/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:42:11,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:42:11,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:42:11,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:42:11,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:42:11,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:42:11,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:42:11,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:42:11,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:42:11,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:42:11,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:42:11,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:42:11,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:42:11,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:42:11,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:42:11,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:42:11,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:42:11,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:42:11,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:42:11,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:42:11,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:42:11,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:42:11,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:42:11,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:42:11,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:42:11,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:42:11,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:42:11,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:42:11,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:42:11,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:42:11,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:42:11,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:42:11,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:42:11,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:42:11,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:42:11,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:42:11,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:42:11,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:42:11,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:42:11,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:42:11,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:42:11,940 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 23:42:11,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:42:11,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:42:11,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:42:11,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:42:11,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:11,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:42:11,951 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:42:11,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:42:12,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:42:12,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:42:12,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:42:12,193 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:42:12,194 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:42:12,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-01-31 23:42:12,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d589c01d7/642d296b22364af0882dac97ad42ed00/FLAG338d4f61b [2022-01-31 23:42:12,675 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:42:12,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-01-31 23:42:12,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d589c01d7/642d296b22364af0882dac97ad42ed00/FLAG338d4f61b [2022-01-31 23:42:12,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d589c01d7/642d296b22364af0882dac97ad42ed00 [2022-01-31 23:42:12,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:42:12,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:42:12,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:12,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:42:12,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:42:12,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:12" (1/1) ... [2022-01-31 23:42:12,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d94458a 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 23:42:12,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:42:12" (1/1) ... [2022-01-31 23:42:12,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:42:12,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:42:12,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-01-31 23:42:13,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:13,040 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:42:13,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-01-31 23:42:13,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:42:13,121 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:42:13,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:42:13 WrapperNode [2022-01-31 23:42:13,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:42:13,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:42:13,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:42:13,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:42:13,132 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 23:42:13,132 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 23:42:13,146 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 23:42:13,146 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 23:42:13,167 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 23:42:13,177 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 23:42:13,181 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 23:42:13,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:42:13,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:42:13,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:42:13,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:42:13,202 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 23:42:13,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:42:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:42:13,246 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 23:42:13,266 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 23:42:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:42:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:42:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:42:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-01-31 23:42:13,278 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-01-31 23:42:13,278 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-01-31 23:42:13,278 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-01-31 23:42:13,278 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-01-31 23:42:13,278 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-01-31 23:42:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-01-31 23:42:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-01-31 23:42:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-01-31 23:42:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-01-31 23:42:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-01-31 23:42:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-01-31 23:42:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-01-31 23:42:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-01-31 23:42:13,280 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-01-31 23:42:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-01-31 23:42:13,283 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-01-31 23:42:13,283 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-01-31 23:42:13,283 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-01-31 23:42:13,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 23:42:13,283 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-01-31 23:42:13,284 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:42:13,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:42:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:42:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:42:13,523 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:42:13,524 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:42:13,623 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,665 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-01-31 23:42:13,665 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-01-31 23:42:13,668 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,689 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-01-31 23:42:13,689 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-01-31 23:42:13,704 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##16: assume !false; [2022-01-31 23:42:13,714 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-01-31 23:42:13,751 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,775 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-01-31 23:42:13,775 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-01-31 23:42:13,776 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-01-31 23:42:13,781 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,907 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-01-31 23:42:13,907 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-01-31 23:42:13,909 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,930 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-01-31 23:42:13,930 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-01-31 23:42:13,950 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:13,964 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-01-31 23:42:13,964 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-01-31 23:42:13,967 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,085 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-01-31 23:42:14,085 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-01-31 23:42:14,093 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 23:42:14,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-01-31 23:42:14,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-01-31 23:42:14,114 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:42:14,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:42:14,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:42:14,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:42:14 BoogieIcfgContainer [2022-01-31 23:42:14,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:42:14,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:42:14,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:42:14,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:42:14,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:42:12" (1/3) ... [2022-01-31 23:42:14,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548933fe 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 23:42:14,128 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 23:42:14,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548933fe 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 23:42:14,129 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 23:42:14,129 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-01-31 23:42:14,133 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:42:14,133 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:42:14,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:42:14,176 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 23:42:14,176 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:42:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 23:42:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 23:42:14,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:14,213 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] [2022-01-31 23:42:14,213 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-01-31 23:42:14,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233578896] [2022-01-31 23:42:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:14,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:14,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:14,591 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 23:42:14,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233578896] [2022-01-31 23:42:14,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233578896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:14,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 23:42:14,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128673709] [2022-01-31 23:42:14,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:14,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 23:42:14,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 23:42:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:42:14,621 INFO L87 Difference]: Start difference. First operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 23:42:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:16,382 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-01-31 23:42:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:16,385 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 23:42:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:16,396 INFO L225 Difference]: With dead ends: 1043 [2022-01-31 23:42:16,396 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 23:42:16,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:16,404 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:16,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 23:42:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-01-31 23:42:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 377 states have (on average 1.4562334217506632) internal successors, (549), 395 states have internal predecessors, (549), 102 states have call successors, (102), 29 states have call predecessors, (102), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-31 23:42:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-01-31 23:42:16,505 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-01-31 23:42:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:16,506 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-01-31 23:42:16,506 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 23:42:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-01-31 23:42:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 23:42:16,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:16,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 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 23:42:16,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:42:16,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-01-31 23:42:16,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:16,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154935699] [2022-01-31 23:42:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:16,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:16,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:16,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154935699] [2022-01-31 23:42:16,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154935699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:16,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:16,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:16,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695023520] [2022-01-31 23:42:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:16,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:16,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:16,657 INFO L87 Difference]: Start difference. First operand 507 states and 737 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:18,182 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-01-31 23:42:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:18,182 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 23:42:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:18,188 INFO L225 Difference]: With dead ends: 961 [2022-01-31 23:42:18,188 INFO L226 Difference]: Without dead ends: 842 [2022-01-31 23:42:18,189 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 23:42:18,190 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 1480 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:18,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1029 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:42:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-31 23:42:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-01-31 23:42:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 501 states have (on average 1.407185628742515) internal successors, (705), 508 states have internal predecessors, (705), 111 states have call successors, (111), 40 states have call predecessors, (111), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-01-31 23:42:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-01-31 23:42:18,285 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-01-31 23:42:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:18,286 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-01-31 23:42:18,286 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 23:42:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-01-31 23:42:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 23:42:18,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:18,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 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 23:42:18,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:42:18,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-01-31 23:42:18,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993262669] [2022-01-31 23:42:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:18,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:18,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:18,438 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 23:42:18,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993262669] [2022-01-31 23:42:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993262669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:18,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:18,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:18,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840475682] [2022-01-31 23:42:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:18,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:18,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:18,440 INFO L87 Difference]: Start difference. First operand 662 states and 961 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:19,816 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-01-31 23:42:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:19,816 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 23:42:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:19,820 INFO L225 Difference]: With dead ends: 1142 [2022-01-31 23:42:19,821 INFO L226 Difference]: Without dead ends: 966 [2022-01-31 23:42:19,821 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 23:42:19,822 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:19,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 861 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:42:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-01-31 23:42:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-01-31 23:42:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 610 states have (on average 1.4032786885245903) internal successors, (856), 613 states have internal predecessors, (856), 113 states have call successors, (113), 46 states have call predecessors, (113), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-01-31 23:42:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-01-31 23:42:19,881 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-01-31 23:42:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:19,881 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-01-31 23:42:19,882 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 23:42:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-01-31 23:42:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:42:19,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:19,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:42:19,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-01-31 23:42:19,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557419206] [2022-01-31 23:42:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:19,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:19,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:19,974 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 23:42:19,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557419206] [2022-01-31 23:42:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557419206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:19,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:19,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:19,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554407104] [2022-01-31 23:42:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:19,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:19,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:19,976 INFO L87 Difference]: Start difference. First operand 787 states and 1132 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:22,270 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-01-31 23:42:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:42:22,271 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 23:42:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:22,277 INFO L225 Difference]: With dead ends: 1624 [2022-01-31 