022-02-24 04:16:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 04:16:21,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:21,838 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] [2022-02-24 04:16:21,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:16:21,838 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-02-24 04:16:21,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:21,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766926126] [2022-02-24 04:16:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:21,841 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:21,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:21,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:22,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:22,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:22,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:22,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766926126] [2022-02-24 04:16:22,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766926126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:22,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:22,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:16:22,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694722794] [2022-02-24 04:16:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:22,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:16:22,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:16:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:16:22,107 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) [2022-02-24 04:16:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:24,417 INFO L93 Difference]: Finished difference Result 783 states and 1031 transitions. [2022-02-24 04:16:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:24,417 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 [2022-02-24 04:16:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:24,423 INFO L225 Difference]: With dead ends: 783 [2022-02-24 04:16:24,423 INFO L226 Difference]: Without dead ends: 761 [2022-02-24 04:16:24,424 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 [2022-02-24 04:16:24,425 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 591 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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 [2022-02-24 04:16:24,425 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] [2022-02-24 04:16:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-24 04:16:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-02-24 04:16:24,598 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) [2022-02-24 04:16:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1006 transitions. [2022-02-24 04:16:24,600 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1006 transitions. Word has length 62 [2022-02-24 04:16:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:24,600 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1006 transitions. [2022-02-24 04:16:24,600 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) [2022-02-24 04:16:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1006 transitions. [2022-02-24 04:16:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:16:24,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:24,601 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] [2022-02-24 04:16:24,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:16:24,602 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-02-24 04:16:24,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:24,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864515587] [2022-02-24 04:16:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:24,604 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:24,930 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:24,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864515587] [2022-02-24 04:16:24,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [864515587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:24,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:24,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:16:24,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625828977] [2022-02-24 04:16:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:24,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:16:24,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:16:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:24,933 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) [2022-02-24 04:16:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:27,569 INFO L93 Difference]: Finished difference Result 785 states and 1031 transitions. [2022-02-24 04:16:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:16:27,569 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 [2022-02-24 04:16:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:27,571 INFO L225 Difference]: With dead ends: 785 [2022-02-24 04:16:27,571 INFO L226 Difference]: Without dead ends: 761 [2022-02-24 04:16:27,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:16:27,572 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 1780 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:27,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2244 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 04:16:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-24 04:16:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 759. [2022-02-24 04:16:27,750 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) [2022-02-24 04:16:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1002 transitions. [2022-02-24 04:16:27,752 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1002 transitions. Word has length 67 [2022-02-24 04:16:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:27,752 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1002 transitions. [2022-02-24 04:16:27,752 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) [2022-02-24 04:16:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1002 transitions. [2022-02-24 04:16:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:16:27,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:27,754 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] [2022-02-24 04:16:27,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:16:27,754 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-02-24 04:16:27,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:27,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961402674] [2022-02-24 04:16:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:27,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:27,757 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:27,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:16:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:28,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:28,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961402674] [2022-02-24 04:16:28,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961402674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:28,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:28,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:16:28,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591246721] [2022-02-24 04:16:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:28,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:16:28,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:16:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:16:28,070 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) [2022-02-24 04:16:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:30,589 INFO L93 Difference]: Finished difference Result 781 states and 1025 transitions. [2022-02-24 04:16:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:16:30,589 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 [2022-02-24 04:16:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:30,592 INFO L225 Difference]: With dead ends: 781 [2022-02-24 04:16:30,592 INFO L226 Difference]: Without dead ends: 757 [2022-02-24 04:16:30,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-24 04:16:30,592 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 1456 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:30,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2141 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 04:16:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-24 04:16:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2022-02-24 04:16:30,787 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) [2022-02-24 04:16:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 998 transitions. [2022-02-24 04:16:30,788 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 998 transitions. Word has length 63 [2022-02-24 04:16:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:30,788 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 998 transitions. [2022-02-24 04:16:30,788 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) [2022-02-24 04:16:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 998 transitions. [2022-02-24 04:16:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:16:30,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:30,790 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] [2022-02-24 04:16:30,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:16:30,790 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-02-24 04:16:30,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:30,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011588327] [2022-02-24 04:16:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:30,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:30,799 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:30,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:30,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011588327] [2022-02-24 04:16:30,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011588327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:30,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:30,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:16:30,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707981980] [2022-02-24 04:16:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:30,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:16:30,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:16:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:16:30,955 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) [2022-02-24 04:16:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:31,998 INFO L93 Difference]: Finished difference Result 1021 states and 1347 transitions. [2022-02-24 04:16:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:16:31,999 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 [2022-02-24 04:16:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:32,001 INFO L225 Difference]: With dead ends: 1021 [2022-02-24 04:16:32,001 INFO L226 Difference]: Without dead ends: 702 [2022-02-24 04:16:32,002 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 [2022-02-24 04:16:32,002 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 1149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 863 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:16:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-24 04:16:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2022-02-24 04:16:32,158 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) [2022-02-24 04:16:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 882 transitions. [2022-02-24 04:16:32,159 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 882 transitions. Word has length 63 [2022-02-24 04:16:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:32,159 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 882 transitions. [2022-02-24 04:16:32,160 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) [2022-02-24 04:16:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 882 transitions. [2022-02-24 04:16:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:16:32,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:32,161 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] [2022-02-24 04:16:32,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:16:32,162 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-02-24 04:16:32,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:32,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883003008] [2022-02-24 04:16:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:32,165 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-24 04:16:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:32,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:32,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883003008] [2022-02-24 04:16:32,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [883003008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:32,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:32,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:16:32,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110839393] [2022-02-24 04:16:32,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:32,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:16:32,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:16:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:16:32,327 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) [2022-02-24 04:16:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:33,591 INFO L93 Difference]: Finished difference Result 805 states and 1038 transitions. [2022-02-24 04:16:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:16:33,591 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 [2022-02-24 04:16:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:33,595 INFO L225 Difference]: With dead ends: 805 [2022-02-24 04:16:33,596 INFO L226 Difference]: Without dead ends: 685 [2022-02-24 04:16:33,596 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 [2022-02-24 04:16:33,597 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 338 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:33,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 849 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:16:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-24 04:16:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-02-24 04:16:33,762 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) [2022-02-24 04:16:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-02-24 04:16:33,763 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 66 [2022-02-24 04:16:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:33,764 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-02-24 04:16:33,764 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) [2022-02-24 04:16:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-02-24 04:16:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:16:33,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:33,766 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] [2022-02-24 04:16:33,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 04:16:33,766 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-02-24 04:16:33,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:33,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684678398] [2022-02-24 04:16:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:33,769 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:33,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:33,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:33,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:16:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:34,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:34,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:34,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684678398] [2022-02-24 