/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:42:11,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:42:11,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:42:11,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:42:11,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:42:11,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:42:11,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:42:11,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:42:11,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:42:11,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:42:11,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:42:11,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:42:11,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:42:11,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:42:11,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:42:11,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:42:11,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:42:11,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:42:11,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:42:11,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:42:11,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:42:11,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:42:11,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:42:11,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:42:11,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:42:11,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:42:11,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:42:11,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:42:11,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:42:11,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:42:11,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:42:11,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:42:11,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:42:11,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:42:11,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:42:11,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:42:11,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:42:11,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:42:11,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:42:11,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:42:11,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:42:11,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:42:12,004 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:42:12,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:42:12,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:42:12,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:42:12,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:12,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:42:12,007 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:42:12,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:42:12,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:42:12,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:42:12,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:42:12,201 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:42:12,201 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:42:12,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-01-31 23:42:12,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729471f60/f9f2c0d24dd644c6a465a2f292a09016/FLAG08560d870 [2022-01-31 23:42:12,642 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:42:12,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-01-31 23:42:12,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729471f60/f9f2c0d24dd644c6a465a2f292a09016/FLAG08560d870 [2022-01-31 23:42:12,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729471f60/f9f2c0d24dd644c6a465a2f292a09016 [2022-01-31 23:42:12,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:42:12,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:42:12,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:12,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:42:12,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:42:12,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:12" (1/1) ... [2022-01-31 23:42:12,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e17b0be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:12, skipping insertion in model container [2022-01-31 23:42:12,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:12" (1/1) ... [2022-01-31 23:42:12,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:42:12,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:42:12,883 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-1.c[2074,2087] [2022-01-31 23:42:13,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:13,067 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:42:13,076 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-1.c[2074,2087] [2022-01-31 23:42:13,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:13,149 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:42:13,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13 WrapperNode [2022-01-31 23:42:13,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:13,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:42:13,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:42:13,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:42:13,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:42:13,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:42:13,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:42:13,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:42:13,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (1/1) ... [2022-01-31 23:42:13,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:42:13,254 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) [2022-01-31 23:42:13,260 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 [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-01-31 23:42:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-01-31 23:42:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-01-31 23:42:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-01-31 23:42:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-01-31 23:42:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-01-31 23:42:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-01-31 23:42:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-01-31 23:42:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-01-31 23:42:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:42:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:42:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:42:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:42:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:42:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:42:13,540 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:42:13,541 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:42:13,639 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,690 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-01-31 23:42:13,690 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-01-31 23:42:13,693 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,714 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-01-31 23:42:13,714 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-01-31 23:42:13,737 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,746 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-01-31 23:42:13,746 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-01-31 23:42:13,809 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,843 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-01-31 23:42:13,844 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-01-31 23:42:13,844 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-01-31 23:42:13,847 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,993 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-01-31 23:42:13,993 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-01-31 23:42:13,994 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,010 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-01-31 23:42:14,010 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-01-31 23:42:14,034 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,051 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-01-31 23:42:14,052 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-01-31 23:42:14,054 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,169 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-01-31 23:42:14,169 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-01-31 23:42:14,177 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,181 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-01-31 23:42:14,181 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-01-31 23:42:14,202 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:42:14,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:42:14,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:42:14,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:14 BoogieIcfgContainer [2022-01-31 23:42:14,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:42:14,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:42:14,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:42:14,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:42:14,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:42:12" (1/3) ... [2022-01-31 23:42:14,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2c6cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:14, skipping insertion in model container [2022-01-31 23:42:14,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13" (2/3) ... [2022-01-31 23:42:14,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2c6cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:42:14, skipping insertion in model container [2022-01-31 23:42:14,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:14" (3/3) ... [2022-01-31 23:42:14,232 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2022-01-31 23:42:14,237 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:42:14,237 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:42:14,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:42:14,274 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 [2022-01-31 23:42:14,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:42:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 23:42:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 23:42:14,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:14,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:14,303 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 1 times [2022-01-31 23:42:14,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574231423] [2022-01-31 23:42:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:14,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:14,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:14,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574231423] [2022-01-31 23:42:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574231423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:14,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:14,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 23:42:14,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110384111] [2022-01-31 23:42:14,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:14,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 23:42:14,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 23:42:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:42:14,720 INFO L87 Difference]: Start difference. First operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) 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) [2022-01-31 23:42:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:16,549 INFO L93 Difference]: Finished difference Result 1047 states and 1683 transitions. [2022-01-31 23:42:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:16,551 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 [2022-01-31 23:42:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:16,572 INFO L225 Difference]: With dead ends: 1047 [2022-01-31 23:42:16,572 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 23:42:16,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:16,583 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 399 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:16,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1013 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:42:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 23:42:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2022-01-31 23:42:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 378 states have (on average 1.4576719576719577) internal successors, (551), 397 states have internal predecessors, (551), 103 states have call successors, (103), 29 states have call predecessors, (103), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-31 23:42:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 740 transitions. [2022-01-31 23:42:16,680 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 740 transitions. Word has length 20 [2022-01-31 23:42:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:16,680 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 740 transitions. [2022-01-31 23:42:16,680 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) [2022-01-31 23:42:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 740 transitions. [2022-01-31 23:42:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:16,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:16,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:16,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:42:16,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 1 times [2022-01-31 23:42:16,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:16,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716148447] [2022-01-31 23:42:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:16,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:16,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:16,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716148447] [2022-01-31 23:42:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716148447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:16,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:16,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455253051] [2022-01-31 23:42:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:16,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:16,839 INFO L87 Difference]: Start difference. First operand 509 states and 740 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) [2022-01-31 23:42:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:18,133 INFO L93 Difference]: Finished difference Result 967 states and 1429 transitions. [2022-01-31 23:42:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:18,134 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 [2022-01-31 23:42:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:18,140 INFO L225 Difference]: With dead ends: 967 [2022-01-31 23:42:18,140 INFO L226 Difference]: Without dead ends: 846 [2022-01-31 23:42:18,141 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 [2022-01-31 23:42:18,142 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 1498 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:18,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1023 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:42:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-31 23:42:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 664. [2022-01-31 23:42:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 502 states have (on average 1.408366533864542) internal successors, (707), 510 states have internal predecessors, (707), 112 states have call successors, (112), 40 states have call predecessors, (112), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-01-31 23:42:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 964 transitions. [2022-01-31 23:42:18,233 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 964 transitions. Word has length 25 [2022-01-31 23:42:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 964 transitions. [2022-01-31 23:42:18,233 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) [2022-01-31 23:42:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 964 transitions. [2022-01-31 23:42:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:42:18,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:18,235 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] [2022-01-31 23:42:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:42:18,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 1 times [2022-01-31 23:42:18,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398809982] [2022-01-31 23:42:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:18,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:18,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:18,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398809982] [2022-01-31 23:42:18,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398809982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:18,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:18,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:18,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27694631] [2022-01-31 23:42:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:18,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:18,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:18,390 INFO L87 Difference]: Start difference. First operand 664 states and 964 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) [2022-01-31 23:42:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:19,531 INFO L93 Difference]: Finished difference Result 1148 states and 1650 transitions. [2022-01-31 23:42:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:19,532 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 [2022-01-31 23:42:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:19,538 INFO L225 Difference]: With dead ends: 1148 [2022-01-31 23:42:19,538 INFO L226 Difference]: Without dead ends: 970 [2022-01-31 23:42:19,539 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 [2022-01-31 23:42:19,544 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1529 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 867 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:42:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-31 23:42:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 789. [2022-01-31 23:42:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 611 states have (on average 1.4042553191489362) internal successors, (858), 615 states have internal predecessors, (858), 114 states have call successors, (114), 46 states have call predecessors, (114), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-01-31 23:42:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1135 transitions. [2022-01-31 23:42:19,623 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1135 transitions. Word has length 30 [2022-01-31 23:42:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:19,624 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1135 transitions. [2022-01-31 23:42:19,624 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) [2022-01-31 23:42:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1135 transitions. [2022-01-31 23:42:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:42:19,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:19,636 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] [2022-01-31 23:42:19,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:42:19,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 1 times [2022-01-31 23:42:19,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:19,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626040201] [2022-01-31 23:42:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:19,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:19,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:19,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626040201] [2022-01-31 23:42:19,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [626040201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:19,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:19,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:19,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287008241] [2022-01-31 23:42:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:19,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:19,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:19,736 INFO L87 Difference]: Start difference. First operand 789 states and 1135 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) [2022-01-31 23:42:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:21,731 INFO L93 Difference]: Finished difference Result 1630 states and 2449 transitions. [2022-01-31 23:42:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:42:21,731 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 [2022-01-31 23:42:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:21,737 INFO L225 Difference]: With dead ends: 1630 [2022-01-31 23:42:21,737 INFO L226 Difference]: Without dead ends: 1344 [2022-01-31 23:42:21,738 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 [2022-01-31 23:42:21,742 INFO L933 BasicCegarLoop]: 1009 mSDtfsCounter, 1111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1265 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:42:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-01-31 23:42:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 907. [2022-01-31 23:42:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 708 states have (on average 1.4138418079096045) internal successors, (1001), 711 states have internal predecessors, (1001), 127 states have call successors, (127), 54 states have call predecessors, (127), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-01-31 23:42:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1348 transitions. [2022-01-31 23:42:21,819 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1348 transitions. Word has length 31 [2022-01-31 23:42:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:21,819 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1348 transitions. [2022-01-31 23:42:21,819 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) [2022-01-31 23:42:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1348 transitions. [2022-01-31 23:42:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:42:21,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:21,820 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] [2022-01-31 23:42:21,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:42:21,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 1 times [2022-01-31 23:42:21,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:21,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958086439] [2022-01-31 23:42:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:21,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:21,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:21,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:22,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958086439] [2022-01-31 23:42:22,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [958086439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:22,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:22,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:22,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814659324] [2022-01-31 23:42:22,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:22,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:22,015 INFO L87 Difference]: Start difference. First operand 907 states and 1348 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) [2022-01-31 23:42:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:23,868 INFO L93 Difference]: Finished difference Result 1632 states and 2483 transitions. [2022-01-31 23:42:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:23,868 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 [2022-01-31 23:42:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:23,873 INFO L225 Difference]: With dead ends: 1632 [2022-01-31 23:42:23,873 INFO L226 Difference]: Without dead ends: 1046 [2022-01-31 23:42:23,875 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 [2022-01-31 23:42:23,875 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 3365 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3371 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:23,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3371 Valid, 884 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:42:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-01-31 23:42:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 835. [2022-01-31 23:42:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 649 states have (on average 1.399075500770416) internal successors, (908), 653 states have internal predecessors, (908), 118 states have call successors, (118), 50 states have call predecessors, (118), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-01-31 23:42:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1203 transitions. [2022-01-31 23:42:23,957 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1203 transitions. Word has length 32 [2022-01-31 23:42:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:23,957 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1203 transitions. [2022-01-31 23:42:23,957 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) [2022-01-31 23:42:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1203 transitions. [2022-01-31 23:42:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:42:23,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:23,959 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] [2022-01-31 23:42:23,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:42:23,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 1 times [2022-01-31 23:42:23,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026165457] [2022-01-31 23:42:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:23,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:23,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:24,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026165457] [2022-01-31 23:42:24,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026165457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:24,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:24,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:24,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293798427] [2022-01-31 23:42:24,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:24,071 INFO L87 Difference]: Start difference. First operand 835 states and 1203 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) [2022-01-31 23:42:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:25,662 INFO L93 Difference]: Finished difference Result 965 states and 1425 transitions. [2022-01-31 23:42:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:25,663 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 [2022-01-31 23:42:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:25,667 INFO L225 Difference]: With dead ends: 965 [2022-01-31 23:42:25,667 INFO L226 Difference]: Without dead ends: 961 [2022-01-31 23:42:25,668 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 [2022-01-31 23:42:25,670 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 771 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:25,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 982 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:42:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-01-31 23:42:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 834. [2022-01-31 23:42:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 649 states have (on average 1.3959938366718028) internal successors, (906), 652 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) [2022-01-31 23:42:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1200 transitions. [2022-01-31 23:42:25,748 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1200 transitions. Word has length 36 [2022-01-31 23:42:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:25,749 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1200 transitions. [2022-01-31 23:42:25,749 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) [2022-01-31 23:42:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1200 transitions. [2022-01-31 23:42:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 23:42:25,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:25,751 