23:42:22,277 INFO L226 Difference]: Without dead ends: 1340 [2022-01-31 23:42:22,279 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 23:42:22,279 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 746 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:22,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1256 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:42:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-01-31 23:42:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-01-31 23:42:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 707 states have (on average 1.413012729844413) internal successors, (999), 709 states have internal predecessors, (999), 126 states have call successors, (126), 54 states have call predecessors, (126), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-01-31 23:42:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-01-31 23:42:22,369 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-01-31 23:42:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:22,370 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-01-31 23:42:22,370 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 23:42:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-01-31 23:42:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 23:42:22,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:22,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:42:22,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-01-31 23:42:22,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:22,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829322231] [2022-01-31 23:42:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:22,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:22,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:22,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:22,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:22,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:22,556 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 23:42:22,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829322231] [2022-01-31 23:42:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [829322231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:22,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017378574] [2022-01-31 23:42:22,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:22,559 INFO L87 Difference]: Start difference. First operand 905 states and 1345 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:42:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:24,338 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-01-31 23:42:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:24,338 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 23:42:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:24,343 INFO L225 Difference]: With dead ends: 1626 [2022-01-31 23:42:24,343 INFO L226 Difference]: Without dead ends: 1042 [2022-01-31 23:42:24,345 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 23:42:24,345 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 2491 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:24,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 991 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:42:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-01-31 23:42:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-01-31 23:42:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 648 states have (on average 1.3981481481481481) internal successors, (906), 651 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-01-31 23:42:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-01-31 23:42:24,427 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-01-31 23:42:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:24,427 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-01-31 23:42:24,427 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 23:42:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-01-31 23:42:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:42:24,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:24,429 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] [2022-01-31 23:42:24,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:42:24,429 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-01-31 23:42:24,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:24,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310161901] [2022-01-31 23:42:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:24,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:24,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:24,550 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 23:42:24,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:24,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310161901] [2022-01-31 23:42:24,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310161901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:24,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:24,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:24,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250705206] [2022-01-31 23:42:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:24,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:24,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:24,562 INFO L87 Difference]: Start difference. First operand 833 states and 1200 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:25,928 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-01-31 23:42:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:25,928 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 23:42:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:25,933 INFO L225 Difference]: With dead ends: 963 [2022-01-31 23:42:25,933 INFO L226 Difference]: Without dead ends: 959 [2022-01-31 23:42:25,934 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 23:42:25,936 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1150 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:25,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 952 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:42:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-31 23:42:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-01-31 23:42:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 648 states have (on average 1.3950617283950617) internal successors, (904), 650 states have internal predecessors, (904), 116 states have call successors, (116), 50 states have call predecessors, (116), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-01-31 23:42:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-01-31 23:42:26,019 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-01-31 23:42:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:26,020 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-01-31 23:42:26,020 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 23:42:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-01-31 23:42:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 23:42:26,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:26,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:26,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:42:26,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-01-31 23:42:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877003284] [2022-01-31 23:42:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:26,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:26,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:26,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:26,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:26,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:26,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877003284] [2022-01-31 23:42:26,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877003284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:26,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:26,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:26,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034445532] [2022-01-31 23:42:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:26,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:26,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:26,171 INFO L87 Difference]: Start difference. First operand 832 states and 1197 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:27,874 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-01-31 23:42:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:27,874 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 23:42:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:27,878 INFO L225 Difference]: With dead ends: 1409 [2022-01-31 23:42:27,879 INFO L226 Difference]: Without dead ends: 993 [2022-01-31 23:42:27,880 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 23:42:27,880 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:27,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1232 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:42:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-31 23:42:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-01-31 23:42:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 570 states have (on average 1.3859649122807018) internal successors, (790), 573 states have internal predecessors, (790), 105 states have call successors, (105), 45 states have call predecessors, (105), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-01-31 23:42:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-01-31 23:42:27,979 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-01-31 23:42:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-01-31 23:42:27,980 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 23:42:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-01-31 23:42:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 23:42:27,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:27,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:27,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:42:27,982 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-01-31 23:42:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:27,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218448694] [2022-01-31 23:42:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:27,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:27,984 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:28,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218448694] [2022-01-31 23:42:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218448694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:28,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:28,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:42:28,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975473354] [2022-01-31 23:42:28,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:28,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:42:28,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:42:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:42:28,115 INFO L87 Difference]: Start difference. First operand 734 states and 1026 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:42:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:29,444 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-01-31 23:42:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:42:29,444 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 23:42:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:29,448 INFO L225 Difference]: With dead ends: 975 [2022-01-31 23:42:29,448 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 23:42:29,448 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 23:42:29,449 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:29,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 749 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:42:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 23:42:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-01-31 23:42:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3962585034013606) internal successors, (821), 600 states have internal predecessors, (821), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-01-31 23:42:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-01-31 23:42:29,535 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-01-31 23:42:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:29,536 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-01-31 23:42:29,536 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 23:42:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-01-31 23:42:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:42:29,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:29,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:29,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:42:29,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-01-31 23:42:29,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:29,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757066506] [2022-01-31 23:42:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:29,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:29,540 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:42:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:29,647 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 23:42:29,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757066506] [2022-01-31 23:42:29,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757066506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:29,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:29,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:29,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461936396] [2022-01-31 23:42:29,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:29,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:29,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:29,649 INFO L87 Difference]: Start difference. First operand 754 states and 1052 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:42:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:31,183 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-01-31 23:42:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:31,183 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 23:42:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:31,187 INFO L225 Difference]: With dead ends: 1159 [2022-01-31 23:42:31,187 INFO L226 Difference]: Without dead ends: 934 [2022-01-31 23:42:31,188 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 23:42:31,188 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 921 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:31,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1341 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:42:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-01-31 23:42:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-01-31 23:42:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3945578231292517) internal successors, (820), 600 states have internal predecessors, (820), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-01-31 23:42:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-01-31 23:42:31,289 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-01-31 23:42:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:31,289 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-01-31 23:42:31,289 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 23:42:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-01-31 23:42:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 23:42:31,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:31,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:42:31,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-01-31 23:42:31,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639499851] [2022-01-31 23:42:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:31,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 23:42:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:31,400 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 23:42:31,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639499851] [2022-01-31 23:42:31,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639499851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:31,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:31,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:31,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265503988] [2022-01-31 23:42:31,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:31,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:31,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:31,401 INFO L87 Difference]: Start difference. First operand 754 states and 1051 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:42:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:32,309 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-01-31 23:42:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:32,310 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 23:42:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:32,313 INFO L225 Difference]: With dead ends: 956 [2022-01-31 23:42:32,313 INFO L226 Difference]: Without dead ends: 889 [2022-01-31 23:42:32,314 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 23:42:32,314 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1894 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:32,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 1086 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:42:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-31 23:42:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-01-31 23:42:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 581 states have (on average 1.395869191049914) internal successors, (811), 593 states have internal predecessors, (811), 105 states have call successors, (105), 46 states have call predecessors, (105), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-01-31 23:42:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-01-31 23:42:32,408 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-01-31 23:42:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:32,408 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-01-31 23:42:32,408 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 23:42:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-01-31 23:42:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 23:42:32,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:32,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:32,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:42:32,410 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-01-31 23:42:32,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:32,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548174025] [2022-01-31 23:42:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:32,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:32,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:32,549 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 23:42:32,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:32,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548174025] [2022-01-31 23:42:32,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [548174025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:32,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:32,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:42:32,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69922204] [2022-01-31 23:42:32,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:32,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:42:32,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:42:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:42:32,551 INFO L87 Difference]: Start difference. First operand 743 states and 1038 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:42:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:34,848 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-01-31 23:42:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:42:34,849 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 23:42:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:34,852 INFO L225 Difference]: With dead ends: 1059 [2022-01-31 23:42:34,852 INFO L226 Difference]: Without dead ends: 998 [2022-01-31 23:42:34,853 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 23:42:34,858 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1803 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:34,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 1981 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:42:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-31 23:42:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-01-31 23:42:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 616 states have (on average 1.3944805194805194) internal successors, (859), 627 states have internal predecessors, (859), 109 states have call successors, (109), 49 states have call predecessors, (109), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-01-31 23:42:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-01-31 23:42:34,975 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-01-31 23:42:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:34,975 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-01-31 23:42:34,975 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 23:42:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-01-31 23:42:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:42:34,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:34,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:34,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:42:34,978 