04:16:34,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [684678398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:34,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:34,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:16:34,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857069443] [2022-02-24 04:16:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:34,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:16:34,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:16:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:34,087 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) [2022-02-24 04:16:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:36,411 INFO L93 Difference]: Finished difference Result 707 states and 903 transitions. [2022-02-24 04:16:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:36,412 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 [2022-02-24 04:16:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:36,413 INFO L225 Difference]: With dead ends: 707 [2022-02-24 04:16:36,414 INFO L226 Difference]: Without dead ends: 683 [2022-02-24 04:16:36,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:16:36,414 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1194 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:36,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 2046 Invalid, 5233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 04:16:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-02-24 04:16:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-02-24 04:16:36,576 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) [2022-02-24 04:16:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 876 transitions. [2022-02-24 04:16:36,577 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 876 transitions. Word has length 66 [2022-02-24 04:16:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:36,578 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 876 transitions. [2022-02-24 04:16:36,578 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) [2022-02-24 04:16:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 876 transitions. [2022-02-24 04:16:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:16:36,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:36,579 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] [2022-02-24 04:16:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 04:16:36,580 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-02-24 04:16:36,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:36,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742337902] [2022-02-24 04:16:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:36,582 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:16:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:36,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:36,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742337902] [2022-02-24 04:16:36,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742337902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:36,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:36,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:36,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185034166] [2022-02-24 04:16:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:36,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:36,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:36,772 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) [2022-02-24 04:16:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:38,101 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2022-02-24 04:16:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:16:38,102 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 [2022-02-24 04:16:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:38,103 INFO L225 Difference]: With dead ends: 747 [2022-02-24 04:16:38,104 INFO L226 Difference]: Without dead ends: 714 [2022-02-24 04:16:38,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:38,104 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:38,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 863 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:16:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-24 04:16:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-02-24 04:16:38,282 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) [2022-02-24 04:16:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 884 transitions. [2022-02-24 04:16:38,283 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 884 transitions. Word has length 65 [2022-02-24 04:16:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 884 transitions. [2022-02-24 04:16:38,283 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) [2022-02-24 04:16:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 884 transitions. [2022-02-24 04:16:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:16:38,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:38,285 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] [2022-02-24 04:16:38,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 04:16:38,285 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-02-24 04:16:38,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:38,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942449828] [2022-02-24 04:16:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:38,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:38,287 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:16:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:38,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:38,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942449828] [2022-02-24 04:16:38,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942449828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:38,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:38,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:38,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800231254] [2022-02-24 04:16:38,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:38,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:38,470 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) [2022-02-24 04:16:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:39,730 INFO L93 Difference]: Finished difference Result 745 states and 945 transitions. [2022-02-24 04:16:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:16:39,730 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 [2022-02-24 04:16:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:39,732 INFO L225 Difference]: With dead ends: 745 [2022-02-24 04:16:39,732 INFO L226 Difference]: Without dead ends: 691 [2022-02-24 04:16:39,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:39,733 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 615 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:39,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 997 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:16:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-24 04:16:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-02-24 04:16:39,901 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) [2022-02-24 04:16:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 882 transitions. [2022-02-24 04:16:39,903 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 882 transitions. Word has length 66 [2022-02-24 04:16:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:39,903 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 882 transitions. [2022-02-24 04:16:39,903 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) [2022-02-24 04:16:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 882 transitions. [2022-02-24 04:16:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 04:16:39,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:39,905 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] [2022-02-24 04:16:39,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 04:16:39,905 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-02-24 04:16:39,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:39,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750214559] [2022-02-24 04:16:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:39,908 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:39,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:16:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:40,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:40,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750214559] [2022-02-24 04:16:40,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [750214559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:40,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:40,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:40,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66487865] [2022-02-24 04:16:40,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:40,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:40,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:40,137 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) [2022-02-24 04:16:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:42,286 INFO L93 Difference]: Finished difference Result 716 states and 912 transitions. [2022-02-24 04:16:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:42,287 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 [2022-02-24 04:16:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:42,288 INFO L225 Difference]: With dead ends: 716 [2022-02-24 04:16:42,289 INFO L226 Difference]: Without dead ends: 658 [2022-02-24 04:16:42,289 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 [2022-02-24 04:16:42,290 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 361 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:42,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1642 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 04:16:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-02-24 04:16:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2022-02-24 04:16:42,441 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) [2022-02-24 04:16:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-02-24 04:16:42,442 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 66 [2022-02-24 04:16:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:42,442 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-02-24 04:16:42,443 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) [2022-02-24 04:16:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-02-24 04:16:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:16:42,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:42,444 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] [2022-02-24 04:16:42,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 04:16:42,444 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-02-24 04:16:42,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:42,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227854111] [2022-02-24 04:16:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:42,447 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 04:16:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:42,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:42,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227854111] [2022-02-24 04:16:42,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [227854111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:42,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:42,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:42,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502891675] [2022-02-24 04:16:42,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:42,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:42,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:42,635 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) [2022-02-24 04:16:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:43,807 INFO L93 Difference]: Finished difference Result 686 states and 856 transitions. [2022-02-24 04:16:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:16:43,807 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 [2022-02-24 04:16:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:43,809 INFO L225 Difference]: With dead ends: 686 [2022-02-24 04:16:43,809 INFO L226 Difference]: Without dead ends: 647 [2022-02-24 04:16:43,809 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 [2022-02-24 04:16:43,810 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 510 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:43,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1027 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:16:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-24 04:16:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-02-24 04:16:43,947 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) [2022-02-24 04:16:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 814 transitions. [2022-02-24 04:16:43,948 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 814 transitions. Word has length 67 [2022-02-24 04:16:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:43,948 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 814 transitions. [2022-02-24 04:16:43,948 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) [2022-02-24 04:16:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 814 transitions. [2022-02-24 04:16:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:16:43,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:43,950 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] [2022-02-24 04:16:43,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 04:16:43,950 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-02-24 04:16:43,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:43,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317408458] [2022-02-24 04:16:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:43,953 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:44,125 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:44,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317408458] [2022-02-24 04:16:44,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [317408458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:44,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:44,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:16:44,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209200735] [2022-02-24 04:16:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:44,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:16:44,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:16:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:16:44,126 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) [2022-02-24 04:16:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:45,349 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2022-02-24 04:16:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:16:45,350 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 [2022-02-24 04:16:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:45,352 INFO L225 Difference]: With dead ends: 771 [2022-02-24 04:16:45,352 INFO L226 Difference]: Without dead ends: 763 [2022-02-24 04:16:45,352 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 [2022-02-24 04:16:45,352 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:45,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 925 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:16:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-24 04:16:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 689. [2022-02-24 04:16:45,580 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) [2022-02-24 04:16:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 861 transitions. [2022-02-24 04:16:45,581 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 861 transitions. Word has length 67 [2022-02-24 04:16:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:45,582 