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] [2022-01-31 23:42:25,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:42:25,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 1 times [2022-01-31 23:42:25,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:25,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473857944] [2022-01-31 23:42:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:25,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:25,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:25,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:25,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:25,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473857944] [2022-01-31 23:42:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473857944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:25,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537434023] [2022-01-31 23:42:25,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:25,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:25,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:25,894 INFO L87 Difference]: Start difference. First operand 834 states and 1200 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) [2022-01-31 23:42:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:27,687 INFO L93 Difference]: Finished difference Result 1417 states and 2024 transitions. [2022-01-31 23:42:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:27,688 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 [2022-01-31 23:42:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:27,691 INFO L225 Difference]: With dead ends: 1417 [2022-01-31 23:42:27,691 INFO L226 Difference]: Without dead ends: 999 [2022-01-31 23:42:27,692 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 [2022-01-31 23:42:27,694 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1494 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:27,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1252 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-01-31 23:42:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2022-01-31 23:42:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 571 states have (on average 1.3870402802101576) internal successors, (792), 575 states have internal predecessors, (792), 106 states have call successors, (106), 45 states have call predecessors, (106), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-01-31 23:42:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1029 transitions. [2022-01-31 23:42:27,778 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1029 transitions. Word has length 39 [2022-01-31 23:42:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1029 transitions. [2022-01-31 23:42:27,778 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) [2022-01-31 23:42:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1029 transitions. [2022-01-31 23:42:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 23:42:27,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:27,780 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] [2022-01-31 23:42:27,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:42:27,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 1 times [2022-01-31 23:42:27,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178982778] [2022-01-31 23:42:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:27,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:27,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:27,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:27,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178982778] [2022-01-31 23:42:27,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178982778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:27,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:27,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:27,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804090009] [2022-01-31 23:42:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:27,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:27,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:27,898 INFO L87 Difference]: Start difference. First operand 736 states and 1029 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) [2022-01-31 23:42:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:29,420 INFO L93 Difference]: Finished difference Result 979 states and 1409 transitions. [2022-01-31 23:42:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:29,420 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 [2022-01-31 23:42:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:29,429 INFO L225 Difference]: With dead ends: 979 [2022-01-31 23:42:29,430 INFO L226 Difference]: Without dead ends: 959 [2022-01-31 23:42:29,430 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 [2022-01-31 23:42:29,430 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 1124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 773 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:42:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-31 23:42:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 762. [2022-01-31 23:42:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3983193277310924) internal successors, (832), 608 states have internal predecessors, (832), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-01-31 23:42:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1064 transitions. [2022-01-31 23:42:29,523 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1064 transitions. Word has length 40 [2022-01-31 23:42:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:29,524 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1064 transitions. [2022-01-31 23:42:29,524 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) [2022-01-31 23:42:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1064 transitions. [2022-01-31 23:42:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:42:29,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:29,527 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] [2022-01-31 23:42:29,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:42:29,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 1 times [2022-01-31 23:42:29,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173487302] [2022-01-31 23:42:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:29,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:29,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:42:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:29,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:29,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173487302] [2022-01-31 23:42:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173487302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:29,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:29,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:29,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744648293] [2022-01-31 23:42:29,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:29,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:29,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:29,634 INFO L87 Difference]: Start difference. First operand 762 states and 1064 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) [2022-01-31 23:42:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:30,866 INFO L93 Difference]: Finished difference Result 1167 states and 1671 transitions. [2022-01-31 23:42:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:30,888 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 [2022-01-31 23:42:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:30,892 INFO L225 Difference]: With dead ends: 1167 [2022-01-31 23:42:30,892 INFO L226 Difference]: Without dead ends: 942 [2022-01-31 23:42:30,892 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 [2022-01-31 23:42:30,893 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 1663 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:30,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1318 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:42:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-31 23:42:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 762. [2022-01-31 23:42:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3966386554621848) internal successors, (831), 608 states have internal predecessors, (831), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-01-31 23:42:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1063 transitions. [2022-01-31 23:42:30,997 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1063 transitions. Word has length 46 [2022-01-31 23:42:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:30,998 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1063 transitions. [2022-01-31 23:42:30,998 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) [2022-01-31 23:42:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1063 transitions. [2022-01-31 23:42:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 23:42:31,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:31,001 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] [2022-01-31 23:42:31,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:42:31,001 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 1 times [2022-01-31 23:42:31,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:31,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848436271] [2022-01-31 23:42:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:31,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:31,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 23:42:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:31,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:31,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848436271] [2022-01-31 23:42:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848436271] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:31,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:31,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487701618] [2022-01-31 23:42:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:31,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:31,120 INFO L87 Difference]: Start difference. First operand 762 states and 1063 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) [2022-01-31 23:42:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:32,475 INFO L93 Difference]: Finished difference Result 964 states and 1383 transitions. [2022-01-31 23:42:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:32,476 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 [2022-01-31 23:42:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:32,479 INFO L225 Difference]: With dead ends: 964 [2022-01-31 23:42:32,479 INFO L226 Difference]: Without dead ends: 897 [2022-01-31 23:42:32,480 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 [2022-01-31 23:42:32,480 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1507 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:32,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1140 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:42:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-31 23:42:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 751. [2022-01-31 23:42:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 588 states have (on average 1.3979591836734695) internal successors, (822), 601 states have internal predecessors, (822), 106 states have call successors, (106), 46 states have call predecessors, (106), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-01-31 23:42:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1050 transitions. [2022-01-31 23:42:32,597 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1050 transitions. Word has length 47 [2022-01-31 23:42:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:32,597 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1050 transitions. [2022-01-31 23:42:32,598 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) [2022-01-31 23:42:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1050 transitions. [2022-01-31 23:42:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 23:42:32,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:32,600 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] [2022-01-31 23:42:32,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:42:32,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 1 times [2022-01-31 23:42:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966284340] [2022-01-31 23:42:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:32,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:32,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:32,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:32,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966284340] [2022-01-31 23:42:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [966284340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:32,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:32,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:42:32,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763131132] [2022-01-31 23:42:32,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:32,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:42:32,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:42:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:42:32,749 INFO L87 Difference]: Start difference. First operand 751 states and 1050 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) [2022-01-31 23:42:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:35,033 INFO L93 Difference]: Finished difference Result 1067 states and 1515 transitions. [2022-01-31 23:42:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:42:35,033 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 [2022-01-31 23:42:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:35,036 INFO L225 Difference]: With dead ends: 1067 [2022-01-31 23:42:35,037 INFO L226 Difference]: Without dead ends: 1006 [2022-01-31 23:42:35,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:42:35,037 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 1821 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:35,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 1768 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:42:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-01-31 23:42:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 794. [2022-01-31 23:42:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 623 states have (on average 1.3964686998394864) internal successors, (870), 635 states have internal predecessors, (870), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-01-31 23:42:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-01-31 23:42:35,157 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 48 [2022-01-31 23:42:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:35,157 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-01-31 23:42:35,157 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) [2022-01-31 23:42:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-01-31 23:42:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:42:35,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:35,159 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] [2022-01-31 23:42:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:42:35,159 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 1 times [2022-01-31 23:42:35,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529020754] [2022-01-31 23:42:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:35,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:35,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:35,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529020754] [2022-01-31 23:42:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529020754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:35,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:42:35,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304281662] [2022-01-31 23:42:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:35,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:42:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:42:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:42:35,284 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 23:42:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:37,390 INFO L93 Difference]: Finished difference Result 952 states and 1368 transitions. [2022-01-31 23:42:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:42:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-01-31 23:42:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:37,393 INFO L225 Difference]: With dead ends: 952 [2022-01-31 23:42:37,393 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 23:42:37,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:42:37,394 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1180 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1456 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:42:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 23:42:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 797. [2022-01-31 23:42:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 626 states have (on average 1.3961661341853036) internal successors, (874), 638 states have internal predecessors, (874), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-01-31 23:42:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1115 transitions. [2022-01-31 23:42:37,523 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1115 transitions. Word has length 50 [2022-01-31 23:42:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:37,523 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 1115 transitions. [2022-01-31 23:42:37,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 23:42:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1115 transitions. [2022-01-31 23:42:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:42:37,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:37,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:37,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:42:37,525 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 1 times [2022-01-31 23:42:37,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833880925] [2022-01-31 23:42:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:37,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:37,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:37,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833880925] [2022-01-31 23:42:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833880925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:37,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:37,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:37,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594144243] [2022-01-31 23:42:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:37,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:37,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:37,668 INFO L87 Difference]: Start difference. First operand 797 states and 1115 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) [2022-01-31 23:42:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:39,862 INFO L93 Difference]: Finished difference Result 978 states and 1402 transitions. [2022-01-31 23:42:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:39,863 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 [2022-01-31 23:42:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:39,866 INFO L225 Difference]: With dead ends: 978 [2022-01-31 23:42:39,866 INFO L226 Difference]: Without dead ends: 914 [2022-01-31 23:42:39,867 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 [2022-01-31 23:42:39,867 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 1576 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:39,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1818 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:42:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-01-31 23:42:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 792. [2022-01-31 23:42:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 621 states have (on average 1.391304347826087) internal successors, (864), 633 states have internal predecessors, (864), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-01-31 23:42:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1105 transitions. [2022-01-31 23:42:39,997 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1105 transitions. Word has length 50 [2022-01-31 23:42:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:39,998 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1105 transitions. [2022-01-31 23:42:39,998 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) [2022-01-31 23:42:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1105 transitions. [2022-01-31 23:42:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:42:39,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:39,999 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] [2022-01-31 23:42:39,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:42:39,999 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 1 times [2022-01-31 23:42:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403733291] [2022-01-31 23:42:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:40,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:40,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:40,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403733291] [2022-01-31 23:42:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [403733291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:40,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281177879] [2022-01-31 23:42:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:40,129 INFO L87 Difference]: Start difference. First operand 792 states and 1105 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) [2022-01-31 23:42:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:41,497 INFO L93 Difference]: Finished difference Result 1090 states and 1555 transitions. [2022-01-31 23:42:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:42:41,497 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 [2022-01-31 23:42:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:41,500 INFO L225 Difference]: With dead ends: 1090 [2022-01-31 23:42:41,501 INFO L226 Difference]: Without dead ends: 1074 [2022-01-31 23:42:41,501 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 [2022-01-31 23:42:41,501 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 890 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:41,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1338 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:42:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-31 23:42:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 848. [2022-01-31 23:42:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 663 states have (on average 1.3725490196078431) internal successors, (910), 677 states have internal predecessors, (910), 112 states have call successors, (112), 51 states have call predecessors, (112), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-01-31 23:42:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1165 transitions. [2022-01-31 23:42:41,651 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1165 transitions. Word has length 50 [2022-01-31 23:42:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:41,652 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1165 transitions. [2022-01-31 23:42:41,652 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) [2022-01-31 23:42:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1165 transitions. [2022-01-31 23:42:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:42:41,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:41,653 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] [2022-01-31 23:42:41,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:42:41,654 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 1 times [2022-01-31 23:42:41,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:41,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911801621] [2022-01-31 23:42:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:41,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:41,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:41,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911801621] [2022-01-31 23:42:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911801621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:41,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:41,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:41,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917009706] [2022-01-31 23:42:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:41,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:41,791 INFO L87 Difference]: Start difference. First operand 848 states and 1165 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) [2022-01-31 23:42:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:43,025 INFO L93 Difference]: Finished difference Result 996 states and 1410 transitions. [2022-01-31 23:42:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:43,025 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 [2022-01-31 23:42:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:43,029 INFO L225 Difference]: With dead ends: 996 [2022-01-31 23:42:43,029 INFO L226 Difference]: Without dead ends: 991 [2022-01-31 23:42:43,029 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 [2022-01-31 23:42:43,029 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1190 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:43,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1168 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:42:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-31 23:42:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 867. [2022-01-31 23:42:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 679 states have (on average 1.369661266568483) internal successors, (930), 694 states have internal predecessors, (930), 113 states have call successors, (113), 52 states have call predecessors, (113), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-01-31 23:42:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1188 transitions. [2022-01-31 23:42:43,181 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1188 transitions. Word has length 52 [2022-01-31 23:42:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1188 transitions. [2022-01-31 23:42:43,181 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) [2022-01-31 23:42:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1188 transitions. [2022-01-31 23:42:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:42:43,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:43,183 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] [2022-01-31 23:42:43,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:42:43,183 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 1 times [2022-01-31 23:42:43,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088967223] [2022-01-31 23:42:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:43,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:43,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:42:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:42:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:43,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088967223] [2022-01-31 23:42:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088967223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:43,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:43,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:42:43,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548026910] [2022-01-31 23:42:43,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:43,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:42:43,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:42:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:42:43,282 INFO L87 Difference]: Start difference. First operand 867 states and 1188 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) [2022-01-31 23:42:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:45,020 INFO L93 Difference]: Finished difference Result 1203 states and 1692 transitions. [2022-01-31 23:42:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:45,021 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 [2022-01-31 23:42:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:45,024 INFO L225 Difference]: With dead ends: 1203 [2022-01-31 23:42:45,024 INFO L226 Difference]: Without dead ends: 956 [2022-01-31 23:42:45,025 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 [2022-01-31 23:42:45,025 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 700 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:45,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1175 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-31 23:42:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 836. [2022-01-31 23:42:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 655 states have (on average 1.369465648854962) internal successors, (897), 668 states have internal predecessors, (897), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-01-31 23:42:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1148 transitions. [2022-01-31 23:42:45,180 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1148 transitions. Word has length 54 [2022-01-31 23:42:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:45,180 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1148 transitions. [2022-01-31 23:42:45,180 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) [2022-01-31 23:42:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1148 transitions. [2022-01-31 23:42:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 23:42:45,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:45,182 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] [2022-01-31 23:42:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:42:45,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 1 times [2022-01-31 23:42:45,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:45,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520450196] [2022-01-31 23:42:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:45,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:45,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:45,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520450196] [2022-01-31 23:42:45,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520450196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:45,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:45,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:45,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742643263] [2022-01-31 23:42:45,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:45,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:45,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:45,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:45,331 INFO L87 Difference]: Start difference. First operand 836 states and 1148 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) [2022-01-31 23:42:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:47,223 INFO L93 Difference]: Finished difference Result 971 states and 1378 transitions. [2022-01-31 23:42:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:42:47,223 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 [2022-01-31 23:42:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:47,226 INFO L225 Difference]: With dead ends: 971 [2022-01-31 23:42:47,226 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 23:42:47,227 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 [2022-01-31 23:42:47,227 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 735 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:47,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2358 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:42:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 23:42:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 843. [2022-01-31 23:42:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 661 states have (on average 1.367624810892587) internal successors, (904), 675 states have internal predecessors, (904), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1157 transitions. [2022-01-31 23:42:47,389 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1157 transitions. Word has length 51 [2022-01-31 23:42:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:47,389 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1157 transitions. [2022-01-31 23:42:47,389 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) [2022-01-31 23:42:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1157 transitions. [2022-01-31 23:42:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 23:42:47,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:47,391 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] [2022-01-31 23:42:47,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:42:47,391 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 1 times [2022-01-31 23:42:47,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:47,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566586890] [2022-01-31 23:42:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:47,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:47,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:47,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566586890] [2022-01-31 23:42:47,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566586890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:47,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:47,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:47,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821940512] [2022-01-31 23:42:47,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:47,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:47,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:47,555 INFO L87 Difference]: Start difference. First operand 843 states and 1157 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) [2022-01-31 23:42:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:49,729 INFO L93 Difference]: Finished difference Result 986 states and 1394 transitions. [2022-01-31 23:42:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:49,730 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 [2022-01-31 23:42:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:49,733 INFO L225 Difference]: With dead ends: 986 [2022-01-31 23:42:49,733 INFO L226 Difference]: Without dead ends: 962 [2022-01-31 23:42:49,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:42:49,735 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 737 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:49,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2458 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:42:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-31 23:42:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 842. [2022-01-31 23:42:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3666666666666667) internal successors, (902), 674 states have internal predecessors, (902), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1155 transitions. [2022-01-31 23:42:49,891 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1155 transitions. Word has length 51 [2022-01-31 23:42:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1155 transitions. [2022-01-31 23:42:49,892 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) [2022-01-31 23:42:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1155 transitions. [2022-01-31 23:42:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 23:42:49,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:49,893 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] [2022-01-31 23:42:49,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:42:49,893 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 1 times [2022-01-31 23:42:49,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654204202] [2022-01-31 23:42:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:49,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:49,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:50,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:50,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654204202] [2022-01-31 23:42:50,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654204202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:50,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:50,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:42:50,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49625014] [2022-01-31 23:42:50,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:50,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:42:50,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:42:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:42:50,305 INFO L87 Difference]: Start difference. First operand 842 states and 1155 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) [2022-01-31 23:42:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:52,386 INFO L93 Difference]: Finished difference Result 974 states and 1378 transitions. [2022-01-31 23:42:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:52,387 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 [2022-01-31 23:42:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:52,390 INFO L225 Difference]: With dead ends: 974 [2022-01-31 23:42:52,390 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 23:42:52,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:42:52,391 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 2613 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:52,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 1383 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 23:42:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 842. [2022-01-31 23:42:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3651515151515152) internal successors, (901), 674 states have internal predecessors, (901), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1154 transitions. [2022-01-31 23:42:52,567 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1154 transitions. Word has length 53 [2022-01-31 23:42:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:52,567 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1154 transitions. [2022-01-31 23:42:52,567 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) [2022-01-31 23:42:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1154 transitions. [2022-01-31 23:42:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:42:52,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:52,570 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] [2022-01-31 23:42:52,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:42:52,571 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 1 times [2022-01-31 23:42:52,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:52,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440750426] [2022-01-31 23:42:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:52,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:52,573 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:52,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440750426] [2022-01-31 23:42:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440750426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:52,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:52,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:52,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722461189] [2022-01-31 23:42:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:52,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:52,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:52,701 INFO L87 Difference]: Start difference. First operand 842 states and 1154 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) [2022-01-31 23:42:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:54,677 INFO L93 Difference]: Finished difference Result 979 states and 1383 transitions. [2022-01-31 23:42:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:42:54,677 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 [2022-01-31 23:42:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:54,680 INFO L225 Difference]: With dead ends: 979 [2022-01-31 23:42:54,680 INFO L226 Difference]: Without dead ends: 943 [2022-01-31 23:42:54,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:42:54,681 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 1565 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1284 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-31 23:42:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 815. [2022-01-31 23:42:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3746081504702194) internal successors, (877), 651 states have internal predecessors, (877), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-01-31 23:42:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1124 transitions. [2022-01-31 23:42:54,848 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1124 transitions. Word has length 52 [2022-01-31 23:42:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:54,848 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1124 transitions. [2022-01-31 23:42:54,848 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) [2022-01-31 23:42:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1124 transitions. [2022-01-31 23:42:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:42:54,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:54,849 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] [2022-01-31 23:42:54,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:42:54,849 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 1 times [2022-01-31 23:42:54,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489032982] [2022-01-31 23:42:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:54,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:54,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:55,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489032982] [2022-01-31 23:42:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489032982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:55,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:42:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091197798] [2022-01-31 23:42:55,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:55,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:42:55,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:42:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:42:55,103 INFO L87 Difference]: Start difference. First operand 815 states and 1124 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) [2022-01-31 23:42:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:57,334 INFO L93 Difference]: Finished difference Result 945 states and 1345 transitions. [2022-01-31 23:42:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:57,335 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 [2022-01-31 23:42:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:57,338 INFO L225 Difference]: With dead ends: 945 [2022-01-31 23:42:57,338 INFO L226 Difference]: Without dead ends: 939 [2022-01-31 23:42:57,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:42:57,339 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 2544 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:57,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 1558 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:42:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-31 23:42:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 815. [2022-01-31 23:42:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3730407523510972) internal successors, (876), 651 states have internal predecessors, (876), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-01-31 23:42:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1123 transitions. [2022-01-31 23:42:57,518 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1123 transitions. Word has length 54 [2022-01-31 23:42:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1123 transitions. [2022-01-31 23:42:57,518 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) [2022-01-31 23:42:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1123 transitions. [2022-01-31 23:42:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 23:42:57,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:57,519 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] [2022-01-31 23:42:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:42:57,519 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 1 times [2022-01-31 23:42:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787502162] [2022-01-31 23:42:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:57,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:57,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:57,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787502162] [2022-01-31 23:42:57,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787502162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:57,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:57,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:42:57,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30075648] [2022-01-31 23:42:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:42:57,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:42:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:42:57,711 INFO L87 Difference]: Start difference. First operand 815 states and 1123 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) [2022-01-31 23:43:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:00,165 INFO L93 Difference]: Finished difference Result 966 states and 1372 transitions. [2022-01-31 23:43:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:43:00,166 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 [2022-01-31 23:43:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:00,169 INFO L225 Difference]: With dead ends: 966 [2022-01-31 23:43:00,169 INFO L226 Difference]: Without dead ends: 926 [2022-01-31 23:43:00,170 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 [2022-01-31 23:43:00,171 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1069 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 4889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:00,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2476 Invalid, 4889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4451 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-31 23:43:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 806. [2022-01-31 23:43:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 631 states have (on average 1.3565768621236134) internal successors, (856), 644 states have internal predecessors, (856), 107 states have call successors, (107), 49 states have call predecessors, (107), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-01-31 23:43:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1099 transitions. [2022-01-31 23:43:00,353 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1099 transitions. Word has length 55 [2022-01-31 23:43:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:00,353 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1099 transitions. [2022-01-31 23:43:00,353 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) [2022-01-31 23:43:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1099 transitions. [2022-01-31 23:43:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:43:00,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:00,355 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] [2022-01-31 23:43:00,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:43:00,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:00,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 1 times [2022-01-31 23:43:00,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:00,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907307828] [2022-01-31 23:43:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:00,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:00,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:43:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:00,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:00,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907307828] [2022-01-31 23:43:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907307828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:00,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:00,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:43:00,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938856184] [2022-01-31 23:43:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:00,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:43:00,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:43:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:43:00,576 INFO L87 Difference]: Start difference. First operand 806 states and 1099 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) [2022-01-31 23:43:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:03,340 INFO L93 Difference]: Finished difference Result 942 states and 1326 transitions. [2022-01-31 23:43:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:43:03,340 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 [2022-01-31 23:43:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:03,343 INFO L225 Difference]: With dead ends: 942 [2022-01-31 23:43:03,343 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 23:43:03,344 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 [2022-01-31 23:43:03,344 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 978 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:03,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2682 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 23:43:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 23:43:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 804. [2022-01-31 23:43:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 630 states have (on average 1.3555555555555556) internal successors, (854), 643 states have internal predecessors, (854), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-01-31 23:43:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1095 transitions. [2022-01-31 23:43:03,542 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1095 transitions. Word has length 56 [2022-01-31 23:43:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:03,542 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 1095 transitions. [2022-01-31 23:43:03,542 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) [2022-01-31 23:43:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1095 transitions. [2022-01-31 23:43:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 23:43:03,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:03,544 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] [2022-01-31 23:43:03,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:43:03,544 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 1 times [2022-01-31 23:43:03,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:03,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790196730] [2022-01-31 23:43:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:03,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:03,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:43:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:03,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790196730] [2022-01-31 23:43:03,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790196730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:03,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:03,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:43:03,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572340268] [2022-01-31 23:43:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:43:03,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:43:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:43:03,721 INFO L87 Difference]: Start difference. First operand 804 states and 1095 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) [2022-01-31 23:43:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:06,025 INFO L93 Difference]: Finished difference Result 937 states and 1319 transitions. [2022-01-31 23:43:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:43:06,026 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 [2022-01-31 23:43:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:06,029 INFO L225 Difference]: With dead ends: 937 [2022-01-31 23:43:06,029 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 23:43:06,029 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 [2022-01-31 23:43:06,030 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 682 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:06,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2653 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:43:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 23:43:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 799. [2022-01-31 23:43:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.3556618819776713) internal successors, (850), 640 states have internal predecessors, (850), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-01-31 23:43:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1088 transitions. [2022-01-31 23:43:06,222 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1088 transitions. Word has length 55 [2022-01-31 23:43:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:06,222 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1088 transitions. [2022-01-31 23:43:06,222 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) [2022-01-31 23:43:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1088 transitions. [2022-01-31 23:43:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:43:06,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:06,224 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] [2022-01-31 23:43:06,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:43:06,224 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 1 times [2022-01-31 23:43:06,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753090859] [2022-01-31 23:43:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:06,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:06,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:06,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:06,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753090859] [2022-01-31 23:43:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753090859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:06,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:43:06,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398850351] [2022-01-31 23:43:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:43:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:43:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:06,362 INFO L87 Difference]: Start difference. First operand 799 states and 1088 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) [2022-01-31 23:43:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:08,035 INFO L93 Difference]: Finished difference Result 984 states and 1370 transitions. [2022-01-31 23:43:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:43:08,036 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 [2022-01-31 23:43:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:08,039 INFO L225 Difference]: With dead ends: 984 [2022-01-31 23:43:08,039 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 23:43:08,039 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 [2022-01-31 23:43:08,039 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:08,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1190 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:43:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 23:43:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 799. [2022-01-31 23:43:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.354066985645933) internal successors, (849), 640 states have internal predecessors, (849), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-01-31 23:43:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1087 transitions. [2022-01-31 23:43:08,243 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1087 transitions. Word has length 56 [2022-01-31 23:43:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:08,243 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1087 transitions. [2022-01-31 23:43:08,243 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) [2022-01-31 23:43:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1087 transitions. [2022-01-31 23:43:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:43:08,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:08,244 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 23:43:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:43:08,245 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 1 times [2022-01-31 23:43:08,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:08,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707054150] [2022-01-31 