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-01-31 23:42:34,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:34,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842742040] [2022-01-31 23:42:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:34,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:34,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:35,127 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 23:42:35,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842742040] [2022-01-31 23:42:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842742040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:35,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:35,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:42:35,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592570857] [2022-01-31 23:42:35,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:35,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:42:35,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:42:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:42:35,129 INFO L87 Difference]: Start difference. First operand 786 states and 1099 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 23:42:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:36,759 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-01-31 23:42:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:42:36,759 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 23:42:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:36,763 INFO L225 Difference]: With dead ends: 1094 [2022-01-31 23:42:36,763 INFO L226 Difference]: Without dead ends: 1083 [2022-01-31 23:42:36,764 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 23:42:36,764 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1242 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:36,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 1386 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:42:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-31 23:42:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-01-31 23:42:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 672 states have (on average 1.3675595238095237) internal successors, (919), 678 states have internal predecessors, (919), 111 states have call successors, (111), 51 states have call predecessors, (111), 76 states have return successors, (154), 137 states have call predecessors, (154), 104 states have call successors, (154) [2022-01-31 23:42:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-01-31 23:42:36,899 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-01-31 23:42:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:36,900 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-01-31 23:42:36,900 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 23:42:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-01-31 23:42:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:42:36,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:36,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:36,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:42:36,902 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-01-31 23:42:36,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:36,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378277544] [2022-01-31 23:42:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:36,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:36,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:36,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:36,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:37,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378277544] [2022-01-31 23:42:37,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378277544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:37,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:37,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:37,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482954050] [2022-01-31 23:42:37,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:37,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:37,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:37,081 INFO L87 Difference]: Start difference. First operand 860 states and 1184 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:42:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:39,277 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-01-31 23:42:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:39,278 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 23:42:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:39,281 INFO L225 Difference]: With dead ends: 1020 [2022-01-31 23:42:39,281 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 23:42:39,282 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 23:42:39,282 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 2232 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:39,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 1785 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:42:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 23:42:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-01-31 23:42:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 653 states have (on average 1.3721286370597243) internal successors, (896), 666 states have internal predecessors, (896), 111 states have call successors, (111), 51 states have call predecessors, (111), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-01-31 23:42:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-01-31 23:42:39,431 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-01-31 23:42:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:39,432 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-01-31 23:42:39,432 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 23:42:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-01-31 23:42:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:42:39,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:39,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:42:39,434 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-01-31 23:42:39,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:39,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819453020] [2022-01-31 23:42:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:39,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:39,571 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 23:42:39,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819453020] [2022-01-31 23:42:39,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [819453020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:39,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:39,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:39,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297670922] [2022-01-31 23:42:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:39,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:39,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:39,573 INFO L87 Difference]: Start difference. First operand 837 states and 1150 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:42:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:41,311 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-01-31 23:42:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:42:41,311 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 23:42:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:41,315 INFO L225 Difference]: With dead ends: 982 [2022-01-31 23:42:41,315 INFO L226 Difference]: Without dead ends: 977 [2022-01-31 23:42:41,315 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 23:42:41,315 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 1534 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:41,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1435 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:42:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-31 23:42:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-01-31 23:42:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 668 states have (on average 1.3682634730538923) internal successors, (914), 682 states have internal predecessors, (914), 112 states have call successors, (112), 52 states have call predecessors, (112), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-01-31 23:42:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-01-31 23:42:41,448 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-01-31 23:42:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:41,448 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-01-31 23:42:41,448 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 23:42:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-01-31 23:42:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:42:41,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:41,468 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] [2022-01-31 23:42:41,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:42:41,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-01-31 23:42:41,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:41,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017505884] [2022-01-31 23:42:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:41,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:41,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:42:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:42:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:41,585 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 23:42:41,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017505884] [2022-01-31 23:42:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017505884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:41,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:41,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:42:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964330165] [2022-01-31 23:42:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:42:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:42:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:42:41,587 INFO L87 Difference]: Start difference. First operand 855 states and 1171 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 23:42:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:43,270 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-01-31 23:42:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:42:43,271 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 23:42:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:43,274 INFO L225 Difference]: With dead ends: 1188 [2022-01-31 23:42:43,274 INFO L226 Difference]: Without dead ends: 947 [2022-01-31 23:42:43,275 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 23:42:43,275 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1034 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1163 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:42:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-31 23:42:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-01-31 23:42:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 647 states have (on average 1.3663060278207109) internal successors, (884), 659 states have internal predecessors, (884), 110 states have call successors, (110), 51 states have call predecessors, (110), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-01-31 23:42:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-01-31 23:42:43,409 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-01-31 23:42:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-01-31 23:42:43,409 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 23:42:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-01-31 23:42:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 23:42:43,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:43,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:42:43,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:42:43,412 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-01-31 23:42:43,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:43,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414895623] [2022-01-31 23:42:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:43,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:43,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:43,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:43,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414895623] [2022-01-31 23:42:43,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414895623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:43,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:43,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:43,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975350274] [2022-01-31 23:42:43,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:43,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:43,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:43,539 INFO L87 Difference]: Start difference. First operand 827 states and 1134 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 23:42:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:45,988 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-01-31 23:42:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:42:45,989 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 23:42:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:45,992 INFO L225 Difference]: With dead ends: 962 [2022-01-31 23:42:45,992 INFO L226 Difference]: Without dead ends: 958 [2022-01-31 23:42:45,992 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 23:42:45,992 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 371 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 4881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:45,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2378 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:42:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-31 23:42:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-01-31 23:42:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 653 states have (on average 1.3644716692189893) internal successors, (891), 666 states have internal predecessors, (891), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-01-31 23:42:46,131 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-01-31 23:42:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-01-31 23:42:46,132 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 23:42:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-01-31 23:42:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 23:42:46,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:46,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:42:46,134 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-01-31 23:42:46,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108721298] [2022-01-31 23:42:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:46,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:46,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:46,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108721298] [2022-01-31 23:42:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108721298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:46,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:46,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:42:46,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597947269] [2022-01-31 23:42:46,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:42:46,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:42:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:42:46,304 INFO L87 Difference]: Start difference. First operand 834 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 23:42:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:48,466 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-01-31 23:42:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:48,466 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 23:42:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:48,470 INFO L225 Difference]: With dead ends: 977 [2022-01-31 23:42:48,470 INFO L226 Difference]: Without dead ends: 953 [2022-01-31 23:42:48,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 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 23:42:48,471 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 737 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3839 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 3839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:48,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2436 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 3839 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:42:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-01-31 23:42:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-01-31 23:42:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.3634969325153374) internal successors, (889), 665 states have internal predecessors, (889), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-01-31 23:42:48,615 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-01-31 23:42:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:48,615 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-01-31 23:42:48,616 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 23:42:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-01-31 23:42:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 23:42:48,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:48,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:48,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:42:48,618 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-01-31 23:42:48,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:48,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254237409] [2022-01-31 23:42:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:48,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:48,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:48,831 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 23:42:48,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:48,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254237409] [2022-01-31 23:42:48,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254237409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:48,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:48,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:42:48,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236875229] [2022-01-31 23:42:48,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:48,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:42:48,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:48,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:42:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:42:48,833 INFO L87 Difference]: Start difference. First operand 833 states and 1141 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:42:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:51,077 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-01-31 23:42:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:51,077 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 23:42:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:51,080 INFO L225 Difference]: With dead ends: 963 [2022-01-31 23:42:51,080 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 23:42:51,081 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 23:42:51,081 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1931 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:51,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1957 Valid, 1476 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:42:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 23:42:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-01-31 23:42:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.361963190184049) internal successors, (888), 665 states have internal predecessors, (888), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-01-31 23:42:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-01-31 23:42:51,262 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-01-31 23:42:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-01-31 23:42:51,262 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 23:42:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-01-31 23:42:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:42:51,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:51,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:51,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:42:51,264 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-01-31 23:42:51,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:51,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594143091] [2022-01-31 23:42:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:51,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:51,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:42:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:51,397 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 23:42:51,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:51,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594143091] [2022-01-31 23:42:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594143091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:51,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:51,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:42:51,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879668595] [2022-01-31 