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 861 transitions. [2022-02-24 04:16:45,582 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) [2022-02-24 04:16:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 861 transitions. [2022-02-24 04:16:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:16:45,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:45,584 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] [2022-02-24 04:16:45,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 04:16:45,584 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-02-24 04:16:45,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:45,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064671963] [2022-02-24 04:16:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:45,587 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:45,793 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:45,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064671963] [2022-02-24 04:16:45,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064671963] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:45,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:45,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:45,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992984180] [2022-02-24 04:16:45,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:45,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:45,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:45,794 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) [2022-02-24 04:16:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:47,315 INFO L93 Difference]: Finished difference Result 767 states and 959 transitions. [2022-02-24 04:16:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:16:47,316 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 [2022-02-24 04:16:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:47,317 INFO L225 Difference]: With dead ends: 767 [2022-02-24 04:16:47,317 INFO L226 Difference]: Without dead ends: 761 [2022-02-24 04:16:47,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:16:47,318 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2022-02-24 04:16:47,318 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] [2022-02-24 04:16:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-24 04:16:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 689. [2022-02-24 04:16:47,492 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) [2022-02-24 04:16:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 860 transitions. [2022-02-24 04:16:47,493 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 860 transitions. Word has length 68 [2022-02-24 04:16:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:47,494 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 860 transitions. [2022-02-24 04:16:47,494 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) [2022-02-24 04:16:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 860 transitions. [2022-02-24 04:16:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 04:16:47,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:47,496 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] [2022-02-24 04:16:47,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 04:16:47,496 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-02-24 04:16:47,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:47,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140510496] [2022-02-24 04:16:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:47,499 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:16:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:16:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:47,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:47,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140510496] [2022-02-24 04:16:47,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2140510496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:47,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:47,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:16:47,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422975633] [2022-02-24 04:16:47,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:16:47,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:16:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:47,812 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) [2022-02-24 04:16:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:50,235 INFO L93 Difference]: Finished difference Result 722 states and 899 transitions. [2022-02-24 04:16:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:16:50,235 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 [2022-02-24 04:16:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:50,237 INFO L225 Difference]: With dead ends: 722 [2022-02-24 04:16:50,237 INFO L226 Difference]: Without dead ends: 698 [2022-02-24 04:16:50,237 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 [2022-02-24 04:16:50,238 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 311 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:50,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2212 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 04:16:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-24 04:16:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 687. [2022-02-24 04:16:50,404 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) [2022-02-24 04:16:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2022-02-24 04:16:50,405 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 74 [2022-02-24 04:16:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:50,406 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2022-02-24 04:16:50,406 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) [2022-02-24 04:16:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2022-02-24 04:16:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 04:16:50,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:50,407 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] [2022-02-24 04:16:50,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 04:16:50,407 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-02-24 04:16:50,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:50,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450583982] [2022-02-24 04:16:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:50,409 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:16:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 04:16:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:50,764 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450583982] [2022-02-24 04:16:50,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450583982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:50,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:50,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 04:16:50,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506356908] [2022-02-24 04:16:50,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:50,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 04:16:50,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 04:16:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:16:50,766 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) [2022-02-24 04:16:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:53,101 INFO L93 Difference]: Finished difference Result 711 states and 882 transitions. [2022-02-24 04:16:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:16:53,102 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 [2022-02-24 04:16:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:53,104 INFO L225 Difference]: With dead ends: 711 [2022-02-24 04:16:53,104 INFO L226 Difference]: Without dead ends: 684 [2022-02-24 04:16:53,105 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 [2022-02-24 04:16:53,105 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 789 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2269 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4575 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 04:16:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-24 04:16:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-02-24 04:16:53,270 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) [2022-02-24 04:16:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 851 transitions. [2022-02-24 04:16:53,272 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 851 transitions. Word has length 70 [2022-02-24 04:16:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 851 transitions. [2022-02-24 04:16:53,272 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) [2022-02-24 04:16:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 851 transitions. [2022-02-24 04:16:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 04:16:53,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:53,274 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] [2022-02-24 04:16:53,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 04:16:53,274 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-02-24 04:16:53,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:53,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183718465] [2022-02-24 04:16:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:53,276 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:53,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:53,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183718465] [2022-02-24 04:16:53,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183718465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:53,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:53,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:16:53,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266571345] [2022-02-24 04:16:53,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:53,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:16:53,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:16:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:16:53,660 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) [2022-02-24 04:16:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:55,637 INFO L93 Difference]: Finished difference Result 704 states and 872 transitions. [2022-02-24 04:16:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:55,638 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 [2022-02-24 04:16:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:55,640 INFO L225 Difference]: With dead ends: 704 [2022-02-24 04:16:55,640 INFO L226 Difference]: Without dead ends: 682 [2022-02-24 04:16:55,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:55,641 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 465 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:55,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 2031 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:16:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-24 04:16:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-02-24 04:16:55,810 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) [2022-02-24 04:16:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 847 transitions. [2022-02-24 04:16:55,811 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 847 transitions. Word has length 72 [2022-02-24 04:16:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:55,811 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 847 transitions. [2022-02-24 04:16:55,811 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) [2022-02-24 04:16:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 847 transitions. [2022-02-24 04:16:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:16:55,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:55,813 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] [2022-02-24 04:16:55,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 04:16:55,813 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-02-24 04:16:55,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:55,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031631152] [2022-02-24 04:16:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:55,816 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:55,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:55,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:56,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:16:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:56,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:56,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031631152] [2022-02-24 04:16:56,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031631152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:56,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:56,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:16:56,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834150678] [2022-02-24 04:16:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:56,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:16:56,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:16:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:16:56,188 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) [2022-02-24 04:16:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:58,195 INFO L93 Difference]: Finished difference Result 699 states and 865 transitions. [2022-02-24 04:16:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:58,196 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 [2022-02-24 04:16:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:58,198 INFO L225 Difference]: With dead ends: 699 [2022-02-24 04:16:58,198 INFO L226 Difference]: Without dead ends: 670 [2022-02-24 04:16:58,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:16:58,199 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 689 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:58,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 2003 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 04:16:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-24 04:16:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-02-24 04:16:58,428 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) [2022-02-24 04:16:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 831 transitions. [2022-02-24 04:16:58,429 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 831 transitions. Word has length 69 [2022-02-24 04:16:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:58,429 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 831 transitions. [2022-02-24 04:16:58,429 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) [2022-02-24 04:16:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 831 transitions. [2022-02-24 04:16:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:16:58,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:58,431 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] [2022-02-24 04:16:58,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 04:16:58,432 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-02-24 04:16:58,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:58,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373527620] [2022-02-24 04:16:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:58,435 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:16:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:16:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:16:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:58,618 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:58,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373527620] [2022-02-24 04:16:58,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373527620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:58,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:58,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:58,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125712167] [2022-02-24 