23:43:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:08,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:08,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:43:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:43:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:08,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707054150] [2022-01-31 23:43:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707054150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:08,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:08,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:43:08,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923890530] [2022-01-31 23:43:08,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:08,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:43:08,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:43:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:43:08,385 INFO L87 Difference]: Start difference. First operand 799 states and 1087 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:43:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:09,804 INFO L93 Difference]: Finished difference Result 1186 states and 1642 transitions. [2022-01-31 23:43:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:43:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2022-01-31 23:43:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:09,808 INFO L225 Difference]: With dead ends: 1186 [2022-01-31 23:43:09,808 INFO L226 Difference]: Without dead ends: 1023 [2022-01-31 23:43:09,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:09,809 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1350 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:09,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 1397 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:43:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-31 23:43:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 840. [2022-01-31 23:43:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 660 states have (on average 1.3424242424242425) internal successors, (886), 672 states have internal predecessors, (886), 106 states have call successors, (106), 53 states have call predecessors, (106), 73 states have return successors, (135), 121 states have call predecessors, (135), 100 states have call successors, (135) [2022-01-31 23:43:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1127 transitions. [2022-01-31 23:43:10,009 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1127 transitions. Word has length 74 [2022-01-31 23:43:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:10,009 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1127 transitions. [2022-01-31 23:43:10,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:43:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1127 transitions. [2022-01-31 23:43:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:43:10,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:10,011 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] [2022-01-31 23:43:10,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:43:10,011 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 1 times [2022-01-31 23:43:10,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:10,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101833213] [2022-01-31 23:43:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:10,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:10,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 23:43:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:10,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101833213] [2022-01-31 23:43:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101833213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:10,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:10,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:10,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148146553] [2022-01-31 23:43:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:10,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:10,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:10,267 INFO L87 Difference]: Start difference. First operand 840 states and 1127 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) [2022-01-31 23:43:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:12,996 INFO L93 Difference]: Finished difference Result 1008 states and 1399 transitions. [2022-01-31 23:43:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:12,996 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 [2022-01-31 23:43:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:12,999 INFO L225 Difference]: With dead ends: 1008 [2022-01-31 23:43:12,999 INFO L226 Difference]: Without dead ends: 984 [2022-01-31 23:43:13,000 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 [2022-01-31 23:43:13,000 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 1351 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 5451 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 5451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:13,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 3154 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 5451 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:43:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-31 23:43:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 838. [2022-01-31 23:43:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 659 states have (on average 1.3414264036418817) internal successors, (884), 671 states have internal predecessors, (884), 105 states have call successors, (105), 53 states have call predecessors, (105), 73 states have return successors, (134), 120 states have call predecessors, (134), 99 states have call successors, (134) [2022-01-31 23:43:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1123 transitions. [2022-01-31 23:43:13,211 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1123 transitions. Word has length 62 [2022-01-31 23:43:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:13,212 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1123 transitions. [2022-01-31 23:43:13,212 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) [2022-01-31 23:43:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1123 transitions. [2022-01-31 23:43:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 23:43:13,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:13,213 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] [2022-01-31 23:43:13,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:43:13,213 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 1 times [2022-01-31 23:43:13,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122132882] [2022-01-31 23:43:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:13,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:13,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:13,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122132882] [2022-01-31 23:43:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122132882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:13,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:13,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:13,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479328650] [2022-01-31 23:43:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:13,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:13,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:13,468 INFO L87 Difference]: Start difference. First operand 838 states and 1123 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) [2022-01-31 23:43:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:16,616 INFO L93 Difference]: Finished difference Result 1006 states and 1395 transitions. [2022-01-31 23:43:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:16,617 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 [2022-01-31 23:43:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:16,620 INFO L225 Difference]: With dead ends: 1006 [2022-01-31 23:43:16,620 INFO L226 Difference]: Without dead ends: 980 [2022-01-31 23:43:16,621 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 [2022-01-31 23:43:16,621 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 1320 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 6369 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 6918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 6369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:16,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 3392 Invalid, 6918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 6369 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:43:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-31 23:43:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 837. [2022-01-31 23:43:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 658 states have (on average 1.3267477203647415) internal successors, (873), 670 states have internal predecessors, (873), 105 states have call successors, (105), 53 states have call predecessors, (105), 73 states have return successors, (134), 120 states have call predecessors, (134), 99 states have call successors, (134) [2022-01-31 23:43:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1112 transitions. [2022-01-31 23:43:16,848 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1112 transitions. Word has length 59 [2022-01-31 23:43:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:16,848 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1112 transitions. [2022-01-31 23:43:16,848 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) [2022-01-31 23:43:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1112 transitions. [2022-01-31 23:43:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 23:43:16,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:16,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:16,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:43:16,850 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 1 times [2022-01-31 23:43:16,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:16,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454983767] [2022-01-31 23:43:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:16,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:16,852 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:16,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:17,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:17,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454983767] [2022-01-31 23:43:17,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454983767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:17,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:17,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705723829] [2022-01-31 23:43:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:17,089 INFO L87 Difference]: Start difference. First operand 837 states and 1112 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) [2022-01-31 23:43:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:20,278 INFO L93 Difference]: Finished difference Result 995 states and 1369 transitions. [2022-01-31 23:43:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:43:20,279 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 [2022-01-31 23:43:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:20,282 INFO L225 Difference]: With dead ends: 995 [2022-01-31 23:43:20,283 INFO L226 Difference]: Without dead ends: 975 [2022-01-31 23:43:20,283 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 [2022-01-31 23:43:20,283 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 324 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 6189 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 6324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 6189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:20,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 2976 Invalid, 6324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 6189 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:43:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-31 23:43:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 834. [2022-01-31 23:43:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 656 states have (on average 1.326219512195122) internal successors, (870), 668 states have internal predecessors, (870), 104 states have call successors, (104), 53 states have call predecessors, (104), 73 states have return successors, (133), 119 states have call predecessors, (133), 98 states have call successors, (133) [2022-01-31 23:43:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1107 transitions. [2022-01-31 23:43:20,494 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1107 transitions. Word has length 58 [2022-01-31 23:43:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:20,494 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1107 transitions. [2022-01-31 23:43:20,494 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) [2022-01-31 23:43:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1107 transitions. [2022-01-31 23:43:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 23:43:20,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:20,495 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] [2022-01-31 23:43:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:43:20,496 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 1 times [2022-01-31 23:43:20,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188909542] [2022-01-31 23:43:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:20,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:20,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:20,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188909542] [2022-01-31 23:43:20,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188909542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:20,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:20,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:20,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882188457] [2022-01-31 23:43:20,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:20,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:20,701 INFO L87 Difference]: Start difference. First operand 834 states and 1107 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) [2022-01-31 23:43:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:23,247 INFO L93 Difference]: Finished difference Result 1028 states and 1401 transitions. [2022-01-31 23:43:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:23,248 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 [2022-01-31 23:43:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:23,250 INFO L225 Difference]: With dead ends: 1028 [2022-01-31 23:43:23,250 INFO L226 Difference]: Without dead ends: 960 [2022-01-31 23:43:23,251 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 [2022-01-31 23:43:23,251 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1257 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 4739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:23,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 2561 Invalid, 4739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:43:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-31 23:43:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 822. [2022-01-31 23:43:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 647 states have (on average 1.321483771251932) internal successors, (855), 659 states have internal predecessors, (855), 101 states have call successors, (101), 53 states have call predecessors, (101), 73 states have return successors, (130), 116 states have call predecessors, (130), 95 states have call successors, (130) [2022-01-31 23:43:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1086 transitions. [2022-01-31 23:43:23,467 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1086 transitions. Word has length 59 [2022-01-31 23:43:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:23,467 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1086 transitions. [2022-01-31 23:43:23,467 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) [2022-01-31 23:43:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1086 transitions. [2022-01-31 23:43:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:23,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:23,468 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] [2022-01-31 23:43:23,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:43:23,468 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 1 times [2022-01-31 23:43:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507018277] [2022-01-31 23:43:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:23,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:23,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:23,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507018277] [2022-01-31 23:43:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507018277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:23,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:23,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:43:23,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984291575] [2022-01-31 23:43:23,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:23,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:43:23,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:43:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:43:23,610 INFO L87 Difference]: Start difference. First operand 822 states and 1086 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) [2022-01-31 23:43:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:25,427 INFO L93 Difference]: Finished difference Result 1126 states and 1577 transitions. [2022-01-31 23:43:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:43:25,428 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 [2022-01-31 23:43:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:25,430 INFO L225 Difference]: With dead ends: 1126 [2022-01-31 23:43:25,431 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 23:43:25,431 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 [2022-01-31 23:43:25,431 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1593 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1335 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:43:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 23:43:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 829. [2022-01-31 23:43:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 652 states have (on average 1.322085889570552) internal successors, (862), 665 states have internal predecessors, (862), 102 states have call successors, (102), 53 states have call predecessors, (102), 74 states have return successors, (137), 117 states have call predecessors, (137), 96 states have call successors, (137) [2022-01-31 23:43:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1101 transitions. [2022-01-31 23:43:25,641 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1101 transitions. Word has length 60 [2022-01-31 23:43:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:25,641 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1101 transitions. [2022-01-31 23:43:25,641 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) [2022-01-31 23:43:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1101 transitions. [2022-01-31 23:43:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:25,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:25,643 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] [2022-01-31 23:43:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:43:25,643 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 1 times [2022-01-31 23:43:25,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694034291] [2022-01-31 23:43:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:25,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:25,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:25,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694034291] [2022-01-31 23:43:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694034291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:25,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:25,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684662976] [2022-01-31 23:43:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:25,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:25,865 INFO L87 Difference]: Start difference. First operand 829 states and 1101 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) [2022-01-31 23:43:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:28,177 INFO L93 Difference]: Finished difference Result 993 states and 1373 transitions. [2022-01-31 23:43:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:43:28,177 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 [2022-01-31 23:43:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:28,180 INFO L225 Difference]: With dead ends: 993 [2022-01-31 23:43:28,180 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 23:43:28,181 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 [2022-01-31 23:43:28,181 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 932 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 4004 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 4004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:28,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 2741 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 4004 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:43:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 23:43:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 827. [2022-01-31 23:43:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 651 states have (on average 1.3210445468509984) internal successors, (860), 664 states have internal predecessors, (860), 101 states have call successors, (101), 53 states have call predecessors, (101), 74 states have return successors, (136), 116 states have call predecessors, (136), 95 states have call successors, (136) [2022-01-31 23:43:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1097 transitions. [2022-01-31 23:43:28,427 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1097 transitions. Word has length 60 [2022-01-31 23:43:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:28,427 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1097 transitions. [2022-01-31 23:43:28,427 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) [2022-01-31 23:43:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1097 transitions. [2022-01-31 23:43:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:28,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:28,429 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] [2022-01-31 23:43:28,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:43:28,429 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 1 times [2022-01-31 23:43:28,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991529872] [2022-01-31 23:43:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:28,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:28,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:28,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991529872] [2022-01-31 23:43:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [991529872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:28,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:28,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:43:28,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108457127] [2022-01-31 23:43:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:43:28,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:43:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:43:28,608 INFO L87 Difference]: Start difference. First operand 827 states and 1097 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:43:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:30,444 INFO L93 Difference]: Finished difference Result 1002 states and 1377 transitions. [2022-01-31 23:43:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:43:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-01-31 23:43:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:30,447 INFO L225 Difference]: With dead ends: 1002 [2022-01-31 23:43:30,447 INFO L226 Difference]: Without dead ends: 970 [2022-01-31 23:43:30,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:43:30,448 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 913 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:30,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 1717 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:43:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-31 23:43:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 827. [2022-01-31 23:43:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 651 states have (on average 1.3195084485407067) internal successors, (859), 664 states have internal predecessors, (859), 101 states have call successors, (101), 53 states have call predecessors, (101), 74 states have return successors, (136), 116 states have call predecessors, (136), 95 states have call successors, (136) [2022-01-31 23:43:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1096 transitions. [2022-01-31 23:43:30,686 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1096 transitions. Word has length 60 [2022-01-31 23:43:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:30,687 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1096 transitions. [2022-01-31 23:43:30,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:43:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1096 transitions. [2022-01-31 23:43:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:30,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:30,688 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] [2022-01-31 23:43:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:43:30,689 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 1 times [2022-01-31 23:43:30,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581857398] [2022-01-31 23:43:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:30,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:30,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:30,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:30,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581857398] [2022-01-31 23:43:30,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [581857398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:30,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:30,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:30,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073056822] [2022-01-31 23:43:30,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:30,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:30,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:30,902 INFO L87 Difference]: Start difference. First operand 827 states and 1096 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) [2022-01-31 23:43:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:33,640 INFO L93 Difference]: Finished difference Result 1009 states and 1394 transitions. [2022-01-31 23:43:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:33,641 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 [2022-01-31 23:43:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:33,643 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 23:43:33,644 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 23:43:33,644 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 [2022-01-31 23:43:33,645 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 955 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 4738 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 5125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:33,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 2582 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4738 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 23:43:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 819. [2022-01-31 23:43:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 645 states have (on average 1.3147286821705426) internal successors, (848), 658 states have internal predecessors, (848), 99 states have call successors, (99), 53 states have call predecessors, (99), 74 states have return successors, (134), 114 states have call predecessors, (134), 93 states have call successors, (134) [2022-01-31 23:43:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1081 transitions. [2022-01-31 23:43:33,878 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1081 transitions. Word has length 60 [2022-01-31 23:43:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:33,878 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1081 