23:42:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:51,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:42:51,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:42:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:42:51,398 INFO L87 Difference]: Start difference. First operand 833 states and 1140 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 23:42:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:53,188 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-01-31 23:42:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:42:53,203 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 23:42:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:53,207 INFO L225 Difference]: With dead ends: 967 [2022-01-31 23:42:53,207 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 23:42:53,207 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 23:42:53,207 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 2284 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:53,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1257 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:42:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 23:42:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-01-31 23:42:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.370429252782194) internal successors, (862), 641 states have internal predecessors, (862), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-01-31 23:42:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-01-31 23:42:53,385 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-01-31 23:42:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:53,385 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-01-31 23:42:53,385 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 23:42:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-01-31 23:42:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:42:53,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:53,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:42:53,387 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-01-31 23:42:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958067283] [2022-01-31 23:42:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:53,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:53,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:42:53,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:53,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958067283] [2022-01-31 23:42:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958067283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:53,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:42:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624432209] [2022-01-31 23:42:53,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:42:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:42:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:42:53,614 INFO L87 Difference]: Start difference. First operand 805 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:42:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:55,715 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-01-31 23:42:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:42:55,715 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 23:42:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:55,718 INFO L225 Difference]: With dead ends: 933 [2022-01-31 23:42:55,718 INFO L226 Difference]: Without dead ends: 927 [2022-01-31 23:42:55,719 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 23:42:55,719 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2924 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:55,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 1295 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:42:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-01-31 23:42:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-01-31 23:42:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.368839427662957) internal successors, (861), 641 states have internal predecessors, (861), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-01-31 23:42:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-01-31 23:42:55,891 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-01-31 23:42:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:55,891 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-01-31 23:42:55,891 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 23:42:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-01-31 23:42:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 23:42:55,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:55,893 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, 1, 1] [2022-01-31 23:42:55,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:42:55,893 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-01-31 23:42:55,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:55,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534056867] [2022-01-31 23:42:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:55,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:55,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:42:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:56,084 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 23:42:56,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:56,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534056867] [2022-01-31 23:42:56,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534056867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:56,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:56,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:42:56,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146164194] [2022-01-31 23:42:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:56,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:42:56,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:42:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:42:56,085 INFO L87 Difference]: Start difference. First operand 805 states and 1107 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:42:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:42:58,478 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-01-31 23:42:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:42:58,478 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 23:42:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:42:58,481 INFO L225 Difference]: With dead ends: 956 [2022-01-31 23:42:58,481 INFO L226 Difference]: Without dead ends: 916 [2022-01-31 23:42:58,482 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 23:42:58,482 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 5125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:42:58,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2655 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:42:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-31 23:42:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-01-31 23:42:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 622 states have (on average 1.3520900321543408) internal successors, (841), 634 states have internal predecessors, (841), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-01-31 23:42:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-01-31 23:42:58,647 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-01-31 23:42:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:42:58,647 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-01-31 23:42:58,647 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 23:42:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-01-31 23:42:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:42:58,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:42:58,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:58,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:42:58,649 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:42:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:42:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-01-31 23:42:58,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:42:58,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621653558] [2022-01-31 23:42:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:42:58,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:42:58,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:42:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:42:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:42:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:42:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:42:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:42:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:42:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:42:58,863 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 23:42:58,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:42:58,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621653558] [2022-01-31 23:42:58,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621653558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:42:58,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:42:58,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:42:58,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260481408] [2022-01-31 23:42:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:42:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:42:58,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:42:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:42:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:42:58,865 INFO L87 Difference]: Start difference. First operand 796 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:43:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:01,445 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-01-31 23:43:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:43:01,445 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 23:43:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:01,448 INFO L225 Difference]: With dead ends: 932 [2022-01-31 23:43:01,448 INFO L226 Difference]: Without dead ends: 914 [2022-01-31 23:43:01,449 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 23:43:01,449 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 991 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:01,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2775 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:43:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-01-31 23:43:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-01-31 23:43:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 621 states have (on average 1.3510466988727858) internal successors, (839), 633 states have internal predecessors, (839), 105 states have call successors, (105), 49 states have call predecessors, (105), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-01-31 23:43:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-01-31 23:43:01,624 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 56 [2022-01-31 23:43:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:01,625 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-01-31 23:43:01,625 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 23:43:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-01-31 23:43:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 23:43:01,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:01,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:01,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:43:01,627 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-01-31 23:43:01,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:01,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860227977] [2022-01-31 23:43:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:01,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:01,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:43:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:01,803 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 23:43:01,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860227977] [2022-01-31 23:43:01,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860227977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:01,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:01,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:43:01,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534140361] [2022-01-31 23:43:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:01,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:43:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:43:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:43:01,805 INFO L87 Difference]: Start difference. First operand 794 states and 1079 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:43:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:04,067 INFO L93 Difference]: Finished difference Result 927 states and 1303 transitions. [2022-01-31 23:43:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:43:04,067 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 23:43:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:04,070 INFO L225 Difference]: With dead ends: 927 [2022-01-31 23:43:04,070 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 23:43:04,071 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 23:43:04,071 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 363 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:04,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2581 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:43:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 23:43:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-01-31 23:43:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3511326860841424) internal successors, (835), 630 states have internal predecessors, (835), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-01-31 23:43:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1072 transitions. [2022-01-31 23:43:04,262 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1072 transitions. Word has length 55 [2022-01-31 23:43:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:04,262 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1072 transitions. [2022-01-31 23:43:04,262 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 23:43:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1072 transitions. [2022-01-31 23:43:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:43:04,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:04,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:04,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:43:04,265 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-01-31 23:43:04,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343787787] [2022-01-31 23:43:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:04,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:04,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:04,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343787787] [2022-01-31 23:43:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [343787787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:04,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:04,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:43:04,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999064920] [2022-01-31 23:43:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:04,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:43:04,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:43:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:04,403 INFO L87 Difference]: Start difference. First operand 789 states and 1072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:43:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:06,462 INFO L93 Difference]: Finished difference Result 974 states and 1354 transitions. [2022-01-31 23:43:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:43:06,478 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 23:43:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:06,481 INFO L225 Difference]: With dead ends: 974 [2022-01-31 23:43:06,481 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 23:43:06,481 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 23:43:06,482 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1314 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:43:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 23:43:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 789. [2022-01-31 23:43:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3495145631067962) internal successors, (834), 630 states have internal predecessors, (834), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-01-31 23:43:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-01-31 23:43:06,654 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-01-31 23:43:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:06,654 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-01-31 23:43:06,654 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 23:43:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-01-31 23:43:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:43:06,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:06,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:06,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:43:06,656 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 1 times [2022-01-31 23:43:06,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:06,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665028694] [2022-01-31 23:43:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:06,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:06,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:43:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 23:43:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:06,799 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 23:43:06,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665028694] [2022-01-31 23:43:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [665028694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:06,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:43:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557233461] [2022-01-31 23:43:06,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:43:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:43:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:43:06,800 INFO L87 Difference]: Start difference. First operand 789 states and 1071 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:07,998 INFO L93 Difference]: Finished difference Result 1224 states and 1667 transitions. [2022-01-31 23:43:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:43:07,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 73 [2022-01-31 23:43:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:08,001 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 23:43:08,001 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 23:43:08,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:43:08,003 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 1764 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 797 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:43:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 23:43:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-01-31 23:43:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 609 states have (on average 1.341543513957307) internal successors, (817), 620 states have internal predecessors, (817), 103 states have call successors, (103), 49 states have call predecessors, (103), 65 states have return successors, (122), 115 states have call predecessors, (122), 97 states have call successors, (122) [2022-01-31 23:43:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1042 transitions. [2022-01-31 23:43:08,195 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1042 transitions. Word has length 73 [2022-01-31 23:43:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1042 transitions. [2022-01-31 23:43:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1042 transitions. [2022-01-31 23:43:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 23:43:08,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:08,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:08,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:43:08,197 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-01-31 23:43:08,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:08,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292751008] [2022-01-31 23:43:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:08,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:08,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 23:43:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:08,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292751008] [2022-01-31 23:43:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292751008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:08,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:43:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993267731] [2022-01-31 23:43:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:43:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:43:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:43:08,303 INFO L87 Difference]: Start difference. First operand 778 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:43:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:09,497 INFO L93 Difference]: Finished difference Result 911 states and 1202 transitions. [2022-01-31 