04:16:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:58,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:58,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:58,620 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) [2022-02-24 04:17:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:00,075 INFO L93 Difference]: Finished difference Result 704 states and 866 transitions. [2022-02-24 04:17:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:00,076 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 [2022-02-24 04:17:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:00,077 INFO L225 Difference]: With dead ends: 704 [2022-02-24 04:17:00,077 INFO L226 Difference]: Without dead ends: 665 [2022-02-24 04:17:00,078 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 [2022-02-24 04:17:00,078 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 703 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:00,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 981 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:17:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-24 04:17:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-02-24 04:17:00,240 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) [2022-02-24 04:17:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 824 transitions. [2022-02-24 04:17:00,242 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 824 transitions. Word has length 69 [2022-02-24 04:17:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:00,242 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 824 transitions. [2022-02-24 04:17:00,242 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) [2022-02-24 04:17:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 824 transitions. [2022-02-24 04:17:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:17:00,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:00,243 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] [2022-02-24 04:17:00,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 04:17:00,244 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-02-24 04:17:00,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:00,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249981121] [2022-02-24 04:17:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:00,246 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:17:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:17:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:00,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:00,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249981121] [2022-02-24 04:17:00,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249981121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:00,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:00,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:17:00,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57652159] [2022-02-24 04:17:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:00,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:17:00,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:17:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:17:00,523 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) [2022-02-24 04:17:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:02,408 INFO L93 Difference]: Finished difference Result 692 states and 854 transitions. [2022-02-24 04:17:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:17:02,408 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 [2022-02-24 04:17:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:02,410 INFO L225 Difference]: With dead ends: 692 [2022-02-24 04:17:02,410 INFO L226 Difference]: Without dead ends: 662 [2022-02-24 04:17:02,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:17:02,411 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 260 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:02,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1933 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:17:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-24 04:17:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-02-24 04:17:02,568 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) [2022-02-24 04:17:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 819 transitions. [2022-02-24 04:17:02,569 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 819 transitions. Word has length 69 [2022-02-24 04:17:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:02,569 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 819 transitions. [2022-02-24 04:17:02,570 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) [2022-02-24 04:17:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 819 transitions. [2022-02-24 04:17:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:17:02,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:02,571 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] [2022-02-24 04:17:02,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 04:17:02,571 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-02-24 04:17:02,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:02,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209106187] [2022-02-24 04:17:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:02,573 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:02,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:02,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209106187] [2022-02-24 04:17:02,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [209106187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:02,844 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:02,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:17:02,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309916858] [2022-02-24 04:17:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:02,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:17:02,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:17:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:17:02,845 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) [2022-02-24 04:17:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:04,627 INFO L93 Difference]: Finished difference Result 672 states and 828 transitions. [2022-02-24 04:17:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 04:17:04,627 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 [2022-02-24 04:17:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:04,629 INFO L225 Difference]: With dead ends: 672 [2022-02-24 04:17:04,629 INFO L226 Difference]: Without dead ends: 666 [2022-02-24 04:17:04,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:17:04,631 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 748 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:04,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1544 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:17:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-24 04:17:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 660. [2022-02-24 04:17:04,849 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) [2022-02-24 04:17:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 815 transitions. [2022-02-24 04:17:04,850 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 815 transitions. Word has length 69 [2022-02-24 04:17:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:04,850 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 815 transitions. [2022-02-24 04:17:04,850 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) [2022-02-24 04:17:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 815 transitions. [2022-02-24 04:17:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 04:17:04,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:04,852 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] [2022-02-24 04:17:04,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 04:17:04,852 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-02-24 04:17:04,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:04,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749814648] [2022-02-24 04:17:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:04,855 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:04,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:04,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:04,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:05,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:05,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:05,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749814648] [2022-02-24 04:17:05,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [749814648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:05,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:05,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:05,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267007324] [2022-02-24 04:17:05,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:05,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:05,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:05,058 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) [2022-02-24 04:17:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:06,573 INFO L93 Difference]: Finished difference Result 736 states and 910 transitions. [2022-02-24 04:17:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:17:06,575 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 [2022-02-24 04:17:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:06,577 INFO L225 Difference]: With dead ends: 736 [2022-02-24 04:17:06,577 INFO L226 Difference]: Without dead ends: 674 [2022-02-24 04:17:06,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:17:06,578 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 901 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:06,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 840 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:17:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-24 04:17:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 604. [2022-02-24 04:17:06,777 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) [2022-02-24 04:17:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 744 transitions. [2022-02-24 04:17:06,778 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 744 transitions. Word has length 69 [2022-02-24 04:17:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:06,778 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 744 transitions. [2022-02-24 04:17:06,778 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) [2022-02-24 04:17:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 744 transitions. [2022-02-24 04:17:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:17:06,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:06,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:17:06,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 04:17:06,781 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-02-24 04:17:06,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:06,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654207799] [2022-02-24 04:17:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:06,783 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:06,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:07,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:17:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:07,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:07,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:07,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654207799] [2022-02-24 04:17:07,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [654207799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:07,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:07,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:17:07,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790790387] [2022-02-24 04:17:07,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:07,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:17:07,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:07,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:17:07,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:17:07,115 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) [2022-02-24 04:17:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:09,179 INFO L93 Difference]: Finished difference Result 637 states and 783 transitions. [2022-02-24 04:17:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:17:09,180 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 [2022-02-24 04:17:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:09,182 INFO L225 Difference]: With dead ends: 637 [2022-02-24 04:17:09,182 INFO L226 Difference]: Without dead ends: 610 [2022-02-24 04:17:09,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:17:09,183 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1108 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:09,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2200 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 04:17:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-24 04:17:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-02-24 04:17:09,403 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) [2022-02-24 04:17:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 743 transitions. [2022-02-24 04:17:09,404 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 743 transitions. Word has length 71 [2022-02-24 04:17:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:09,405 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 743 transitions. [2022-02-24 04:17:09,405 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) [2022-02-24 04:17:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 743 transitions. [2022-02-24 04:17:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:17:09,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:09,406 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] [2022-02-24 04:17:09,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 04:17:09,406 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-02-24 04:17:09,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:09,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829491226] [2022-02-24 04:17:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:09,409 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:17:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:09,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:09,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829491226] [2022-02-24 04:17:09,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829491226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:09,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:09,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:17:09,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564498409] [2022-02-24 04:17:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:09,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:17:09,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:17:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:17:09,607 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) [2022-02-24 04:17:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:10,883 INFO L93 Difference]: Finished difference Result 644 states and 782 transitions. [2022-02-24 04:17:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:10,883 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 [2022-02-24 04:17:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:10,885 INFO L225 Difference]: With dead ends: 644 [2022-02-24 04:17:10,885 INFO L226 Difference]: Without dead ends: 599 [2022-02-24 04:17:10,886 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 [2022-02-24 04:17:10,886 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:10,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1087 