transitions. [2022-01-31 23:43:33,878 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) [2022-01-31 23:43:33,878 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1081 transitions. [2022-01-31 23:43:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 23:43:33,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:33,879 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] [2022-01-31 23:43:33,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:43:33,880 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 1 times [2022-01-31 23:43:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:33,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050234686] [2022-01-31 23:43:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:33,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:33,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:34,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:34,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:34,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050234686] [2022-01-31 23:43:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050234686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:34,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451772339] [2022-01-31 23:43:34,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:34,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:34,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:34,044 INFO L87 Difference]: Start difference. First operand 819 states and 1081 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) [2022-01-31 23:43:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:35,612 INFO L93 Difference]: Finished difference Result 1005 states and 1395 transitions. [2022-01-31 23:43:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:43:35,612 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 [2022-01-31 23:43:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:35,615 INFO L225 Difference]: With dead ends: 1005 [2022-01-31 23:43:35,615 INFO L226 Difference]: Without dead ends: 971 [2022-01-31 23:43:35,615 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 [2022-01-31 23:43:35,616 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 657 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:35,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 1477 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:43:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-31 23:43:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 823. [2022-01-31 23:43:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 647 states have (on average 1.3137557959814528) internal successors, (850), 662 states have internal predecessors, (850), 99 states have call successors, (99), 53 states have call predecessors, (99), 76 states have return successors, (150), 114 states have call predecessors, (150), 93 states have call successors, (150) [2022-01-31 23:43:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1099 transitions. [2022-01-31 23:43:35,859 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1099 transitions. Word has length 61 [2022-01-31 23:43:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 1099 transitions. [2022-01-31 23:43:35,859 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) [2022-01-31 23:43:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1099 transitions. [2022-01-31 23:43:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:43:35,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:35,861 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] [2022-01-31 23:43:35,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:43:35,861 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 1 times [2022-01-31 23:43:35,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:35,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598930535] [2022-01-31 23:43:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:35,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:35,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:35,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:35,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:36,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598930535] [2022-01-31 23:43:36,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598930535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:36,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:36,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:36,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575059573] [2022-01-31 23:43:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:36,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:36,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:36,206 INFO L87 Difference]: Start difference. First operand 823 states and 1099 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) [2022-01-31 23:43:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:39,320 INFO L93 Difference]: Finished difference Result 978 states and 1360 transitions. [2022-01-31 23:43:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:39,321 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 [2022-01-31 23:43:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:39,324 INFO L225 Difference]: With dead ends: 978 [2022-01-31 23:43:39,324 INFO L226 Difference]: Without dead ends: 948 [2022-01-31 23:43:39,324 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 [2022-01-31 23:43:39,324 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 301 mSDsluCounter, 2553 mSDsCounter, 0 mSdLazyCounter, 6002 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 6129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 6002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:39,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 3156 Invalid, 6129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 6002 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:43:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-31 23:43:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 812. [2022-01-31 23:43:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 639 states have (on average 1.3145539906103287) internal successors, (840), 654 states have internal predecessors, (840), 97 states have call successors, (97), 53 states have call predecessors, (97), 75 states have return successors, (147), 111 states have call predecessors, (147), 91 states have call successors, (147) [2022-01-31 23:43:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1084 transitions. [2022-01-31 23:43:39,588 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1084 transitions. Word has length 69 [2022-01-31 23:43:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:39,588 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1084 transitions. [2022-01-31 23:43:39,588 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) [2022-01-31 23:43:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1084 transitions. [2022-01-31 23:43:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:39,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:39,590 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] [2022-01-31 23:43:39,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:43:39,590 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 1 times [2022-01-31 23:43:39,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549165197] [2022-01-31 23:43:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:39,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:39,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:39,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549165197] [2022-01-31 23:43:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549165197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:39,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:39,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82774646] [2022-01-31 23:43:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:39,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:39,845 INFO L87 Difference]: Start difference. First operand 812 states and 1084 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) [2022-01-31 23:43:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:42,528 INFO L93 Difference]: Finished difference Result 965 states and 1341 transitions. [2022-01-31 23:43:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:42,528 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 [2022-01-31 23:43:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:42,531 INFO L225 Difference]: With dead ends: 965 [2022-01-31 23:43:42,531 INFO L226 Difference]: Without dead ends: 943 [2022-01-31 23:43:42,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:43:42,531 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 855 mSDsluCounter, 2567 mSDsCounter, 0 mSdLazyCounter, 5440 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 5790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 5440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:42,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 3158 Invalid, 5790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 5440 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-31 23:43:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 807. [2022-01-31 23:43:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 636 states have (on average 1.3144654088050314) internal successors, (836), 651 states have internal predecessors, (836), 96 states have call successors, (96), 53 states have call predecessors, (96), 74 states have return successors, (145), 109 states have call predecessors, (145), 90 states have call successors, (145) [2022-01-31 23:43:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1077 transitions. [2022-01-31 23:43:42,784 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1077 transitions. Word has length 63 [2022-01-31 23:43:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1077 transitions. [2022-01-31 23:43:42,784 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) [2022-01-31 23:43:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1077 transitions. [2022-01-31 23:43:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:43:42,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:42,786 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] [2022-01-31 23:43:42,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:43:42,786 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:42,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 1 times [2022-01-31 23:43:42,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:42,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726921754] [2022-01-31 23:43:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:42,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:42,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:42,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:43,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:43,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:43,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726921754] [2022-01-31 23:43:43,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726921754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:43,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:43,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:43,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791898008] [2022-01-31 23:43:43,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:43,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:43,033 INFO L87 Difference]: Start difference. First operand 807 states and 1077 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) [2022-01-31 23:43:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:45,459 INFO L93 Difference]: Finished difference Result 960 states and 1334 transitions. [2022-01-31 23:43:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:45,460 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 [2022-01-31 23:43:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:45,462 INFO L225 Difference]: With dead ends: 960 [2022-01-31 23:43:45,462 INFO L226 Difference]: Without dead ends: 938 [2022-01-31 23:43:45,463 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 [2022-01-31 23:43:45,463 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 1692 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 5042 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 5726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 5042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:45,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 3039 Invalid, 5726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 5042 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:43:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-31 23:43:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 802. [2022-01-31 23:43:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 633 states have (on average 1.3143759873617693) internal successors, (832), 648 states have internal predecessors, (832), 95 states have call successors, (95), 53 states have call predecessors, (95), 73 states have return successors, (143), 107 states have call predecessors, (143), 89 states have call successors, (143) [2022-01-31 23:43:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1070 transitions. [2022-01-31 23:43:45,728 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1070 transitions. Word has length 62 [2022-01-31 23:43:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:45,728 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1070 transitions. [2022-01-31 23:43:45,729 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) [2022-01-31 23:43:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1070 transitions. [2022-01-31 23:43:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:45,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:45,730 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] [2022-01-31 23:43:45,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:43:45,730 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 1 times [2022-01-31 23:43:45,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478770736] [2022-01-31 23:43:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:45,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:45,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:45,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478770736] [2022-01-31 23:43:45,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478770736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:45,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:45,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:43:45,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514857530] [2022-01-31 23:43:45,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:45,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:43:45,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:43:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:43:45,981 INFO L87 Difference]: Start difference. First operand 802 states and 1070 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) [2022-01-31 23:43:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:48,646 INFO L93 Difference]: Finished difference Result 962 states and 1334 transitions. [2022-01-31 23:43:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:43:48,646 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 [2022-01-31 23:43:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:48,649 INFO L225 Difference]: With dead ends: 962 [2022-01-31 23:43:48,649 INFO L226 Difference]: Without dead ends: 937 [2022-01-31 23:43:48,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:43:48,650 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 1223 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 5119 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 5605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 5119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:48,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 3081 Invalid, 5605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 5119 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:43:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-31 23:43:48,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 800. [2022-01-31 23:43:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 632 states have (on average 1.3132911392405062) internal successors, (830), 647 states have internal predecessors, (830), 94 states have call successors, (94), 53 states have call predecessors, (94), 73 states have return successors, (142), 106 states have call predecessors, (142), 88 states have call successors, (142) [2022-01-31 23:43:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1066 transitions. [2022-01-31 23:43:48,916 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1066 transitions. Word has length 66 [2022-01-31 23:43:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1066 transitions. [2022-01-31 23:43:48,917 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) [2022-01-31 23:43:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1066 transitions. [2022-01-31 23:43:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:43:48,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:48,918 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] [2022-01-31 23:43:48,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:43:48,918 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 1 times [2022-01-31 23:43:48,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341970217] [2022-01-31 23:43:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:48,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:48,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:49,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:49,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341970217] [2022-01-31 23:43:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341970217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:49,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:43:49,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265567279] [2022-01-31 23:43:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:49,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:43:49,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:43:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:43:49,206 INFO L87 Difference]: Start difference. First operand 800 states and 1066 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) [2022-01-31 23:43:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:52,405 INFO L93 Difference]: Finished difference Result 959 states and 1327 transitions. [2022-01-31 23:43:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:43:52,406 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 [2022-01-31 23:43:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:52,409 INFO L225 Difference]: With dead ends: 959 [2022-01-31 23:43:52,409 INFO L226 Difference]: Without dead ends: 934 [2022-01-31 23:43:52,409 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 [2022-01-31 23:43:52,410 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 353 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 6059 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 3515 SdHoareTripleChecker+Invalid, 6197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 6059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:52,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 3515 Invalid, 6197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 6059 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:43:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-01-31 23:43:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 798. [2022-01-31 23:43:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 631 states have (on average 1.312202852614897) internal successors, (828), 646 states have internal predecessors, (828), 93 states have call successors, (93), 53 states have call predecessors, (93), 73 states have return successors, (141), 105 states have call predecessors, (141), 87 states have call successors, (141) [2022-01-31 23:43:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1062 transitions. [2022-01-31 23:43:52,698 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1062 transitions. Word has length 67 [2022-01-31 23:43:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:52,699 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1062 transitions. [2022-01-31 23:43:52,699 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) [2022-01-31 23:43:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1062 transitions. [2022-01-31 23:43:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:52,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:52,700 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] [2022-01-31 23:43:52,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 23:43:52,701 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 1 times [2022-01-31 23:43:52,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:52,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775149166] [2022-01-31 23:43:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:52,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:52,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:43:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:52,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775149166] [2022-01-31 23:43:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775149166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:52,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:52,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:52,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31354162] [2022-01-31 23:43:52,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:52,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:52,983 INFO L87 Difference]: Start difference. First operand 798 states and 1062 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) [2022-01-31 23:43:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:55,792 INFO L93 Difference]: Finished difference Result 954 states and 1318 transitions. [2022-01-31 23:43:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:43:55,792 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 [2022-01-31 23:43:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:55,795 INFO L225 Difference]: With dead ends: 954 [2022-01-31 23:43:55,795 INFO L226 Difference]: Without dead ends: 930 [2022-01-31 23:43:55,796 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 [2022-01-31 23:43:55,796 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 594 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 5463 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 5698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 5463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 3059 Invalid, 5698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 5463 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-31 23:43:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 796. [2022-01-31 23:43:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 630 states have (on average 1.3111111111111111) internal successors, (826), 645 states have internal predecessors, (826), 92 states have call successors, (92), 53 states have call predecessors, (92), 73 states have return successors, (140), 104 states have call predecessors, (140), 86 states have call successors, (140) [2022-01-31 23:43:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1058 transitions. [2022-01-31 23:43:56,069 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1058 transitions. Word has length 63 [2022-01-31 23:43:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:56,070 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1058 transitions. [2022-01-31 23:43:56,070 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) [2022-01-31 23:43:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1058 transitions. [2022-01-31 23:43:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:56,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:56,071 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] [2022-01-31 23:43:56,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 23:43:56,071 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 1 times [2022-01-31 23:43:56,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:56,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428227084] [2022-01-31 23:43:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:56,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:56,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:43:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:56,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:56,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428227084] [2022-01-31 23:43:56,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428227084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:56,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:56,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:43:56,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594696300] [2022-01-31 23:43:56,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:43:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:43:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:56,192 INFO L87 Difference]: Start difference. First operand 796 states and 1058 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) [2022-01-31 23:43:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:57,292 INFO L93 Difference]: Finished difference Result 1144 states and 1548 transitions. [2022-01-31 23:43:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:43:57,293 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 [2022-01-31 23:43:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:57,295 INFO L225 Difference]: With dead ends: 1144 [2022-01-31 23:43:57,295 INFO L226 Difference]: Without dead ends: 791 [2022-01-31 23:43:57,296 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 [2022-01-31 23:43:57,297 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 589 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:57,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 1129 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:43:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-31 23:43:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 688. [2022-01-31 23:43:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 545 states have (on average 1.3027522935779816) internal successors, (710), 559 states have internal predecessors, (710), 80 states have call successors, (80), 47 states have call predecessors, (80), 62 states have return successors, (99), 88 states have call predecessors, (99), 74 states have call successors, (99) [2022-01-31 23:43:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 889 transitions. [2022-01-31 23:43:57,539 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 889 transitions. Word has length 63 [2022-01-31 23:43:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:57,539 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 889 transitions. [2022-01-31 23:43:57,540 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) [2022-01-31 23:43:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 889 transitions. [2022-01-31 23:43:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:57,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:57,541 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] [2022-01-31 23:43:57,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 23:43:57,541 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 1 times [2022-01-31 23:43:57,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:57,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52389343] [2022-01-31 23:43:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:57,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:57,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:43:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:57,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52389343] [2022-01-31 23:43:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [52389343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:57,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:57,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:43:57,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968313659] [2022-01-31 23:43:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:57,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:43:57,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:43:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:43:57,684 INFO L87 Difference]: Start difference. First operand 688 states and 889 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) [2022-01-31 