23:43:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:43:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-01-31 23:43:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:09,500 INFO L225 Difference]: With dead ends: 911 [2022-01-31 23:43:09,500 INFO L226 Difference]: Without dead ends: 820 [2022-01-31 23:43:09,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:09,500 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1177 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:09,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1027 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:43:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-31 23:43:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 788. [2022-01-31 23:43:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 616 states have (on average 1.3327922077922079) internal successors, (821), 627 states have internal predecessors, (821), 103 states have call successors, (103), 51 states have call predecessors, (103), 68 states have return successors, (124), 116 states have call predecessors, (124), 98 states have call successors, (124) [2022-01-31 23:43:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1048 transitions. [2022-01-31 23:43:09,697 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1048 transitions. Word has length 61 [2022-01-31 23:43:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:09,697 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1048 transitions. [2022-01-31 23:43:09,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:43:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1048 transitions. [2022-01-31 23:43:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:43:09,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:09,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:09,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:43:09,699 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:09,699 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-01-31 23:43:09,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:09,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243555665] [2022-01-31 23:43:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:09,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:09,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 23:43:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:09,927 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 23:43:09,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243555665] [2022-01-31 23:43:09,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243555665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:09,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:09,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:09,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546191869] [2022-01-31 23:43:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:09,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:09,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:09,928 INFO L87 Difference]: Start difference. First operand 788 states and 1048 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:12,396 INFO L93 Difference]: Finished difference Result 814 states and 1076 transitions. [2022-01-31 23:43:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:12,396 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 23:43:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:12,398 INFO L225 Difference]: With dead ends: 814 [2022-01-31 23:43:12,398 INFO L226 Difference]: Without dead ends: 790 [2022-01-31 23:43:12,399 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 23:43:12,399 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 709 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 5602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:12,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 2390 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 5602 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-31 23:43:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-01-31 23:43:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 615 states have (on average 1.3317073170731708) internal successors, (819), 626 states have internal predecessors, (819), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-01-31 23:43:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1044 transitions. [2022-01-31 23:43:12,570 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1044 transitions. Word has length 62 [2022-01-31 23:43:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:12,571 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1044 transitions. [2022-01-31 23:43:12,571 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 23:43:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1044 transitions. [2022-01-31 23:43:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 23:43:12,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:12,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:12,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:43:12,572 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-01-31 23:43:12,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224558555] [2022-01-31 23:43:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:12,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:12,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:12,844 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 23:43:12,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224558555] [2022-01-31 23:43:12,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224558555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:12,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:12,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:12,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234815360] [2022-01-31 23:43:12,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:12,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:12,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:12,845 INFO L87 Difference]: Start difference. First operand 786 states and 1044 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:15,181 INFO L93 Difference]: Finished difference Result 812 states and 1072 transitions. [2022-01-31 23:43:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:15,181 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 23:43:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:15,189 INFO L225 Difference]: With dead ends: 812 [2022-01-31 23:43:15,189 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 23:43:15,190 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 23:43:15,190 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 717 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 5342 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2154 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5342 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:43:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 23:43:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2022-01-31 23:43:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 614 states have (on average 1.3159609120521172) internal successors, (808), 625 states have internal predecessors, (808), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-01-31 23:43:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1033 transitions. [2022-01-31 23:43:15,365 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1033 transitions. Word has length 59 [2022-01-31 23:43:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:15,365 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1033 transitions. [2022-01-31 23:43:15,365 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 23:43:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1033 transitions. [2022-01-31 23:43:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 23:43:15,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:15,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:15,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:43:15,367 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-01-31 23:43:15,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818951241] [2022-01-31 23:43:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:15,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:15,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:15,600 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 23:43:15,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818951241] [2022-01-31 23:43:15,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818951241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:15,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:15,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:15,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4080712] [2022-01-31 23:43:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:15,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:15,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:15,602 INFO L87 Difference]: Start difference. First operand 785 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-31 23:43:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:17,802 INFO L93 Difference]: Finished difference Result 802 states and 1051 transitions. [2022-01-31 23:43:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:43:17,802 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 23:43:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:17,804 INFO L225 Difference]: With dead ends: 802 [2022-01-31 23:43:17,804 INFO L226 Difference]: Without dead ends: 782 [2022-01-31 23:43:17,804 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 23:43:17,805 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 641 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:17,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2143 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:43:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-31 23:43:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2022-01-31 23:43:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 612 states have (on average 1.315359477124183) internal successors, (805), 623 states have internal predecessors, (805), 101 states have call successors, (101), 51 states have call predecessors, (101), 68 states have return successors, (122), 114 states have call predecessors, (122), 96 states have call successors, (122) [2022-01-31 23:43:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1028 transitions. [2022-01-31 23:43:17,979 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1028 transitions. Word has length 58 [2022-01-31 23:43:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:17,979 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1028 transitions. [2022-01-31 23:43:17,979 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 23:43:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1028 transitions. [2022-01-31 23:43:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 23:43:17,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:17,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:17,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:43:17,981 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-01-31 23:43:17,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:17,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321267446] [2022-01-31 23:43:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:17,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:17,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:18,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321267446] [2022-01-31 23:43:18,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [321267446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:18,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:18,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:18,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987479226] [2022-01-31 23:43:18,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:18,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:18,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:18,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:18,188 INFO L87 Difference]: Start difference. First operand 782 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:43:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:20,205 INFO L93 Difference]: Finished difference Result 835 states and 1083 transitions. [2022-01-31 23:43:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:20,206 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 23:43:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:20,208 INFO L225 Difference]: With dead ends: 835 [2022-01-31 23:43:20,208 INFO L226 Difference]: Without dead ends: 770 [2022-01-31 23:43:20,208 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 23:43:20,209 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 963 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 4086 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 4432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 4086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:20,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1937 Invalid, 4432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 4086 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:43:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-31 23:43:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2022-01-31 23:43:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 614 states have internal predecessors, (790), 98 states have call successors, (98), 51 states have call predecessors, (98), 68 states have return successors, (119), 111 states have call predecessors, (119), 93 states have call successors, (119) [2022-01-31 23:43:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1007 transitions. [2022-01-31 23:43:20,389 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1007 transitions. Word has length 59 [2022-01-31 23:43:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:20,389 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1007 transitions. [2022-01-31 23:43:20,390 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 23:43:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1007 transitions. [2022-01-31 23:43:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:20,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:20,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:20,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:43:20,391 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-01-31 23:43:20,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:20,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601876483] [2022-01-31 23:43:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:20,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:20,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:20,523 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 23:43:20,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:20,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601876483] [2022-01-31 23:43:20,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601876483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:20,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:20,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:43:20,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538440893] [2022-01-31 23:43:20,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:20,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:43:20,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:43:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:43:20,524 INFO L87 Difference]: Start difference. First operand 770 states and 1007 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:21,917 INFO L93 Difference]: Finished difference Result 913 states and 1205 transitions. [2022-01-31 23:43:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:43:21,917 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 23:43:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:21,919 INFO L225 Difference]: With dead ends: 913 [2022-01-31 23:43:21,919 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 23:43:21,920 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 23:43:21,920 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 972 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:21,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1181 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:43:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 23:43:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 777. [2022-01-31 23:43:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 608 states have (on average 1.3108552631578947) internal successors, (797), 620 states have internal predecessors, (797), 99 states have call successors, (99), 51 states have call predecessors, (99), 69 states have return successors, (126), 112 states have call predecessors, (126), 94 states have call successors, (126) [2022-01-31 23:43:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1022 transitions. [2022-01-31 23:43:22,098 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1022 transitions. Word has length 60 [2022-01-31 23:43:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1022 transitions. [2022-01-31 23:43:22,098 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 23:43:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1022 transitions. [2022-01-31 23:43:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:22,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:22,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:22,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:43:22,100 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-01-31 23:43:22,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:22,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128664995] [2022-01-31 23:43:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:22,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:22,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:43:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:22,305 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 23:43:22,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:22,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128664995] [2022-01-31 23:43:22,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128664995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:22,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:22,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:22,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623284091] [2022-01-31 23:43:22,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:22,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:22,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:22,307 INFO L87 Difference]: Start difference. First operand 777 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:24,086 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2022-01-31 23:43:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:43:24,086 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 23:43:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:24,088 INFO L225 Difference]: With dead ends: 799 [2022-01-31 23:43:24,088 INFO L226 Difference]: Without dead ends: 775 [2022-01-31 23:43:24,089 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 23:43:24,089 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 366 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:24,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1766 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:43:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-31 23:43:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-01-31 23:43:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 607 states have (on average 1.3097199341021417) internal successors, (795), 619 states have internal predecessors, (795), 98 states have call successors, (98), 51 states have call predecessors, (98), 69 states have return successors, (125), 111 states have call predecessors, (125), 93 states have call successors, (125) [2022-01-31 23:43:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1018 transitions. [2022-01-31 23:43:24,273 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1018 transitions. Word has length 60 [2022-01-31 23:43:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:24,273 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1018 transitions. [2022-01-31 23:43:24,273 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 23:43:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1018 transitions. [2022-01-31 23:43:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:43:24,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:24,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:24,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:43:24,275 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-01-31 23:43:24,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:24,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85304147] [2022-01-31 23:43:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:24,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:24,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:24,487 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 23:43:24,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85304147] [2022-01-31 23:43:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [85304147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:24,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:24,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:24,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148491782] [2022-01-31 