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:17:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-24 04:17:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-02-24 04:17:11,026 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) [2022-02-24 04:17:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 733 transitions. [2022-02-24 04:17:11,027 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 733 transitions. Word has length 71 [2022-02-24 04:17:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 733 transitions. [2022-02-24 04:17:11,027 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) [2022-02-24 04:17:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 733 transitions. [2022-02-24 04:17:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:17:11,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:11,028 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] [2022-02-24 04:17:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 04:17:11,029 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-02-24 04:17:11,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:11,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157658321] [2022-02-24 04:17:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:11,030 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:17:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:11,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:11,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157658321] [2022-02-24 04:17:11,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157658321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:11,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:11,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:17:11,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414003468] [2022-02-24 04:17:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:11,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:17:11,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:17:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:17:11,231 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) [2022-02-24 04:17:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:12,306 INFO L93 Difference]: Finished difference Result 637 states and 772 transitions. [2022-02-24 04:17:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:12,306 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 [2022-02-24 04:17:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:12,308 INFO L225 Difference]: With dead ends: 637 [2022-02-24 04:17:12,308 INFO L226 Difference]: Without dead ends: 593 [2022-02-24 04:17:12,309 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 [2022-02-24 04:17:12,309 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 623 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:12,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 949 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:17:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-24 04:17:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-02-24 04:17:12,472 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) [2022-02-24 04:17:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 725 transitions. [2022-02-24 04:17:12,473 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 725 transitions. Word has length 71 [2022-02-24 04:17:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:12,473 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 725 transitions. [2022-02-24 04:17:12,474 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) [2022-02-24 04:17:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 725 transitions. [2022-02-24 04:17:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:17:12,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:12,475 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] [2022-02-24 04:17:12,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 04:17:12,475 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:12,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-02-24 04:17:12,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:12,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750875426] [2022-02-24 04:17:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:12,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:12,478 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:17:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:12,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:12,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750875426] [2022-02-24 04:17:12,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750875426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:12,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:12,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:17:12,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299375530] [2022-02-24 04:17:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:17:12,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:17:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:17:12,675 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) [2022-02-24 04:17:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:13,716 INFO L93 Difference]: Finished difference Result 631 states and 764 transitions. [2022-02-24 04:17:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:13,716 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 [2022-02-24 04:17:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:13,717 INFO L225 Difference]: With dead ends: 631 [2022-02-24 04:17:13,717 INFO L226 Difference]: Without dead ends: 581 [2022-02-24 04:17:13,718 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 [2022-02-24 04:17:13,718 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 632 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:13,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 886 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:17:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-24 04:17:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-02-24 04:17:13,870 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) [2022-02-24 04:17:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 707 transitions. [2022-02-24 04:17:13,871 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 707 transitions. Word has length 73 [2022-02-24 04:17:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:13,871 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 707 transitions. [2022-02-24 04:17:13,871 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) [2022-02-24 04:17:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 707 transitions. [2022-02-24 04:17:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:17:13,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:13,872 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] [2022-02-24 04:17:13,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 04:17:13,872 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-02-24 04:17:13,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:13,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820805761] [2022-02-24 04:17:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:13,874 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:13,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:13,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:14,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:14,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:17:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:14,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:14,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820805761] [2022-02-24 04:17:14,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [820805761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:14,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:14,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:17:14,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958025549] [2022-02-24 04:17:14,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:14,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:17:14,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:17:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:17:14,197 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) [2022-02-24 04:17:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:17,733 INFO L93 Difference]: Finished difference Result 1245 states and 1510 transitions. [2022-02-24 04:17:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 04:17:17,733 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 [2022-02-24 04:17:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:17,736 INFO L225 Difference]: With dead ends: 1245 [2022-02-24 04:17:17,736 INFO L226 Difference]: Without dead ends: 1100 [2022-02-24 04:17:17,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 04:17:17,737 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 2001 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:17,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1198 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 04:17:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-02-24 04:17:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 892. [2022-02-24 04:17:17,960 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) [2022-02-24 04:17:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1103 transitions. [2022-02-24 04:17:17,961 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1103 transitions. Word has length 73 [2022-02-24 04:17:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:17,961 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1103 transitions. [2022-02-24 04:17:17,962 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) [2022-02-24 04:17:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1103 transitions. [2022-02-24 04:17:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:17:17,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:17,963 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] [2022-02-24 04:17:17,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 04:17:17,963 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-02-24 04:17:17,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:17,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691893869] [2022-02-24 04:17:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:17,965 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:17:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:18,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:18,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691893869] [2022-02-24 04:17:18,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691893869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:18,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:18,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:17:18,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95078808] [2022-02-24 04:17:18,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:18,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:17:18,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:17:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:17:18,199 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) [2022-02-24 04:17:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:20,143 INFO L93 Difference]: Finished difference Result 1149 states and 1395 transitions. [2022-02-24 04:17:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:17:20,144 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 [2022-02-24 04:17:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:20,146 INFO L225 Difference]: With dead ends: 1149 [2022-02-24 04:17:20,146 INFO L226 Difference]: Without dead ends: 1044 [2022-02-24 04:17:20,147 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 [2022-02-24 04:17:20,147 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2826 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:20,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 1160 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 04:17:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-02-24 04:17:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 985. [2022-02-24 04:17:20,502 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) [2022-02-24 04:17:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1215 transitions. [2022-02-24 04:17:20,503 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1215 transitions. Word has length 73 [2022-02-24 04:17:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:20,504 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1215 transitions. [2022-02-24 04:17:20,504 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) [2022-02-24 04:17:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1215 transitions. [2022-02-24 04:17:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:17:20,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:20,505 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] [2022-02-24 04:17:20,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 04:17:20,505 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-02-24 04:17:20,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:20,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034678132] [2022-02-24 04:17:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:20,507 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-24 04:17:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:20,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:20,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034678132] [2022-02-24 04:17:20,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034678132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:20,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:20,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:17:20,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100138487] [2022-02-24 04:17:20,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:20,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:17:20,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:17:20,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:17:20,814 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) [2022-02-24 04:17:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:22,817 INFO L93 Difference]: Finished difference Result 1017 states and 1250 transitions. [2022-02-24 04:17:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:17:22,817 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 [2022-02-24 04:17:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:22,819 INFO L225 Difference]: With dead ends: 1017 [2022-02-24 04:17:22,819 INFO L226 Difference]: Without dead ends: 981 [2022-02-24 04:17:22,820 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 [2022-02-24 04:17:22,820 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 565 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:22,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2184 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 04:17:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-24 04:17:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-02-24 04:17:23,141 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) [2022-02-24 04:17:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1209 transitions. [2022-02-24 04:17:23,142 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1209 transitions. Word has length 77 [2022-02-24 04:17:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:23,142 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1209 transitions. [2022-02-24 04:17:23,143 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) [2022-02-24 04:17:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1209 transitions. [2022-02-24 04:17:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:17:23,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:23,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:17:23,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 