23:43:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:59,104 INFO L93 Difference]: Finished difference Result 876 states and 1153 transitions. [2022-01-31 23:43:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:43:59,104 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 [2022-01-31 23:43:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:59,106 INFO L225 Difference]: With dead ends: 876 [2022-01-31 23:43:59,106 INFO L226 Difference]: Without dead ends: 756 [2022-01-31 23:43:59,106 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 [2022-01-31 23:43:59,107 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 398 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:59,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 934 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:43:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-31 23:43:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 688. [2022-01-31 23:43:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 545 states have (on average 1.2990825688073395) internal successors, (708), 559 states have internal predecessors, (708), 80 states have call successors, (80), 47 states have call predecessors, (80), 62 states have return successors, (99), 88 states have call predecessors, (99), 74 states have call successors, (99) [2022-01-31 23:43:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 887 transitions. [2022-01-31 23:43:59,386 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 887 transitions. Word has length 66 [2022-01-31 23:43:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:59,387 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 887 transitions. [2022-01-31 23:43:59,387 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) [2022-01-31 23:43:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 887 transitions. [2022-01-31 23:43:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 23:43:59,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:59,388 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] [2022-01-31 23:43:59,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 23:43:59,388 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 1 times [2022-01-31 23:43:59,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987497493] [2022-01-31 23:43:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:59,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:59,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:43:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:59,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987497493] [2022-01-31 23:43:59,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987497493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:59,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:59,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226112451] [2022-01-31 23:43:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:59,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:59,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:59,549 INFO L87 Difference]: Start difference. First operand 688 states and 887 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) [2022-01-31 23:44:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:01,381 INFO L93 Difference]: Finished difference Result 820 states and 1069 transitions. [2022-01-31 23:44:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:44:01,382 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 [2022-01-31 23:44:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:01,384 INFO L225 Difference]: With dead ends: 820 [2022-01-31 23:44:01,384 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 23:44:01,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:44:01,385 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 1269 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:01,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 1451 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:44:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 23:44:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 694. [2022-01-31 23:44:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 550 states have (on average 1.298181818181818) internal successors, (714), 564 states have internal predecessors, (714), 81 states have call successors, (81), 47 states have call predecessors, (81), 62 states have return successors, (100), 89 states have call predecessors, (100), 75 states have call successors, (100) [2022-01-31 23:44:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 895 transitions. [2022-01-31 23:44:01,659 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 895 transitions. Word has length 65 [2022-01-31 23:44:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:01,659 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 895 transitions. [2022-01-31 23:44:01,659 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) [2022-01-31 23:44:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 895 transitions. [2022-01-31 23:44:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:44:01,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:01,660 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] [2022-01-31 23:44:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 23:44:01,661 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 1 times [2022-01-31 23:44:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:01,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114349791] [2022-01-31 23:44:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:01,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:01,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:01,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114349791] [2022-01-31 23:44:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114349791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:01,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:01,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:01,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563448433] [2022-01-31 23:44:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:01,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:01,824 INFO L87 Difference]: Start difference. First operand 694 states and 895 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) [2022-01-31 23:44:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:03,418 INFO L93 Difference]: Finished difference Result 818 states and 1062 transitions. [2022-01-31 23:44:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:44:03,418 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 [2022-01-31 23:44:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:03,420 INFO L225 Difference]: With dead ends: 818 [2022-01-31 23:44:03,420 INFO L226 Difference]: Without dead ends: 764 [2022-01-31 23:44:03,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:44:03,421 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 835 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:03,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1340 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:44:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-31 23:44:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 694. [2022-01-31 23:44:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 550 states have (on average 1.2945454545454544) internal successors, (712), 564 states have internal predecessors, (712), 81 states have call successors, (81), 47 states have call predecessors, (81), 62 states have return successors, (100), 89 states have call predecessors, (100), 75 states have call successors, (100) [2022-01-31 23:44:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 893 transitions. [2022-01-31 23:44:03,694 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 893 transitions. Word has length 66 [2022-01-31 23:44:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:03,694 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 893 transitions. [2022-01-31 23:44:03,694 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) [2022-01-31 23:44:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 893 transitions. [2022-01-31 23:44:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:44:03,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:03,696 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] [2022-01-31 23:44:03,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 23:44:03,696 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 1 times [2022-01-31 23:44:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479893135] [2022-01-31 23:44:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:03,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:03,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:03,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479893135] [2022-01-31 23:44:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [479893135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:03,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:03,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:44:03,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127250739] [2022-01-31 23:44:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:03,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:44:03,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:44:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:44:03,923 INFO L87 Difference]: Start difference. First operand 694 states and 893 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) [2022-01-31 23:44:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:05,820 INFO L93 Difference]: Finished difference Result 789 states and 1029 transitions. [2022-01-31 23:44:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:05,821 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 [2022-01-31 23:44:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:05,822 INFO L225 Difference]: With dead ends: 789 [2022-01-31 23:44:05,823 INFO L226 Difference]: Without dead ends: 712 [2022-01-31 23:44:05,823 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 [2022-01-31 23:44:05,823 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1151 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:05,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 1996 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:44:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-31 23:44:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 657. [2022-01-31 23:44:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 520 states have (on average 1.2807692307692307) internal successors, (666), 534 states have internal predecessors, (666), 74 states have call successors, (74), 47 states have call predecessors, (74), 62 states have return successors, (92), 82 states have call predecessors, (92), 68 states have call successors, (92) [2022-01-31 23:44:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 832 transitions. [2022-01-31 23:44:06,053 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 832 transitions. Word has length 66 [2022-01-31 23:44:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:06,053 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 832 transitions. [2022-01-31 23:44:06,053 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) [2022-01-31 23:44:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 832 transitions. [2022-01-31 23:44:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:44:06,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:06,055 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] [2022-01-31 23:44:06,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 23:44:06,055 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 1 times [2022-01-31 23:44:06,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:06,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791157493] [2022-01-31 23:44:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:06,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:06,057 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 23:44:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:06,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791157493] [2022-01-31 23:44:06,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [791157493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:06,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:06,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:06,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550703863] [2022-01-31 23:44:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:06,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:06,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:06,216 INFO L87 Difference]: Start difference. First operand 657 states and 832 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) [2022-01-31 23:44:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:07,527 INFO L93 Difference]: Finished difference Result 740 states and 943 transitions. [2022-01-31 23:44:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:07,528 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 [2022-01-31 23:44:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:07,529 INFO L225 Difference]: With dead ends: 740 [2022-01-31 23:44:07,529 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 23:44:07,530 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 [2022-01-31 23:44:07,530 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 1198 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:07,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 1059 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 23:44:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 652. [2022-01-31 23:44:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 516 states have (on average 1.2810077519379846) internal successors, (661), 530 states have internal predecessors, (661), 73 states have call successors, (73), 47 states have call predecessors, (73), 62 states have return successors, (91), 81 states have call predecessors, (91), 67 states have call successors, (91) [2022-01-31 23:44:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 825 transitions. [2022-01-31 23:44:07,763 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 825 transitions. Word has length 67 [2022-01-31 23:44:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:07,763 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 825 transitions. [2022-01-31 23:44:07,763 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) [2022-01-31 23:44:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 825 transitions. [2022-01-31 23:44:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:44:07,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:07,764 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] [2022-01-31 23:44:07,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 23:44:07,764 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 1 times [2022-01-31 23:44:07,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:07,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936093035] [2022-01-31 23:44:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:07,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:07,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:07,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:07,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936093035] [2022-01-31 23:44:07,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [936093035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:07,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:07,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:44:07,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024198499] [2022-01-31 23:44:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:44:07,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:44:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:44:07,931 INFO L87 Difference]: Start difference. First operand 652 states and 825 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) [2022-01-31 23:44:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:09,427 INFO L93 Difference]: Finished difference Result 836 states and 1071 transitions. [2022-01-31 23:44:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:44:09,427 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 [2022-01-31 23:44:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:09,429 INFO L225 Difference]: With dead ends: 836 [2022-01-31 23:44:09,429 INFO L226 Difference]: Without dead ends: 824 [2022-01-31 23:44:09,430 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 [2022-01-31 23:44:09,430 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 474 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:09,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 907 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:44:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-31 23:44:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 698. [2022-01-31 23:44:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.2735507246376812) internal successors, (703), 568 states have internal predecessors, (703), 75 states have call successors, (75), 49 states have call predecessors, (75), 70 states have return successors, (99), 89 states have call predecessors, (99), 69 states have call successors, (99) [2022-01-31 23:44:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 877 transitions. [2022-01-31 23:44:09,654 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 877 transitions. Word has length 67 [2022-01-31 23:44:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 877 transitions. [2022-01-31 23:44:09,655 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) [2022-01-31 23:44:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 877 transitions. [2022-01-31 23:44:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 23:44:09,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:09,656 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] [2022-01-31 23:44:09,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 23:44:09,656 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 1 times [2022-01-31 23:44:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137605447] [2022-01-31 23:44:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:09,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:09,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:09,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137605447] [2022-01-31 23:44:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137605447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:09,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:09,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885437978] [2022-01-31 23:44:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:09,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:09,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:09,839 INFO L87 Difference]: Start difference. First operand 698 states and 877 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) [2022-01-31 23:44:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:11,533 INFO L93 Difference]: Finished difference Result 830 states and 1060 transitions. [2022-01-31 23:44:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:44:11,533 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 [2022-01-31 23:44:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:11,536 INFO L225 Difference]: With dead ends: 830 [2022-01-31 23:44:11,536 INFO L226 Difference]: Without dead ends: 821 [2022-01-31 23:44:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:44:11,537 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1479 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:11,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 900 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:44:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-31 23:44:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 698. [2022-01-31 23:44:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.269927536231884) internal successors, (701), 568 states have internal predecessors, (701), 75 states have call successors, (75), 49 states have call predecessors, (75), 70 states have return successors, (99), 89 states have call predecessors, (99), 69 states have call successors, (99) [2022-01-31 23:44:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 875 transitions. [2022-01-31 23:44:11,779 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 875 transitions. Word has length 68 [2022-01-31 23:44:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:11,779 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 875 transitions. [2022-01-31 23:44:11,779 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) [2022-01-31 23:44:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 875 transitions. [2022-01-31 23:44:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:44:11,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:11,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:11,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 23:44:11,782 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 1 times [2022-01-31 23:44:11,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:11,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245400375] [2022-01-31 23:44:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:11,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:11,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:12,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:12,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245400375] [2022-01-31 23:44:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245400375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:12,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:12,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:44:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657337811] [2022-01-31 23:44:12,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:44:12,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:44:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:44:12,086 INFO L87 Difference]: Start difference. First operand 698 states and 875 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) [2022-01-31 23:44:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:14,391 INFO L93 Difference]: Finished difference Result 787 states and 1002 transitions. [2022-01-31 23:44:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:44:14,391 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 [2022-01-31 23:44:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:14,394 INFO L225 Difference]: With dead ends: 787 [2022-01-31 23:44:14,394 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 23:44:14,394 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 [2022-01-31 23:44:14,394 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 783 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 4113 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 4113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:14,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 2391 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 4113 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:44:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 23:44:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 696. [2022-01-31 23:44:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 551 states have (on average 1.2686025408348458) internal successors, (699), 567 states have internal predecessors, (699), 74 states have call successors, (74), 49 states have call predecessors, (74), 70 states have return successors, (98), 88 states have call predecessors, (98), 68 states have call successors, (98) [2022-01-31 23:44:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 871 transitions. [2022-01-31 23:44:14,627 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 871 transitions. Word has length 74 [2022-01-31 23:44:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:14,627 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 871 transitions. [2022-01-31 23:44:14,627 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) [2022-01-31 23:44:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 871 transitions. [2022-01-31 23:44:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 23:44:14,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:14,628 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] [2022-01-31 23:44:14,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 23:44:14,628 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 1 times [2022-01-31 23:44:14,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:14,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440454584] [2022-01-31 23:44:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:14,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:14,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 23:44:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:14,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440454584] [2022-01-31 23:44:14,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440454584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:14,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:14,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:44:14,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499946792] [2022-01-31 23:44:14,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:14,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:44:14,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:44:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:44:14,910 INFO L87 Difference]: Start difference. First operand 696 states and 871 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) [2022-01-31 23:44:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:17,490 INFO L93 Difference]: Finished difference Result 768 states and 970 transitions. [2022-01-31 23:44:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:44:17,491 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 [2022-01-31 23:44:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:17,492 INFO L225 Difference]: With dead ends: 768 [2022-01-31 23:44:17,492 INFO L226 Difference]: Without dead ends: 740 [2022-01-31 23:44:17,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:44:17,493 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 303 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:17,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 2885 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:44:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-31 23:44:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 692. [2022-01-31 23:44:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 548 states have (on average 1.2682481751824817) internal successors, (695), 564 states have internal predecessors, (695), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (97), 87 states have call predecessors, (97), 67 states have call successors, (97) [2022-01-31 23:44:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 865 transitions. [2022-01-31 23:44:17,732 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 865 transitions. Word has length 70 [2022-01-31 23:44:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:17,732 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 865 transitions. [2022-01-31 23:44:17,732 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) [2022-01-31 23:44:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 865 transitions. [2022-01-31 23:44:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:17,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:17,734 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] [2022-01-31 23:44:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 23:44:17,734 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 1 times [2022-01-31 23:44:17,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297949962] [2022-01-31 23:44:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:17,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:17,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 23:44:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:17,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297949962] [2022-01-31 23:44:17,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297949962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:17,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:17,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:17,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962921438] [2022-01-31 23:44:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:17,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:17,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:17,903 INFO L87 Difference]: Start difference. First operand 692 states and 865 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) [2022-01-31 