23:43:24,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:24,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:24,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:24,489 INFO L87 Difference]: Start difference. First operand 775 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 23:43:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:26,412 INFO L93 Difference]: Finished difference Result 837 states and 1087 transitions. [2022-01-31 23:43:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:26,412 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 23:43:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:26,414 INFO L225 Difference]: With dead ends: 837 [2022-01-31 23:43:26,414 INFO L226 Difference]: Without dead ends: 767 [2022-01-31 23:43:26,415 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 23:43:26,415 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 659 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1766 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:43:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-01-31 23:43:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-01-31 23:43:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 601 states have (on average 1.302828618968386) internal successors, (783), 613 states have internal predecessors, (783), 96 states have call successors, (96), 51 states have call predecessors, (96), 69 states have return successors, (123), 109 states have call predecessors, (123), 91 states have call successors, (123) [2022-01-31 23:43:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1002 transitions. [2022-01-31 23:43:26,595 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1002 transitions. Word has length 60 [2022-01-31 23:43:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:26,595 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1002 transitions. [2022-01-31 23:43:26,595 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 23:43:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1002 transitions. [2022-01-31 23:43:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 23:43:26,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:26,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:26,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:43:26,597 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:26,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-01-31 23:43:26,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258421772] [2022-01-31 23:43:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:26,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:26,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:26,737 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 23:43:26,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258421772] [2022-01-31 23:43:26,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258421772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:26,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:26,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:26,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988169611] [2022-01-31 23:43:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:26,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:26,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:26,738 INFO L87 Difference]: Start difference. First operand 767 states and 1002 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:28,144 INFO L93 Difference]: Finished difference Result 813 states and 1068 transitions. [2022-01-31 23:43:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:43:28,144 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 23:43:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:28,146 INFO L225 Difference]: With dead ends: 813 [2022-01-31 23:43:28,146 INFO L226 Difference]: Without dead ends: 779 [2022-01-31 23:43:28,147 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 23:43:28,147 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 636 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:28,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 1123 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:43:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-31 23:43:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 771. [2022-01-31 23:43:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 603 states have (on average 1.3018242122719734) internal successors, (785), 617 states have internal predecessors, (785), 96 states have call successors, (96), 51 states have call predecessors, (96), 71 states have return successors, (139), 109 states have call predecessors, (139), 91 states have call successors, (139) [2022-01-31 23:43:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1020 transitions. [2022-01-31 23:43:28,322 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1020 transitions. Word has length 61 [2022-01-31 23:43:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:28,322 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1020 transitions. [2022-01-31 23:43:28,323 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 23:43:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1020 transitions. [2022-01-31 23:43:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:28,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:28,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:43:28,324 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-01-31 23:43:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356085287] [2022-01-31 23:43:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:28,326 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:28,613 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 23:43:28,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:28,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356085287] [2022-01-31 23:43:28,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356085287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:28,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:28,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:28,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205385437] [2022-01-31 23:43:28,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:28,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:28,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:28,614 INFO L87 Difference]: Start difference. First operand 771 states and 1020 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:43:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:30,963 INFO L93 Difference]: Finished difference Result 788 states and 1038 transitions. [2022-01-31 23:43:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:30,963 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 23:43:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:30,965 INFO L225 Difference]: With dead ends: 788 [2022-01-31 23:43:30,965 INFO L226 Difference]: Without dead ends: 766 [2022-01-31 23:43:30,966 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 23:43:30,966 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 883 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 5376 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 5686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 5376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:30,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 2405 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 5376 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:43:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-31 23:43:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-01-31 23:43:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 600 states have (on average 1.3016666666666667) internal successors, (781), 614 states have internal predecessors, (781), 95 states have call successors, (95), 51 states have call predecessors, (95), 70 states have return successors, (137), 107 states have call predecessors, (137), 90 states have call successors, (137) [2022-01-31 23:43:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1013 transitions. [2022-01-31 23:43:31,148 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1013 transitions. Word has length 63 [2022-01-31 23:43:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1013 transitions. [2022-01-31 23:43:31,148 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 23:43:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1013 transitions. [2022-01-31 23:43:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:43:31,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:31,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:31,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:43:31,149 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-01-31 23:43:31,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:31,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981552569] [2022-01-31 23:43:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:31,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:31,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:31,375 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 23:43:31,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981552569] [2022-01-31 23:43:31,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [981552569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:31,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:31,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:31,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434995587] [2022-01-31 23:43:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:31,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:31,377 INFO L87 Difference]: Start difference. First operand 766 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:43:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:33,371 INFO L93 Difference]: Finished difference Result 783 states and 1031 transitions. [2022-01-31 23:43:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:33,371 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 23:43:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:33,379 INFO L225 Difference]: With dead ends: 783 [2022-01-31 23:43:33,379 INFO L226 Difference]: Without dead ends: 761 [2022-01-31 23:43:33,379 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 23:43:33,379 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 591 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 5407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:33,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 2230 Invalid, 5407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:43:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-31 23:43:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-01-31 23:43:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 597 states have (on average 1.3015075376884422) internal successors, (777), 611 states have internal predecessors, (777), 94 states have call successors, (94), 51 states have call predecessors, (94), 69 states have return successors, (135), 105 states have call predecessors, (135), 89 states have call successors, (135) [2022-01-31 23:43:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1006 transitions. [2022-01-31 23:43:33,559 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1006 transitions. Word has length 62 [2022-01-31 23:43:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:33,559 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1006 transitions. [2022-01-31 23:43:33,559 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 23:43:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1006 transitions. [2022-01-31 23:43:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:43:33,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:33,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:33,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:43:33,560 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-01-31 23:43:33,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:33,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094734747] [2022-01-31 23:43:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:33,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:33,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:33,839 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094734747] [2022-01-31 23:43:33,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094734747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:33,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:33,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:43:33,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136777639] [2022-01-31 23:43:33,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:33,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:43:33,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:43:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:43:33,840 INFO L87 Difference]: Start difference. First operand 761 states and 1006 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 23:43:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:36,082 INFO L93 Difference]: Finished difference Result 785 states and 1031 transitions. [2022-01-31 23:43:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:43:36,082 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 23:43:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:36,085 INFO L225 Difference]: With dead ends: 785 [2022-01-31 23:43:36,085 INFO L226 Difference]: Without dead ends: 761 [2022-01-31 23:43:36,085 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 23:43:36,086 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 1780 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:36,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2244 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:43:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-31 23:43:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 759. [2022-01-31 23:43:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 596 states have (on average 1.3003355704697988) internal successors, (775), 610 states have internal predecessors, (775), 93 states have call successors, (93), 51 states have call predecessors, (93), 69 states have return successors, (134), 104 states have call predecessors, (134), 88 states have call successors, (134) [2022-01-31 23:43:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1002 transitions. [2022-01-31 23:43:36,269 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1002 transitions. Word has length 67 [2022-01-31 23:43:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:36,269 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1002 transitions. [2022-01-31 23:43:36,269 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 23:43:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1002 transitions. [2022-01-31 23:43:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:36,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:36,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:36,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:43:36,270 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-01-31 23:43:36,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:36,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654209836] [2022-01-31 23:43:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:36,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:36,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:43:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:36,542 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 23:43:36,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654209836] [2022-01-31 23:43:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [654209836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:36,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:36,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:43:36,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986823616] [2022-01-31 23:43:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:36,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:43:36,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:43:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:43:36,545 INFO L87 Difference]: Start difference. First operand 759 states and 1002 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:38,819 INFO L93 Difference]: Finished difference Result 781 states and 1025 transitions. [2022-01-31 23:43:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:43:38,819 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 23:43:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:38,821 INFO L225 Difference]: With dead ends: 781 [2022-01-31 23:43:38,821 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 23:43:38,821 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 23:43:38,822 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 1456 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2141 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:43:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 23:43:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2022-01-31 23:43:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 595 states have (on average 1.2991596638655463) internal successors, (773), 609 states have internal predecessors, (773), 92 states have call successors, (92), 51 states have call predecessors, (92), 69 states have return successors, (133), 103 states have call predecessors, (133), 87 states have call successors, (133) [2022-01-31 23:43:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 998 transitions. [2022-01-31 23:43:38,991 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 998 transitions. Word has length 63 [2022-01-31 23:43:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:38,992 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 998 transitions. [2022-01-31 23:43:38,992 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 23:43:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 998 transitions. [2022-01-31 23:43:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:43:38,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:38,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:43:38,993 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-01-31 23:43:38,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113620840] [2022-01-31 23:43:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:38,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:38,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:43:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:39,128 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 23:43:39,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:39,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113620840] [2022-01-31 23:43:39,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113620840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:39,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:39,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:43:39,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420463852] [2022-01-31 23:43:39,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:39,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:43:39,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:43:39,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:39,129 INFO L87 Difference]: Start difference. First operand 757 states and 998 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:40,082 INFO L93 Difference]: Finished difference Result 1021 states and 1347 transitions. [2022-01-31 23:43:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:43:40,082 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 23:43:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:40,084 INFO L225 Difference]: With dead ends: 1021 [2022-01-31 23:43:40,084 INFO L226 Difference]: Without dead ends: 702 [2022-01-31 23:43:40,085 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 23:43:40,086 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 1149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:40,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 863 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:43:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-31 23:43:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2022-01-31 23:43:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.2925925925925925) internal successors, (698), 552 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-01-31 23:43:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 882 transitions. [2022-01-31 23:43:40,249 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 882 transitions. Word has length 63 [2022-01-31 23:43:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 882 transitions. [2022-01-31 23:43:40,249 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 23:43:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 882 transitions. [2022-01-31 23:43:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:40,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:40,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:43:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:43:40,251 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-01-31 23:43:40,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153683445] [2022-01-31 23:43:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:40,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:43:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:43:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:40,375 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 