04:17:23,145 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 1 times [2022-02-24 04:17:23,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:23,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991356087] [2022-02-24 04:17:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:23,147 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-24 04:17:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:23,369 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:23,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991356087] [2022-02-24 04:17:23,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991356087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:23,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:23,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:17:23,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865919458] [2022-02-24 04:17:23,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:23,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:17:23,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:17:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:17:23,371 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) [2022-02-24 04:17:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:24,676 INFO L93 Difference]: Finished difference Result 1034 states and 1265 transitions. [2022-02-24 04:17:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:24,676 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 [2022-02-24 04:17:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:24,678 INFO L225 Difference]: With dead ends: 1034 [2022-02-24 04:17:24,678 INFO L226 Difference]: Without dead ends: 947 [2022-02-24 04:17:24,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:17:24,679 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 520 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:24,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1099 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:17:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-02-24 04:17:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-02-24 04:17:24,927 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) [2022-02-24 04:17:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1157 transitions. [2022-02-24 04:17:24,929 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1157 transitions. Word has length 78 [2022-02-24 04:17:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:24,929 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1157 transitions. [2022-02-24 04:17:24,929 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) [2022-02-24 04:17:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1157 transitions. [2022-02-24 04:17:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 04:17:24,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:24,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:17:24,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 04:17:24,931 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-02-24 04:17:24,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:24,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423153230] [2022-02-24 04:17:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:24,933 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:24,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:17:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:17:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:25,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:25,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423153230] [2022-02-24 04:17:25,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [423153230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:25,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:25,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:17:25,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728974839] [2022-02-24 04:17:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:25,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:17:25,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:25,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:17:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:17:25,142 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) [2022-02-24 04:17:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:26,393 INFO L93 Difference]: Finished difference Result 976 states and 1185 transitions. [2022-02-24 04:17:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:26,393 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 [2022-02-24 04:17:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:26,395 INFO L225 Difference]: With dead ends: 976 [2022-02-24 04:17:26,395 INFO L226 Difference]: Without dead ends: 899 [2022-02-24 04:17:26,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:17:26,396 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 203 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:26,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1048 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:17:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-02-24 04:17:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-02-24 04:17:26,631 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) [2022-02-24 04:17:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1095 transitions. [2022-02-24 04:17:26,633 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1095 transitions. Word has length 75 [2022-02-24 04:17:26,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:26,633 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1095 transitions. [2022-02-24 04:17:26,633 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) [2022-02-24 04:17:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1095 transitions. [2022-02-24 04:17:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:17:26,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:26,635 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] [2022-02-24 04:17:26,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 04:17:26,635 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-02-24 04:17:26,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:26,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828305802] [2022-02-24 04:17:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:26,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:26,637 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:17:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 04:17:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:26,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:26,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828305802] [2022-02-24 04:17:26,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828305802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:26,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:26,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:26,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337680217] [2022-02-24 04:17:26,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:26,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:26,802 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) [2022-02-24 04:17:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:27,708 INFO L93 Difference]: Finished difference Result 944 states and 1143 transitions. [2022-02-24 04:17:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:27,708 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 [2022-02-24 04:17:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:27,711 INFO L225 Difference]: With dead ends: 944 [2022-02-24 04:17:27,711 INFO L226 Difference]: Without dead ends: 883 [2022-02-24 04:17:27,711 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 [2022-02-24 04:17:27,712 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 307 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-02-24 04:17:27,712 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] [2022-02-24 04:17:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-02-24 04:17:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-02-24 04:17:28,013 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) [2022-02-24 04:17:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1071 transitions. [2022-02-24 04:17:28,014 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1071 transitions. Word has length 73 [2022-02-24 04:17:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1071 transitions. [2022-02-24 04:17:28,014 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) [2022-02-24 04:17:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1071 transitions. [2022-02-24 04:17:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:17:28,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:28,016 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] [2022-02-24 04:17:28,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 04:17:28,017 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-02-24 04:17:28,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:28,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534419989] [2022-02-24 04:17:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:28,019 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-24 04:17:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-24 04:17:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:28,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:28,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534419989] [2022-02-24 04:17:28,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [534419989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:28,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:28,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:17:28,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542500677] [2022-02-24 04:17:28,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:28,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:17:28,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:17:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:17:28,267 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) [2022-02-24 04:17:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:29,463 INFO L93 Difference]: Finished difference Result 1161 states and 1426 transitions. [2022-02-24 04:17:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:17:29,463 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 [2022-02-24 04:17:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:29,466 INFO L225 Difference]: With dead ends: 1161 [2022-02-24 04:17:29,466 INFO L226 Difference]: Without dead ends: 869 [2022-02-24 04:17:29,467 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 [2022-02-24 04:17:29,467 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 622 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:29,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 959 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:17:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-02-24 04:17:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-02-24 04:17:29,778 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) [2022-02-24 04:17:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1049 transitions. [2022-02-24 04:17:29,779 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1049 transitions. Word has length 77 [2022-02-24 04:17:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1049 transitions. [2022-02-24 04:17:29,780 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) [2022-02-24 04:17:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1049 transitions. [2022-02-24 04:17:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 04:17:29,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:29,782 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] [2022-02-24 04:17:29,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 04:17:29,783 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-02-24 04:17:29,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:29,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584733196] [2022-02-24 04:17:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:29,786 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 04:17:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-24 04:17:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-24 04:17:29,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:29,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584733196] [2022-02-24 04:17:29,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584733196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:29,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:29,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:29,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253162837] [2022-02-24 04:17:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:29,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:29,992 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) [2022-02-24 04:17:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:30,824 INFO L93 Difference]: Finished difference Result 914 states and 1097 transitions. [2022-02-24 04:17:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:17:30,824 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 [2022-02-24 04:17:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:30,826 INFO L225 Difference]: With dead ends: 914 [2022-02-24 04:17:30,826 INFO L226 Difference]: Without dead ends: 849 [2022-02-24 04:17:30,827 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 [2022-02-24 04:17:30,827 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:30,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 858 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:17:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-24 04:17:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-02-24 04:17:31,034 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) [2022-02-24 04:17:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1021 transitions. [2022-02-24 04:17:31,035 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1021 transitions. Word has length 75 [2022-02-24 04:17:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:31,036 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1021 transitions. [2022-02-24 04:17:31,036 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) [2022-02-24 04:17:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1021 transitions. [2022-02-24 04:17:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 04:17:31,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:31,038 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] [2022-02-24 04:17:31,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 04:17:31,038 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-02-24 04:17:31,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:31,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432901766] [2022-02-24 04:17:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:31,041 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:17:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:17:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-24 04:17:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-24 04:17:31,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:31,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432901766] [2022-02-24 04:17:31,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432901766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:31,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:31,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:31,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300191349] [2022-02-24 04:17:31,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:31,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:31,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:31,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:31,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:31,233 