23:44:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:19,366 INFO L93 Difference]: Finished difference Result 774 states and 973 transitions. [2022-01-31 23:44:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:19,367 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 [2022-01-31 23:44:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:19,369 INFO L225 Difference]: With dead ends: 774 [2022-01-31 23:44:19,369 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 23:44:19,369 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 [2022-01-31 23:44:19,370 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 923 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:19,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 1158 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:44:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 23:44:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 687. [2022-01-31 23:44:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 544 states have (on average 1.2683823529411764) internal successors, (690), 560 states have internal predecessors, (690), 72 states have call successors, (72), 49 states have call predecessors, (72), 70 states have return successors, (96), 86 states have call predecessors, (96), 66 states have call successors, (96) [2022-01-31 23:44:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 858 transitions. [2022-01-31 23:44:19,602 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 858 transitions. Word has length 69 [2022-01-31 23:44:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:19,602 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 858 transitions. [2022-01-31 23:44:19,602 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) [2022-01-31 23:44:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 858 transitions. [2022-01-31 23:44:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:19,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:19,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:19,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 23:44:19,603 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 1 times [2022-01-31 23:44:19,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591912080] [2022-01-31 23:44:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:19,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:19,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:44:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:19,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591912080] [2022-01-31 23:44:19,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591912080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:19,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:19,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:19,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585014127] [2022-01-31 23:44:19,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:19,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:19,813 INFO L87 Difference]: Start difference. First operand 687 states and 858 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) [2022-01-31 23:44:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:21,772 INFO L93 Difference]: Finished difference Result 762 states and 961 transitions. [2022-01-31 23:44:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:44:21,773 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 [2022-01-31 23:44:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:21,775 INFO L225 Difference]: With dead ends: 762 [2022-01-31 23:44:21,775 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 23:44:21,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:44:21,777 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 708 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 3394 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:21,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2104 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3394 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:44:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 23:44:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 684. [2022-01-31 23:44:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 542 states have (on average 1.2675276752767528) internal successors, (687), 558 states have internal predecessors, (687), 71 states have call successors, (71), 49 states have call predecessors, (71), 70 states have return successors, (95), 85 states have call predecessors, (95), 65 states have call successors, (95) [2022-01-31 23:44:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 853 transitions. [2022-01-31 23:44:22,010 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 853 transitions. Word has length 69 [2022-01-31 23:44:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:22,010 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 853 transitions. [2022-01-31 23:44:22,010 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) [2022-01-31 23:44:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 853 transitions. [2022-01-31 23:44:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:22,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:22,011 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] [2022-01-31 23:44:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 23:44:22,011 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 1 times [2022-01-31 23:44:22,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:22,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95481690] [2022-01-31 23:44:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:22,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:22,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:22,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:22,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95481690] [2022-01-31 23:44:22,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95481690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:22,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:22,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:22,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650575191] [2022-01-31 23:44:22,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:22,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:22,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:22,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:22,265 INFO L87 Difference]: Start difference. First operand 684 states and 853 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) [2022-01-31 23:44:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:24,179 INFO L93 Difference]: Finished difference Result 742 states and 935 transitions. [2022-01-31 23:44:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:44:24,179 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 [2022-01-31 23:44:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:24,181 INFO L225 Difference]: With dead ends: 742 [2022-01-31 23:44:24,181 INFO L226 Difference]: Without dead ends: 736 [2022-01-31 23:44:24,182 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 [2022-01-31 23:44:24,182 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 584 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 3725 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 3725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:24,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 1676 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 3725 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:44:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-31 23:44:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 681. [2022-01-31 23:44:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 539 states have (on average 1.261595547309833) internal successors, (680), 555 states have internal predecessors, (680), 71 states have call successors, (71), 49 states have call predecessors, (71), 70 states have return successors, (95), 85 states have call predecessors, (95), 65 states have call successors, (95) [2022-01-31 23:44:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 846 transitions. [2022-01-31 23:44:24,417 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 846 transitions. Word has length 69 [2022-01-31 23:44:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 846 transitions. [2022-01-31 23:44:24,417 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) [2022-01-31 23:44:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 846 transitions. [2022-01-31 23:44:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:24,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:24,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:24,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 23:44:24,419 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 1 times [2022-01-31 23:44:24,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:24,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731771981] [2022-01-31 23:44:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:24,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:24,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:24,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:24,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731771981] [2022-01-31 23:44:24,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731771981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:24,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:24,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:24,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822439619] [2022-01-31 23:44:24,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:24,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:24,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:24,607 INFO L87 Difference]: Start difference. First operand 681 states and 846 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) [2022-01-31 23:44:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:26,166 INFO L93 Difference]: Finished difference Result 808 states and 1021 transitions. [2022-01-31 23:44:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:44:26,166 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 [2022-01-31 23:44:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:26,168 INFO L225 Difference]: With dead ends: 808 [2022-01-31 23:44:26,168 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 23:44:26,168 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 [2022-01-31 23:44:26,168 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 1413 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:26,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 868 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 23:44:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 652. [2022-01-31 23:44:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 515 states have (on average 1.2601941747572816) internal successors, (649), 530 states have internal predecessors, (649), 70 states have call successors, (70), 48 states have call predecessors, (70), 66 states have return successors, (91), 81 states have call predecessors, (91), 64 states have call successors, (91) [2022-01-31 23:44:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 810 transitions. [2022-01-31 23:44:26,392 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 810 transitions. Word has length 69 [2022-01-31 23:44:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:26,392 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 810 transitions. [2022-01-31 23:44:26,392 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) [2022-01-31 23:44:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 810 transitions. [2022-01-31 23:44:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:26,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:26,394 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] [2022-01-31 23:44:26,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 23:44:26,394 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 1 times [2022-01-31 23:44:26,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:26,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046011579] [2022-01-31 23:44:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:26,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:26,396 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:26,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:26,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046011579] [2022-01-31 23:44:26,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046011579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:26,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:26,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:44:26,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303112285] [2022-01-31 23:44:26,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:26,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:44:26,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:44:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:44:26,537 INFO L87 Difference]: Start difference. First operand 652 states and 810 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-01-31 23:44:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:27,849 INFO L93 Difference]: Finished difference Result 726 states and 913 transitions. [2022-01-31 23:44:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:44:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 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 69 [2022-01-31 23:44:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:27,851 INFO L225 Difference]: With dead ends: 726 [2022-01-31 23:44:27,851 INFO L226 Difference]: Without dead ends: 686 [2022-01-31 23:44:27,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:27,852 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 1033 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:27,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 865 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-31 23:44:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 634. [2022-01-31 23:44:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 502 states have (on average 1.252988047808765) internal successors, (629), 516 states have internal predecessors, (629), 69 states have call successors, (69), 47 states have call predecessors, (69), 62 states have return successors, (87), 77 states have call predecessors, (87), 63 states have call successors, (87) [2022-01-31 23:44:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 785 transitions. [2022-01-31 23:44:28,103 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 785 transitions. Word has length 69 [2022-01-31 23:44:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:28,103 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 785 transitions. [2022-01-31 23:44:28,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-01-31 23:44:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 785 transitions. [2022-01-31 23:44:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:28,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:28,104 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] [2022-01-31 23:44:28,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 23:44:28,105 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 1 times [2022-01-31 23:44:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163548538] [2022-01-31 23:44:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:28,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:28,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:28,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:28,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163548538] [2022-01-31 23:44:28,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163548538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:28,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:28,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:28,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19670118] [2022-01-31 23:44:28,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:28,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:28,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:28,276 INFO L87 Difference]: Start difference. First operand 634 states and 785 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) [2022-01-31 23:44:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:29,480 INFO L93 Difference]: Finished difference Result 724 states and 902 transitions. [2022-01-31 23:44:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:44:29,481 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 [2022-01-31 23:44:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:29,482 INFO L225 Difference]: With dead ends: 724 [2022-01-31 23:44:29,482 INFO L226 Difference]: Without dead ends: 686 [2022-01-31 23:44:29,483 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 [2022-01-31 23:44:29,483 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 1136 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:29,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 1028 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:44:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-31 23:44:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 634. [2022-01-31 23:44:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 502 states have (on average 1.250996015936255) internal successors, (628), 516 states have internal predecessors, (628), 69 states have call successors, (69), 47 states have call predecessors, (69), 62 states have return successors, (87), 77 states have call predecessors, (87), 63 states have call successors, (87) [2022-01-31 23:44:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 784 transitions. [2022-01-31 23:44:29,724 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 784 transitions. Word has length 71 [2022-01-31 23:44:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:29,724 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 784 transitions. [2022-01-31 23:44:29,724 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) [2022-01-31 23:44:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 784 transitions. [2022-01-31 23:44:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:29,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:29,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:29,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 23:44:29,725 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 1 times [2022-01-31 23:44:29,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51901064] [2022-01-31 23:44:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:29,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:29,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:29,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:29,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51901064] [2022-01-31 23:44:29,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51901064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:29,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:29,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:44:29,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965857064] [2022-01-31 23:44:29,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:29,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:44:29,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:29,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:44:29,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:44:29,999 INFO L87 Difference]: Start difference. First operand 634 states and 784 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) [2022-01-31 23:44:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:32,380 INFO L93 Difference]: Finished difference Result 722 states and 908 transitions. [2022-01-31 23:44:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:44:32,381 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 [2022-01-31 23:44:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:32,382 INFO L225 Difference]: With dead ends: 722 [2022-01-31 23:44:32,382 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 23:44:32,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:44:32,383 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 716 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 4942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:32,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2710 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:44:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 23:44:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 629. [2022-01-31 23:44:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 498 states have (on average 1.2469879518072289) internal successors, (621), 512 states have internal predecessors, (621), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-01-31 23:44:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 774 transitions. [2022-01-31 23:44:32,627 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 774 transitions. Word has length 71 [2022-01-31 23:44:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:32,627 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 774 transitions. [2022-01-31 23:44:32,627 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) [2022-01-31 23:44:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 774 transitions. [2022-01-31 23:44:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:32,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:32,628 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] [2022-01-31 23:44:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 23:44:32,628 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 1 times [2022-01-31 23:44:32,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062226120] [2022-01-31 23:44:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:32,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:32,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:32,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062226120] [2022-01-31 23:44:32,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062226120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:32,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:32,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:32,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786470894] [2022-01-31 23:44:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:32,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:32,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:32,828 INFO L87 Difference]: Start difference. First operand 629 states and 774 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) [2022-01-31 23:44:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:33,952 INFO L93 Difference]: Finished difference Result 717 states and 888 transitions. [2022-01-31 23:44:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:33,952 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 [2022-01-31 23:44:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:33,954 INFO L225 Difference]: With dead ends: 717 [2022-01-31 23:44:33,954 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 23:44:33,954 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 [2022-01-31 23:44:33,954 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 493 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:33,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 1008 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:44:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 23:44:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 623. [2022-01-31 23:44:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 493 states have (on average 1.2474645030425964) internal successors, (615), 507 states have internal predecessors, (615), 67 states have call successors, (67), 47 states have call predecessors, (67), 62 states have return successors, (84), 75 states have call predecessors, (84), 61 states have call successors, (84) [2022-01-31 23:44:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 766 transitions. [2022-01-31 23:44:34,188 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 766 transitions. Word has length 71 [2022-01-31 23:44:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 766 transitions. [2022-01-31 23:44:34,189 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) [2022-01-31 23:44:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 766 transitions. [2022-01-31 23:44:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:34,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:34,190 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] [2022-01-31 23:44:34,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 23:44:34,190 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 1 times [2022-01-31 23:44:34,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003543730] [2022-01-31 23:44:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:34,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:34,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:34,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003543730] [2022-01-31 23:44:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1003543730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:34,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:34,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:34,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236109944] [2022-01-31 23:44:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:34,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:34,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:34,476 INFO L87 Difference]: Start difference. First operand 623 states and 766 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 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) [2022-01-31 23:44:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:36,579 INFO L93 Difference]: Finished difference Result 854 states and 1053 transitions. [2022-01-31 23:44:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:44:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 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 71 [2022-01-31 23:44:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:36,581 INFO L225 Difference]: With dead ends: 854 [2022-01-31 23:44:36,581 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 23:44:36,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:44:36,582 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 762 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 3748 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1913 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3748 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:44:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 23:44:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 629. [2022-01-31 23:44:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 499 states have (on average 1.2364729458917836) internal successors, (617), 513 states have internal predecessors, (617), 67 states have call successors, (67), 47 states have call predecessors, (67), 62 states have return successors, (84), 75 states have call predecessors, (84), 61 states have call successors, (84) [2022-01-31 23:44:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 768 transitions. [2022-01-31 23:44:36,828 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 768 transitions. Word has length 71 [2022-01-31 23:44:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 768 transitions. [2022-01-31 23:44:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 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) [2022-01-31 23:44:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 768 transitions. [2022-01-31 23:44:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:36,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:36,830 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] [2022-01-31 23:44:36,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 23:44:36,830 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 1 times [2022-01-31 23:44:36,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138633066] [2022-01-31 23:44:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:36,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:36,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 23:44:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:37,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:37,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138633066] [2022-01-31 23:44:37,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138633066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:37,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:37,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:37,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313095943] [2022-01-31 