23:43:40,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153683445] [2022-01-31 23:43:40,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153683445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:40,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:40,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:43:40,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499975018] [2022-01-31 23:43:40,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:43:40,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:43:40,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:43:40,376 INFO L87 Difference]: Start difference. First operand 685 states and 882 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 23:43:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:41,425 INFO L93 Difference]: Finished difference Result 805 states and 1038 transitions. [2022-01-31 23:43:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:43:41,425 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 23:43:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:41,427 INFO L225 Difference]: With dead ends: 805 [2022-01-31 23:43:41,427 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 23:43:41,427 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 23:43:41,427 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 338 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:41,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 849 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:43:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 23:43:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-01-31 23:43:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.288888888888889) internal successors, (696), 552 states have internal predecessors, (696), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-01-31 23:43:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-01-31 23:43:41,582 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 66 [2022-01-31 23:43:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-01-31 23:43:41,582 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 23:43:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-01-31 23:43:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:41,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:41,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 23:43:41,583 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-01-31 23:43:41,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736179817] [2022-01-31 23:43:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:41,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:41,838 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 23:43:41,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:41,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736179817] [2022-01-31 23:43:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736179817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:41,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:41,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:43:41,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992705641] [2022-01-31 23:43:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:41,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:43:41,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:43:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:43:41,839 INFO L87 Difference]: Start difference. First operand 685 states and 880 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 23:43:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:43,935 INFO L93 Difference]: Finished difference Result 707 states and 903 transitions. [2022-01-31 23:43:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:43:43,935 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 23:43:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:43,937 INFO L225 Difference]: With dead ends: 707 [2022-01-31 23:43:43,937 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 23:43:43,937 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 23:43:43,937 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1194 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 5233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:43,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 2046 Invalid, 5233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:43:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 23:43:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-01-31 23:43:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 539 states have (on average 1.287569573283859) internal successors, (694), 551 states have internal predecessors, (694), 81 states have call successors, (81), 47 states have call predecessors, (81), 62 states have return successors, (101), 91 states have call predecessors, (101), 76 states have call successors, (101) [2022-01-31 23:43:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 876 transitions. [2022-01-31 23:43:44,091 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 876 transitions. Word has length 66 [2022-01-31 23:43:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:44,091 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 876 transitions. [2022-01-31 23:43:44,091 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 23:43:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 876 transitions. [2022-01-31 23:43:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 23:43:44,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:44,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 23:43:44,092 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-01-31 23:43:44,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930308398] [2022-01-31 23:43:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:44,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:44,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:43:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:43:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:44,276 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 23:43:44,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:44,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930308398] [2022-01-31 23:43:44,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [930308398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:44,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:44,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:44,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055113412] [2022-01-31 23:43:44,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:44,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:44,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:44,277 INFO L87 Difference]: Start difference. First operand 683 states and 876 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 23:43:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:45,509 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2022-01-31 23:43:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:43:45,510 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 23:43:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:45,511 INFO L225 Difference]: With dead ends: 747 [2022-01-31 23:43:45,511 INFO L226 Difference]: Without dead ends: 714 [2022-01-31 23:43:45,512 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 23:43:45,512 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:45,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 863 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:43:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-31 23:43:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-01-31 23:43:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.286764705882353) internal successors, (700), 556 states have internal predecessors, (700), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-01-31 23:43:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 884 transitions. [2022-01-31 23:43:45,670 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 884 transitions. Word has length 65 [2022-01-31 23:43:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:45,671 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 884 transitions. [2022-01-31 23:43:45,671 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 23:43:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 884 transitions. [2022-01-31 23:43:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:45,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:45,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 23:43:45,672 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-01-31 23:43:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:45,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016057214] [2022-01-31 23:43:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:45,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:45,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:45,785 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 5 [2022-01-31 23:43:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:43:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:45,829 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 23:43:45,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:45,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016057214] [2022-01-31 23:43:45,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016057214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:45,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:45,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:45,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885975323] [2022-01-31 23:43:45,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:45,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:45,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:45,830 INFO L87 Difference]: Start difference. First operand 689 states and 884 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:46,946 INFO L93 Difference]: Finished difference Result 745 states and 945 transitions. [2022-01-31 23:43:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:43:46,947 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 23:43:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:46,949 INFO L225 Difference]: With dead ends: 745 [2022-01-31 23:43:46,949 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 23:43:46,949 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 23:43:46,949 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 615 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:46,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 997 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:43:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 23:43:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-01-31 23:43:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.2830882352941178) internal successors, (698), 556 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-01-31 23:43:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 882 transitions. [2022-01-31 23:43:47,115 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 882 transitions. Word has length 66 [2022-01-31 23:43:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:47,115 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 882 transitions. [2022-01-31 23:43:47,115 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 23:43:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 882 transitions. [2022-01-31 23:43:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:43:47,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:47,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:47,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 23:43:47,117 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-01-31 23:43:47,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660937076] [2022-01-31 23:43:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:47,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:47,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:43:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:47,297 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 23:43:47,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660937076] [2022-01-31 23:43:47,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [660937076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:47,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:47,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:43:47,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501818665] [2022-01-31 23:43:47,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:47,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:43:47,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:43:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:43:47,298 INFO L87 Difference]: Start difference. First operand 689 states and 882 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:49,086 INFO L93 Difference]: Finished difference Result 716 states and 912 transitions. [2022-01-31 23:43:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:43:49,086 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 23:43:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:49,088 INFO L225 Difference]: With dead ends: 716 [2022-01-31 23:43:49,088 INFO L226 Difference]: Without dead ends: 658 [2022-01-31 23:43:49,088 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 23:43:49,089 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 361 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:49,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1642 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:43:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-31 23:43:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2022-01-31 23:43:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 514 states have (on average 1.2684824902723735) internal successors, (652), 526 states have internal predecessors, (652), 75 states have call successors, (75), 47 states have call predecessors, (75), 62 states have return successors, (94), 85 states have call predecessors, (94), 70 states have call successors, (94) [2022-01-31 23:43:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-01-31 23:43:49,237 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 66 [2022-01-31 23:43:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:49,237 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-01-31 23:43:49,237 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 23:43:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-01-31 23:43:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:43:49,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:49,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 23:43:49,238 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-01-31 23:43:49,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049313587] [2022-01-31 23:43:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:49,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:49,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 23:43:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:49,392 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 23:43:49,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049313587] [2022-01-31 23:43:49,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049313587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:49,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:49,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:49,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992716257] [2022-01-31 23:43:49,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:49,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:49,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:49,394 INFO L87 Difference]: Start difference. First operand 652 states and 821 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:50,422 INFO L93 Difference]: Finished difference Result 686 states and 856 transitions. [2022-01-31 23:43:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:43:50,422 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 23:43:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:50,424 INFO L225 Difference]: With dead ends: 686 [2022-01-31 23:43:50,424 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 23:43:50,424 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 23:43:50,425 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 510 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:50,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1027 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:43:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 23:43:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-01-31 23:43:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 510 states have (on average 1.268627450980392) internal successors, (647), 522 states have internal predecessors, (647), 74 states have call successors, (74), 47 states have call predecessors, (74), 62 states have return successors, (93), 84 states have call predecessors, (93), 69 states have call successors, (93) [2022-01-31 23:43:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 814 transitions. [2022-01-31 23:43:50,562 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 814 transitions. Word has length 67 [2022-01-31 23:43:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:50,562 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 814 transitions. [2022-01-31 23:43:50,562 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 23:43:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 814 transitions. [2022-01-31 23:43:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:43:50,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:50,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 23:43:50,563 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-01-31 23:43:50,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765468197] [2022-01-31 23:43:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:50,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:50,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:50,713 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 23:43:50,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765468197] [2022-01-31 23:43:50,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765468197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:50,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:50,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:43:50,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430333099] [2022-01-31 23:43:50,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:50,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:43:50,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:43:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:43:50,715 INFO L87 Difference]: Start difference. First operand 647 states and 814 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:43:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:51,861 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2022-01-31 23:43:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:43:51,862 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 23:43:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:51,864 INFO L225 Difference]: With dead ends: 771 [2022-01-31 23:43:51,864 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 23:43:51,864 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 23:43:51,864 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 907 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:51,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 925 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:43:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 23:43:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 689. [2022-01-31 23:43:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2619926199261993) internal successors, (684), 556 states have internal predecessors, (684), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-01-31 23:43:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 861 transitions. [2022-01-31 23:43:52,025 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 861 transitions. Word has length 67 [2022-01-31 23:43:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:52,025 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 861 transitions. [2022-01-31 23:43:52,026 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 23:43:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 861 transitions. [2022-01-31 23:43:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 23:43:52,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:52,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:52,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 23:43:52,027 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-01-31 23:43:52,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:52,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966186692] [2022-01-31 23:43:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:52,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:52,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:43:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:52,191 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 23:43:52,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966186692] [2022-01-31 23:43:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966186692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:52,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:43:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208559212] [2022-01-31 