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) [2022-02-24 04:17:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:32,131 INFO L93 Difference]: Finished difference Result 883 states and 1053 transitions. [2022-02-24 04:17:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:17:32,131 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 [2022-02-24 04:17:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:32,133 INFO L225 Difference]: With dead ends: 883 [2022-02-24 04:17:32,133 INFO L226 Difference]: Without dead ends: 788 [2022-02-24 04:17:32,134 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 [2022-02-24 04:17:32,134 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 257 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 787 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:17:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-24 04:17:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-02-24 04:17:32,322 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) [2022-02-24 04:17:32,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 951 transitions. [2022-02-24 04:17:32,323 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 951 transitions. Word has length 77 [2022-02-24 04:17:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:32,324 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 951 transitions. [2022-02-24 04:17:32,324 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) [2022-02-24 04:17:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 951 transitions. [2022-02-24 04:17:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 04:17:32,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:32,325 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] [2022-02-24 04:17:32,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 04:17:32,325 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-02-24 04:17:32,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:32,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811885511] [2022-02-24 04:17:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:32,327 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-24 04:17:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:17:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:32,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:32,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811885511] [2022-02-24 04:17:32,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811885511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:32,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:32,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:17:32,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15733902] [2022-02-24 04:17:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:32,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:17:32,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:17:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:17:32,537 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) [2022-02-24 04:17:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:33,369 INFO L93 Difference]: Finished difference Result 1066 states and 1306 transitions. [2022-02-24 04:17:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:17:33,369 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 [2022-02-24 04:17:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:33,371 INFO L225 Difference]: With dead ends: 1066 [2022-02-24 04:17:33,371 INFO L226 Difference]: Without dead ends: 788 [2022-02-24 04:17:33,371 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 [2022-02-24 04:17:33,372 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 [2022-02-24 04:17:33,372 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] [2022-02-24 04:17:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-24 04:17:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-02-24 04:17:33,553 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) [2022-02-24 04:17:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 949 transitions. [2022-02-24 04:17:33,554 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 949 transitions. Word has length 81 [2022-02-24 04:17:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:33,554 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 949 transitions. [2022-02-24 04:17:33,554 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) [2022-02-24 04:17:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 949 transitions. [2022-02-24 04:17:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 04:17:33,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:33,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:17:33,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 04:17:33,556 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-02-24 04:17:33,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:33,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241826317] [2022-02-24 04:17:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:33,558 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:17:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:33,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:33,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241826317] [2022-02-24 04:17:33,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [241826317] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:33,849 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:33,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:17:33,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32696157] [2022-02-24 04:17:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:33,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:17:33,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:17:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:17:33,850 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) [2022-02-24 04:17:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:35,757 INFO L93 Difference]: Finished difference Result 833 states and 994 transitions. [2022-02-24 04:17:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 04:17:35,757 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 [2022-02-24 04:17:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:35,759 INFO L225 Difference]: With dead ends: 833 [2022-02-24 04:17:35,759 INFO L226 Difference]: Without dead ends: 700 [2022-02-24 04:17:35,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 04:17:35,759 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 886 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:35,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1546 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 04:17:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-24 04:17:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 359. [2022-02-24 04:17:35,862 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) [2022-02-24 04:17:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2022-02-24 04:17:35,863 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 78 [2022-02-24 04:17:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:35,863 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2022-02-24 04:17:35,863 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) [2022-02-24 04:17:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2022-02-24 04:17:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:17:35,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:35,864 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] [2022-02-24 04:17:35,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 04:17:35,864 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-02-24 04:17:35,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:35,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308149357] [2022-02-24 04:17:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:35,866 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:35,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:35,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:17:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:36,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:17:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:36,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:17:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:36,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:17:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:36,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:36,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308149357] [2022-02-24 04:17:36,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308149357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:36,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:36,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:17:36,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704089652] [2022-02-24 04:17:36,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:36,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:17:36,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:17:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:17:36,162 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) [2022-02-24 04:17:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:36,947 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2022-02-24 04:17:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:17:36,948 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 [2022-02-24 04:17:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:36,948 INFO L225 Difference]: With dead ends: 361 [2022-02-24 04:17:36,948 INFO L226 Difference]: Without dead ends: 282 [2022-02-24 04:17:36,949 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 [2022-02-24 04:17:36,949 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:36,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1510 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:17:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-24 04:17:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-02-24 04:17:37,022 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) [2022-02-24 04:17:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 342 transitions. [2022-02-24 04:17:37,023 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 342 transitions. Word has length 79 [2022-02-24 04:17:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 342 transitions. [2022-02-24 04:17:37,023 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) [2022-02-24 04:17:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 342 transitions. [2022-02-24 04:17:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 04:17:37,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:37,023 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] [2022-02-24 04:17:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 04:17:37,024 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-02-24 04:17:37,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:37,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383354139] [2022-02-24 04:17:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:37,025 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-24 04:17:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:37,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:37,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383354139] [2022-02-24 04:17:37,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383354139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:37,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:37,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:37,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242453180] [2022-02-24 04:17:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:37,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:37,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:37,194 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) [2022-02-24 04:17:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:37,659 INFO L93 Difference]: Finished difference Result 365 states and 428 transitions. [2022-02-24 04:17:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:17:37,660 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 [2022-02-24 04:17:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:37,660 INFO L225 Difference]: With dead ends: 365 [2022-02-24 04:17:37,661 INFO L226 Difference]: Without dead ends: 279 [2022-02-24 04:17:37,661 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 [2022-02-24 04:17:37,661 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:37,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 674 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:17:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-24 04:17:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 235. [2022-02-24 04:17:37,729 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) [2022-02-24 04:17:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 267 transitions. [2022-02-24 04:17:37,729 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 267 transitions. Word has length 83 [2022-02-24 04:17:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 267 transitions. [2022-02-24 04:17:37,729 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) [2022-02-24 04:17:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 267 transitions. [2022-02-24 04:17:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 04:17:37,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:37,730 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] [2022-02-24 04:17:37,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 04:17:37,730 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-02-24 04:17:37,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:37,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819495928] [2022-02-24 04:17:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:37,733 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 04:17:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:38,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:38,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819495928] [2022-02-24 04:17:38,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819495928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:38,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:38,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:17:38,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672294449] [2022-02-24 04:17:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:38,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:17:38,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:17:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:17:38,011 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) [2022-02-24 04:17:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:38,687 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-02-24 04:17:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:17:38,687 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 [2022-02-24 04:17:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:38,688 INFO L225 Difference]: With dead ends: 287 [2022-02-24 04:17:38,688 INFO L226 Difference]: Without dead ends: 255 [2022-02-24 04:17:38,688 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 [2022-02-24 04:17:38,688 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 [2022-02-24 04:17:38,688 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] [2022-02-24 04:17:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-24 04:17:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2022-02-24 04:17:38,749 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) [2022-02-24 04:17:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-02-24 04:17:38,749 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 