23:44:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:37,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:37,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:37,016 INFO L87 Difference]: Start difference. First operand 629 states and 768 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) [2022-01-31 23:44:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:38,371 INFO L93 Difference]: Finished difference Result 717 states and 882 transitions. [2022-01-31 23:44:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:38,372 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 [2022-01-31 23:44:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:38,374 INFO L225 Difference]: With dead ends: 717 [2022-01-31 23:44:38,374 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 23:44:38,374 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 [2022-01-31 23:44:38,379 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 619 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:38,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1329 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 23:44:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 617. [2022-01-31 23:44:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 488 states have (on average 1.2315573770491803) internal successors, (601), 502 states have internal predecessors, (601), 66 states have call successors, (66), 47 states have call predecessors, (66), 62 states have return successors, (83), 74 states have call predecessors, (83), 60 states have call successors, (83) [2022-01-31 23:44:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 750 transitions. [2022-01-31 23:44:38,602 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 750 transitions. Word has length 73 [2022-01-31 23:44:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:38,602 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 750 transitions. [2022-01-31 23:44:38,602 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) [2022-01-31 23:44:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 750 transitions. [2022-01-31 23:44:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 23:44:38,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:38,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 23:44:38,603 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 1 times [2022-01-31 23:44:38,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:38,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550203549] [2022-01-31 23:44:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:38,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:38,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:38,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:38,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550203549] [2022-01-31 23:44:38,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [550203549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:38,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:38,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:44:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420731098] [2022-01-31 23:44:38,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:38,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:44:38,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:44:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:38,894 INFO L87 Difference]: Start difference. First operand 617 states and 750 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) [2022-01-31 23:44:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:40,824 INFO L93 Difference]: Finished difference Result 687 states and 846 transitions. [2022-01-31 23:44:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:40,824 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 [2022-01-31 23:44:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:40,825 INFO L225 Difference]: With dead ends: 687 [2022-01-31 23:44:40,825 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 23:44:40,826 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 [2022-01-31 23:44:40,826 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 545 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 3919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:40,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2197 Invalid, 3919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 3701 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:44:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 23:44:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 615. [2022-01-31 23:44:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 487 states have (on average 1.2299794661190966) internal successors, (599), 501 states have internal predecessors, (599), 65 states have call successors, (65), 47 states have call predecessors, (65), 62 states have return successors, (82), 73 states have call predecessors, (82), 59 states have call successors, (82) [2022-01-31 23:44:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 746 transitions. [2022-01-31 23:44:41,049 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 746 transitions. Word has length 72 [2022-01-31 23:44:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:41,049 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 746 transitions. [2022-01-31 23:44:41,049 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) [2022-01-31 23:44:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 746 transitions. [2022-01-31 23:44:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:41,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:41,051 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] [2022-01-31 23:44:41,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 23:44:41,051 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 1 times [2022-01-31 23:44:41,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538983502] [2022-01-31 23:44:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:41,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:41,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:41,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538983502] [2022-01-31 23:44:41,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538983502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:41,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:41,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:44:41,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141280401] [2022-01-31 23:44:41,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:41,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:44:41,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:44:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:41,319 INFO L87 Difference]: Start difference. First operand 615 states and 746 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) [2022-01-31 23:44:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:45,244 INFO L93 Difference]: Finished difference Result 1500 states and 1828 transitions. [2022-01-31 23:44:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 23:44:45,245 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 [2022-01-31 23:44:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:45,248 INFO L225 Difference]: With dead ends: 1500 [2022-01-31 23:44:45,248 INFO L226 Difference]: Without dead ends: 1353 [2022-01-31 23:44:45,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=676, Invalid=2630, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:44:45,248 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 1957 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 3816 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 4382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 3816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1962 Valid, 1344 Invalid, 4382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 3816 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:44:45,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2022-01-31 23:44:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 974. [2022-01-31 23:44:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 775 states have (on average 1.2490322580645161) internal successors, (968), 798 states have internal predecessors, (968), 99 states have call successors, (99), 77 states have call predecessors, (99), 99 states have return successors, (130), 105 states have call predecessors, (130), 93 states have call successors, (130) [2022-01-31 23:44:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1197 transitions. [2022-01-31 23:44:45,600 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1197 transitions. Word has length 73 [2022-01-31 23:44:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1197 transitions. [2022-01-31 23:44:45,600 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) [2022-01-31 23:44:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1197 transitions. [2022-01-31 23:44:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:45,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:45,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:45,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 23:44:45,602 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 1 times [2022-01-31 23:44:45,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:45,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026502923] [2022-01-31 23:44:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:45,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:45,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:45,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:45,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026502923] [2022-01-31 23:44:45,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026502923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:45,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:45,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:44:45,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66421248] [2022-01-31 23:44:45,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:45,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:44:45,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:44:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:44:45,776 INFO L87 Difference]: Start difference. First operand 974 states and 1197 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) [2022-01-31 23:44:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:48,301 INFO L93 Difference]: Finished difference Result 1373 states and 1682 transitions. [2022-01-31 23:44:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:44:48,301 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 [2022-01-31 23:44:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:48,304 INFO L225 Difference]: With dead ends: 1373 [2022-01-31 23:44:48,304 INFO L226 Difference]: Without dead ends: 1243 [2022-01-31 23:44:48,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:44:48,304 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 2264 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:48,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2268 Valid, 1517 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:44:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-01-31 23:44:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1067. [2022-01-31 23:44:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 848 states have (on average 1.2382075471698113) internal successors, (1050), 866 states have internal predecessors, (1050), 113 states have call successors, (113), 81 states have call predecessors, (113), 105 states have return successors, (146), 124 states have call predecessors, (146), 107 states have call successors, (146) [2022-01-31 23:44:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1309 transitions. [2022-01-31 23:44:48,788 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1309 transitions. Word has length 73 [2022-01-31 23:44:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:48,789 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1309 transitions. [2022-01-31 23:44:48,789 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) [2022-01-31 23:44:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1309 transitions. [2022-01-31 23:44:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 23:44:48,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:48,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:48,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 23:44:48,791 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 1 times [2022-01-31 23:44:48,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:48,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764281966] [2022-01-31 23:44:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:48,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:48,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:48,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764281966] [2022-01-31 23:44:48,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [764281966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:48,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:44:48,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026131590] [2022-01-31 23:44:48,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:48,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:44:48,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:44:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:44:48,970 INFO L87 Difference]: Start difference. First operand 1067 states and 1309 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) [2022-01-31 23:44:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:50,663 INFO L93 Difference]: Finished difference Result 1218 states and 1511 transitions. [2022-01-31 23:44:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:44:50,663 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 [2022-01-31 23:44:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:50,665 INFO L225 Difference]: With dead ends: 1218 [2022-01-31 23:44:50,665 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 23:44:50,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:50,666 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 585 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:50,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 1456 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 23:44:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1049. [2022-01-31 23:44:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 834 states have (on average 1.2374100719424461) internal successors, (1032), 852 states have internal predecessors, (1032), 109 states have call successors, (109), 81 states have call predecessors, (109), 105 states have return successors, (140), 120 states have call predecessors, (140), 103 states have call successors, (140) [2022-01-31 23:44:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1281 transitions. [2022-01-31 23:44:51,108 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1281 transitions. Word has length 75 [2022-01-31 23:44:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:51,108 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1281 transitions. [2022-01-31 23:44:51,108 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) [2022-01-31 23:44:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1281 transitions. [2022-01-31 23:44:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:51,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:51,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:51,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 23:44:51,110 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 1 times [2022-01-31 23:44:51,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241661198] [2022-01-31 23:44:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:51,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:51,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:44:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:51,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:51,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241661198] [2022-01-31 23:44:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241661198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:51,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059896967] [2022-01-31 23:44:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:51,270 INFO L87 Difference]: Start difference. First operand 1049 states and 1281 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) [2022-01-31 23:44:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:52,758 INFO L93 Difference]: Finished difference Result 1178 states and 1455 transitions. [2022-01-31 23:44:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:52,759 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 [2022-01-31 23:44:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:52,761 INFO L225 Difference]: With dead ends: 1178 [2022-01-31 23:44:52,762 INFO L226 Difference]: Without dead ends: 1117 [2022-01-31 23:44:52,762 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 [2022-01-31 23:44:52,762 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 702 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:52,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1061 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:44:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-31 23:44:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1033. [2022-01-31 23:44:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 820 states have (on average 1.2365853658536585) internal successors, (1014), 838 states have internal predecessors, (1014), 107 states have call successors, (107), 81 states have call predecessors, (107), 105 states have return successors, (136), 118 states have call predecessors, (136), 101 states have call successors, (136) [2022-01-31 23:44:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1257 transitions. [2022-01-31 23:44:53,174 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1257 transitions. Word has length 73 [2022-01-31 23:44:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1257 transitions. [2022-01-31 23:44:53,174 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) [2022-01-31 23:44:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1257 transitions. [2022-01-31 23:44:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:53,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:53,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:53,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 23:44:53,176 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 1 times [2022-01-31 23:44:53,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916692552] [2022-01-31 23:44:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:53,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:53,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 23:44:53,187 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 23:44:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 23:44:53,252 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 23:44:53,252 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 23:44:53,257 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:44:53,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 23:44:53,261 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:53,262 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:44:53,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:44:53 BoogieIcfgContainer [2022-01-31 23:44:53,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:44:53,292 INFO L158 Benchmark]: Toolchain (without parser) took 160622.77ms. Allocated memory was 197.1MB in the beginning and 615.5MB in the end (delta: 418.4MB). Free memory was 147.3MB in the beginning and 337.3MB in the end (delta: -189.9MB). Peak memory consumption was 229.5MB. Max. memory is 8.0GB. [2022-01-31 23:44:53,292 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 165.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:44:53,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 476.95ms. Allocated memory is still 197.1MB. Free memory was 147.0MB in the beginning and 157.2MB in the end (delta: -10.1MB). Peak memory consumption was 14.8MB. Max. memory is 8.0GB. [2022-01-31 23:44:53,292 INFO L158 Benchmark]: Boogie Preprocessor took 64.07ms. Allocated memory is still 197.1MB. Free memory was 157.2MB in the beginning and 152.5MB in the end (delta: 4.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-01-31 23:44:53,292 INFO L158 Benchmark]: RCFGBuilder took 1006.70ms. Allocated memory is still 197.1MB. Free memory was 152.5MB in the beginning and 87.4MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. [2022-01-31 23:44:53,292 INFO L158 Benchmark]: TraceAbstraction took 159066.64ms. Allocated memory was 197.1MB in the beginning and 615.5MB in the end (delta: 418.4MB). Free memory was 86.9MB in the beginning and 337.3MB in the end (delta: -250.3MB). Peak memory consumption was 168.6MB. Max. memory is 8.0GB. [2022-01-31 23:44:53,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 165.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 476.95ms. Allocated memory is still 197.1MB. Free memory was 147.0MB in the beginning and 157.2MB in the end (delta: -10.1MB). Peak memory consumption was 14.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 64.07ms. Allocated memory is still 197.1MB. Free memory was 157.2MB in the beginning and 152.5MB in the end (delta: 4.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 1006.70ms. Allocated memory is still 197.1MB. Free memory was 152.5MB in the beginning and 87.4MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. * TraceAbstraction took 159066.64ms. Allocated memory was 197.1MB in the beginning and 615.5MB in the end (delta: 418.4MB). Free memory was 86.9MB in the beginning and 337.3MB in the end (delta: -250.3MB). Peak memory consumption was 168.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 59]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int s ; [L33] int UNLOADED ; [L34] int NP ; [L35] int DC ; [L36] int SKIP1 ; [L37] int SKIP2 ; [L38] int MPR1 ; [L39] int MPR3 ; [L40] int IPC ; [L41] int pended ; [L42] int compFptr ; [L43] int compRegistered ; [L44] int lowerDriverReturn ; [L45] int setEventCalled ; [L46] int customIrp ; [L47] int routine ; [L48] int myStatus ; [L49] int pirp ; [L50] int Executive ; [L51] int Suspended ; [L52] int KernelMode ; [L53] int DeviceUsageTypePaging ; [L1718] int pirp__IoStatus__Status ; [L1719] int d = __VERIFIER_nondet_int() ; [L1720] int status = __VERIFIER_nondet_int() ; [L1721] int irp = __VERIFIER_nondet_int() ; [L1722] int we_should_unload = __VERIFIER_nondet_int() ; [L1723] int irp_choice = __VERIFIER_nondet_int() ; [L1724] int devobj = __VERIFIER_nondet_int() ; [L1725] int __cil_tmp9 ; [L1730] s = 0 [L1731] UNLOADED = 0 [L1732] NP = 0 [L1733] DC = 0 [L1734] SKIP1 = 0 [L1735] SKIP2 = 0 [L1736] MPR1 = 0 [L1737] MPR3 = 0 [L1738] IPC = 0 [L1739] pended = 0 [L1740] compFptr = 0 [L1741] compRegistered = 0 [L1742] lowerDriverReturn = 0 [L1743] setEventCalled = 0 [L1744] customIrp = 0 [L1745] routine = 0 [L1746] myStatus = 0 [L1747] pirp = 0 [L1748] Executive = 0 [L1749] Suspended = 5 [L1750] KernelMode = 0 [L1751] DeviceUsageTypePaging = 1 [L1754] pirp = irp [L1755] CALL _BLAST_init() [L67] UNLOADED = 0 [L68] NP = 1 [L69] DC = 2 [L70] SKIP1 = 3 [L71] SKIP2 = 4 [L72] MPR1 = 5 [L73] MPR3 = 6 [L74] IPC = 7 [L75] s = UNLOADED [L76] pended = 0 [L77] compFptr = 0 [L78] compRegistered = 0 [L79] lowerDriverReturn = 0 [L80] setEventCalled = 0 [L81] customIrp = 0 [L1755] RET _BLAST_init() [L1757] COND TRUE status >= 0 [L1758] s = NP [L1759] customIrp = 0 [L1760] setEventCalled = customIrp [L1761] lowerDriverReturn = setEventCalled [L1762] compRegistered = lowerDriverReturn [L1763] compFptr = compRegistered [L1764] pended = compFptr [L1765] pirp__IoStatus__Status = 0 [L1766] myStatus = 0 [L1767] COND TRUE irp_choice == 0 [L1768] pirp__IoStatus__Status = -1073741637 [L1769] myStatus = -1073741637 [L1772] CALL stub_driver_init() [L1707] s = NP [L1708] customIrp = 0 [L1709] setEventCalled = customIrp [L1710] lowerDriverReturn = setEventCalled [L1711] compRegistered = lowerDriverReturn [L1712] compFptr = compRegistered [L1713] pended = compFptr [L1772] RET stub_driver_init() [L1775] COND FALSE !(status < 0) [L1779] int tmp_ndt_1; [L1780] tmp_ndt_1 = __VERIFIER_nondet_int() [L1781] COND TRUE tmp_ndt_1 == 2 [L1798] CALL, EXPR CdAudioDeviceControl(devobj, pirp) [L313] int deviceExtension__Active = __VERIFIER_nondet_int() ; [L314] int status ; [L317] COND FALSE !(deviceExtension__Active == 2) [L320] COND FALSE !(deviceExtension__Active == 3) [L323] COND FALSE !(deviceExtension__Active == 1) [L326] COND TRUE deviceExtension__Active == 7 [L348] CALL, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L1591] int currentIrpStack__Parameters__DeviceIoControl__IoControlCode = __VERIFIER_nondet_int() ; [L1592] int deviceExtension__TargetDeviceObject = __VERIFIER_nondet_int() ; [L1593] int irpSp__Control ; [L1594] int tmp ; [L1595] int tmp___0 ; [L1596] int __cil_tmp8 ; [L1597] int __cil_tmp9 ; [L1598] int __cil_tmp10 ; [L1599] int __cil_tmp11 ; [L1600] int __cil_tmp12 ; [L1604] __cil_tmp8 = 56 [L1605] __cil_tmp9 = 16384 [L1606] __cil_tmp10 = 131072 [L1607] __cil_tmp11 = 147456 [L1608] __cil_tmp12 = 147512 [L1609] COND TRUE currentIrpStack__Parameters__DeviceIoControl__IoControlCode == __cil_tmp12 [L1610] COND FALSE !(s != NP) [L1615] COND FALSE !(compRegistered != 0) [L1620] compRegistered = 1 [L1621] routine = 0 [L1625] irpSp__Control = 224 [L1626] CALL, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1900] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1901] int returnVal2 ; [L1902] int compRetStatus ; [L1903] int lcontext = __VERIFIER_nondet_int() ; [L1904] unsigned long __cil_tmp8 ; [L1907] COND TRUE \read(compRegistered) [L1908] COND TRUE routine == 0 [L1910] CALL, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1569] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1570] int Irp__AssociatedIrp__SystemBuffer = __VERIFIER_nondet_int() ; [L1573] COND TRUE \read(Irp__PendingReturned) [L1574] COND TRUE pended == 0 [L1575] pended = 1 [L1582] COND FALSE !(myStatus >= 0) [L1587] return (myStatus); [L1910] RET, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1910] compRetStatus = HPCdrCompletion(DeviceObject, Irp, lcontext) [L1920] __cil_tmp8 = (unsigned long )compRetStatus [L1921] COND FALSE !(__cil_tmp8 == -1073741802) [L1928] COND FALSE !(\read(Irp__PendingReturned)) [L1931] int tmp_ndt_4; [L1932] tmp_ndt_4 = __VERIFIER_nondet_int() [L1933] COND TRUE tmp_ndt_4 == 0 [L1944] returnVal2 = 0 [L1958] COND TRUE s == NP [L1959] s = IPC [L1960] lowerDriverReturn = returnVal2 [L1981] return (returnVal2); [L1626] RET, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1626] tmp = IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1628] return (tmp); [L348] RET, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L348] status = CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L363] return (status); [L1798] RET, EXPR CdAudioDeviceControl(devobj, pirp) [L1798] status = CdAudioDeviceControl(devobj, pirp) [L1819] COND FALSE !(\read(we_should_unload)) [L1825] COND TRUE pended == 1 [L1826] COND FALSE !(s == NP) [L1833] COND TRUE pended == 1 [L1834] COND FALSE !(s == MPR3) [L1841] COND TRUE s != UNLOADED [L1842] COND TRUE status != -1 [L1843] COND TRUE s != SKIP2 [L1844] COND FALSE !(s != IPC) [L1857] COND FALSE !(pended != 1) [L1869] COND TRUE status != 259 [L1871] CALL errorFn() [L59] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 520 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 159.0s, OverallIterations: 67, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 131.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73270 SdHoareTripleChecker+Valid, 99.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72855 mSDsluCounter, 116848 SdHoareTripleChecker+Invalid, 84.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78105 mSDsCounter, 25585 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 181965 IncrementalHoareTripleChecker+Invalid, 207550 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25585 mSolverCounterUnsat, 38743 mSDtfsCounter, 181965 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1740 GetRequests, 651 SyntacticMatches, 14 SemanticMatches, 1075 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1067occurred in iteration=64, InterpolantAutomatonStates: 884, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.9s AutomataMinimizationTime, 66 MinimizatonAttempts, 8654 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-31 23:44:53,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...