99 [2022-02-24 04:17:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-02-24 04:17:38,749 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) [2022-02-24 04:17:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-02-24 04:17:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 04:17:38,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:38,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:17:38,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 04:17:38,750 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-02-24 04:17:38,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:38,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925144942] [2022-02-24 04:17:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:38,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:38,752 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:38,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:17:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:39,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:39,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925144942] [2022-02-24 04:17:39,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925144942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:39,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:39,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:17:39,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687817872] [2022-02-24 04:17:39,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:39,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:17:39,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:17:39,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:17:39,046 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) [2022-02-24 04:17:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:40,689 INFO L93 Difference]: Finished difference Result 508 states and 570 transitions. [2022-02-24 04:17:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 04:17:40,689 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 [2022-02-24 04:17:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:40,691 INFO L225 Difference]: With dead ends: 508 [2022-02-24 04:17:40,691 INFO L226 Difference]: Without dead ends: 399 [2022-02-24 04:17:40,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 04:17:40,692 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 633 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:40,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 952 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:17:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-24 04:17:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 349. [2022-02-24 04:17:40,784 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) [2022-02-24 04:17:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2022-02-24 04:17:40,784 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 101 [2022-02-24 04:17:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2022-02-24 04:17:40,785 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) [2022-02-24 04:17:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2022-02-24 04:17:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 04:17:40,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:40,785 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] [2022-02-24 04:17:40,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 04:17:40,786 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-02-24 04:17:40,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:40,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076510686] [2022-02-24 04:17:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:40,788 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:40,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:40,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:40,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:17:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:17:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:41,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:41,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076510686] [2022-02-24 04:17:41,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076510686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:41,066 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:41,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 04:17:41,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496343991] [2022-02-24 04:17:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:41,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 04:17:41,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 04:17:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:17:41,067 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) [2022-02-24 04:17:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:41,642 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2022-02-24 04:17:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:17:41,642 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 [2022-02-24 04:17:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:41,643 INFO L225 Difference]: With dead ends: 367 [2022-02-24 04:17:41,643 INFO L226 Difference]: Without dead ends: 261 [2022-02-24 04:17:41,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:17:41,644 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 59 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:41,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1040 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:17:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-24 04:17:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 146. [2022-02-24 04:17:41,687 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) [2022-02-24 04:17:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-02-24 04:17:41,688 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 101 [2022-02-24 04:17:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:41,688 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-02-24 04:17:41,688 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) [2022-02-24 04:17:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-02-24 04:17:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 04:17:41,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:41,689 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] [2022-02-24 04:17:41,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 04:17:41,689 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 1 times [2022-02-24 04:17:41,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:41,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859614894] [2022-02-24 04:17:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:41,691 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:17:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 04:17:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 04:17:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:41,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:41,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859614894] [2022-02-24 04:17:41,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859614894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:41,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:41,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:17:41,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922078996] [2022-02-24 04:17:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:17:41,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:17:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:17:41,887 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) [2022-02-24 04:17:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:42,214 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-02-24 04:17:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:17:42,215 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 [2022-02-24 04:17:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:42,215 INFO L225 Difference]: With dead ends: 192 [2022-02-24 04:17:42,215 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 04:17:42,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:17:42,216 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 147 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:42,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 422 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:17:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 04:17:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-02-24 04:17:42,268 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) [2022-02-24 04:17:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-02-24 04:17:42,268 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 116 [2022-02-24 04:17:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:42,268 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-02-24 04:17:42,269 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) [2022-02-24 04:17:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-02-24 04:17:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 04:17:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:42,269 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] [2022-02-24 04:17:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 04:17:42,269 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-02-24 04:17:42,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:42,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153640732] [2022-02-24 04:17:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:42,271 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:17:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 04:17:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 04:17:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:42,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:42,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153640732] [2022-02-24 04:17:42,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [153640732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:42,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:42,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 04:17:42,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708451762] [2022-02-24 04:17:42,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:42,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 04:17:42,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 04:17:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:17:42,537 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) [2022-02-24 04:17:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:43,351 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-02-24 04:17:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 04:17:43,351 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 [2022-02-24 04:17:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:43,352 INFO L225 Difference]: With dead ends: 292 [2022-02-24 04:17:43,352 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 04:17:43,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 04:17:43,353 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 254 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:43,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 377 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:17:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 04:17:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-24 04:17:43,405 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) [2022-02-24 04:17:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-02-24 04:17:43,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-02-24 04:17:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:43,406 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-02-24 04:17:43,406 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) [2022-02-24 04:17:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-02-24 04:17:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 04:17:43,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:17:43,407 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] [2022-02-24 04:17:43,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 04:17:43,407 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:17:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:17:43,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-02-24 04:17:43,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:17:43,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080102976] [2022-02-24 04:17:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:17:43,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:17:43,410 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:17:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:17:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:17:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:17:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:17:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:17:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:17:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:17:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 04:17:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:17:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-24 04:17:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-24 04:17:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:17:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:17:43,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:17:43,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080102976] [2022-02-24 04:17:43,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080102976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:17:43,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:17:43,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:17:43,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269802935] [2022-02-24 04:17:43,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:17:43,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:17:43,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:17:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:17:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:17:43,750 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) [2022-02-24 04:17:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:17:44,352 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-02-24 04:17:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:17:44,353 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 [2022-02-24 04:17:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:17:44,353 INFO L225 Difference]: With dead ends: 152 [2022-02-24 04:17:44,353 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 04:17:44,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-24 04:17:44,354 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 271 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:17:44,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 332 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:17:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 04:17:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 04:17:44,355 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) [2022-02-24 04:17:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 04:17:44,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-02-24 04:17:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:17:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 04:17:44,355 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) [2022-02-24 04:17:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 04:17:44,355 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 04:17:44,358 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:17:44,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 04:17:44,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.