23:43:52,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:52,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:43:52,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:43:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:43:52,193 INFO L87 Difference]: Start difference. First operand 689 states and 861 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:43:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:53,473 INFO L93 Difference]: Finished difference Result 767 states and 959 transitions. [2022-01-31 23:43:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:43:53,473 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 23:43:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:53,475 INFO L225 Difference]: With dead ends: 767 [2022-01-31 23:43:53,475 INFO L226 Difference]: Without dead ends: 761 [2022-01-31 23:43:53,475 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 23:43:53,476 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:53,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 821 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:43:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-31 23:43:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 689. [2022-01-31 23:43:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2601476014760147) internal successors, (683), 556 states have internal predecessors, (683), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-01-31 23:43:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 860 transitions. [2022-01-31 23:43:53,641 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 860 transitions. Word has length 68 [2022-01-31 23:43:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:53,641 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 860 transitions. [2022-01-31 23:43:53,641 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 23:43:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 860 transitions. [2022-01-31 23:43:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:43:53,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:53,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:53,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 23:43:53,642 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-01-31 23:43:53,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:53,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39674651] [2022-01-31 23:43:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:53,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:53,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:43:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:43:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:53,897 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 23:43:53,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39674651] [2022-01-31 23:43:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [39674651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:53,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:53,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:43:53,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611128982] [2022-01-31 23:43:53,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:53,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:43:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:43:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:43:53,898 INFO L87 Difference]: Start difference. First operand 689 states and 860 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 23:43:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:55,907 INFO L93 Difference]: Finished difference Result 722 states and 899 transitions. [2022-01-31 23:43:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:43:55,907 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 23:43:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:55,909 INFO L225 Difference]: With dead ends: 722 [2022-01-31 23:43:55,909 INFO L226 Difference]: Without dead ends: 698 [2022-01-31 23:43:55,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:43:55,910 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 311 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:55,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2212 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:43:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-31 23:43:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 687. [2022-01-31 23:43:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 541 states have (on average 1.2587800369685767) internal successors, (681), 555 states have internal predecessors, (681), 75 states have call successors, (75), 49 states have call predecessors, (75), 70 states have return successors, (100), 91 states have call predecessors, (100), 70 states have call successors, (100) [2022-01-31 23:43:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2022-01-31 23:43:56,074 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 74 [2022-01-31 23:43:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:56,074 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2022-01-31 23:43:56,074 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 23:43:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2022-01-31 23:43:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 23:43:56,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:56,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:56,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 23:43:56,075 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-01-31 23:43:56,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068271961] [2022-01-31 23:43:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:56,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:56,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:43:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:43:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 23:43:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:43:56,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068271961] [2022-01-31 23:43:56,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068271961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:56,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:56,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:43:56,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827763827] [2022-01-31 23:43:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:56,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:43:56,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:43:56,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:43:56,346 INFO L87 Difference]: Start difference. First operand 687 states and 856 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 23:43:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:43:58,361 INFO L93 Difference]: Finished difference Result 711 states and 882 transitions. [2022-01-31 23:43:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:43:58,361 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 23:43:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:43:58,363 INFO L225 Difference]: With dead ends: 711 [2022-01-31 23:43:58,363 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 23:43:58,364 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 23:43:58,364 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 789 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:43:58,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2269 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4575 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:43:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 23:43:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-01-31 23:43:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 539 states have (on average 1.2578849721706864) internal successors, (678), 553 states have internal predecessors, (678), 74 states have call successors, (74), 49 states have call predecessors, (74), 70 states have return successors, (99), 90 states have call predecessors, (99), 69 states have call successors, (99) [2022-01-31 23:43:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 851 transitions. [2022-01-31 23:43:58,532 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 851 transitions. Word has length 70 [2022-01-31 23:43:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:43:58,532 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 851 transitions. [2022-01-31 23:43:58,533 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 23:43:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 851 transitions. [2022-01-31 23:43:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 23:43:58,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:43:58,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:58,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 23:43:58,534 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:43:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:43:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-01-31 23:43:58,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:43:58,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547592666] [2022-01-31 23:43:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:43:58,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:43:58,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:43:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:43:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:43:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:43:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:43:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:43:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:43:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:43:58,796 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 23:43:58,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:43:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547592666] [2022-01-31 23:43:58,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [547592666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:43:58,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:43:58,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:43:58,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442059134] [2022-01-31 23:43:58,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:43:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:43:58,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:43:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:43:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:43:58,797 INFO L87 Difference]: Start difference. First operand 684 states and 851 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:44:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:00,535 INFO L93 Difference]: Finished difference Result 704 states and 872 transitions. [2022-01-31 23:44:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:00,535 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 23:44:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:00,537 INFO L225 Difference]: With dead ends: 704 [2022-01-31 23:44:00,537 INFO L226 Difference]: Without dead ends: 682 [2022-01-31 23:44:00,537 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 23:44:00,538 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 465 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:00,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 2031 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:44:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-31 23:44:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-01-31 23:44:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 538 states have (on average 1.2565055762081785) internal successors, (676), 552 states have internal predecessors, (676), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (98), 89 states have call predecessors, (98), 68 states have call successors, (98) [2022-01-31 23:44:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 847 transitions. [2022-01-31 23:44:00,702 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 847 transitions. Word has length 72 [2022-01-31 23:44:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:00,702 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 847 transitions. [2022-01-31 23:44:00,702 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 23:44:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 847 transitions. [2022-01-31 23:44:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:00,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:00,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 23:44:00,703 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-01-31 23:44:00,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:00,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114081337] [2022-01-31 23:44:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:00,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:00,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:00,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114081337] [2022-01-31 23:44:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114081337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:00,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:00,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:44:00,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824786416] [2022-01-31 23:44:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:00,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:44:00,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:44:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:00,971 INFO L87 Difference]: Start difference. First operand 682 states and 847 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:44:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:02,792 INFO L93 Difference]: Finished difference Result 699 states and 865 transitions. [2022-01-31 23:44:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:02,792 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 23:44:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:02,794 INFO L225 Difference]: With dead ends: 699 [2022-01-31 23:44:02,794 INFO L226 Difference]: Without dead ends: 670 [2022-01-31 23:44:02,795 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 23:44:02,795 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 689 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 4417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 2003 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:44:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-31 23:44:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-01-31 23:44:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 529 states have (on average 1.2570888468809074) internal successors, (665), 543 states have internal predecessors, (665), 71 states have call successors, (71), 49 states have call predecessors, (71), 69 states have return successors, (95), 86 states have call predecessors, (95), 66 states have call successors, (95) [2022-01-31 23:44:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 831 transitions. [2022-01-31 23:44:02,953 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 831 transitions. Word has length 69 [2022-01-31 23:44:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:02,954 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 831 transitions. [2022-01-31 23:44:02,954 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 23:44:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 831 transitions. [2022-01-31 23:44:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:02,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:02,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:02,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 23:44:02,955 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-01-31 23:44:02,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131329754] [2022-01-31 23:44:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:02,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:02,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 23:44:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:03,112 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 23:44:03,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:03,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131329754] [2022-01-31 23:44:03,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [131329754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:03,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:03,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:03,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377775204] [2022-01-31 23:44:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:03,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:03,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:03,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:03,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:03,114 INFO L87 Difference]: Start difference. First operand 670 states and 831 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:44:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:04,278 INFO L93 Difference]: Finished difference Result 704 states and 866 transitions. [2022-01-31 23:44:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:04,278 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 23:44:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:04,279 INFO L225 Difference]: With dead ends: 704 [2022-01-31 23:44:04,279 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 23:44:04,280 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 23:44:04,280 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 703 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:04,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 981 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 23:44:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-01-31 23:44:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 525 states have (on average 1.2571428571428571) internal successors, (660), 539 states have internal predecessors, (660), 70 states have call successors, (70), 49 states have call predecessors, (70), 69 states have return successors, (94), 85 states have call predecessors, (94), 65 states have call successors, (94) [2022-01-31 23:44:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 824 transitions. [2022-01-31 23:44:04,430 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 824 transitions. Word has length 69 [2022-01-31 23:44:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 824 transitions. [2022-01-31 23:44:04,431 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 23:44:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 824 transitions. [2022-01-31 23:44:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:04,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:04,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 23:44:04,432 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-01-31 23:44:04,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:04,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801438494] [2022-01-31 23:44:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:04,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:04,434 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-31 23:44:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:04,645 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:04,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801438494] [2022-01-31 23:44:04,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801438494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:04,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:04,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:04,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023067835] [2022-01-31 23:44:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:04,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:04,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:04,646 INFO L87 Difference]: Start difference. First operand 665 states and 824 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:44:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:06,356 INFO L93 Difference]: Finished difference Result 692 states and 854 transitions. [2022-01-31 23:44:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:44:06,356 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 23:44:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:06,358 INFO L225 Difference]: With dead ends: 692 [2022-01-31 23:44:06,358 INFO L226 Difference]: Without dead ends: 662 [2022-01-31 23:44:06,358 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 23:44:06,358 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 260 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:06,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1933 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:44:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-31 23:44:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-01-31 23:44:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 523 states have (on average 1.2562141491395793) internal successors, (657), 537 states have internal predecessors, (657), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-01-31 23:44:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 819 transitions. [2022-01-31 23:44:06,511 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 819 transitions. Word has length 69 [2022-01-31 23:44:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:06,511 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 819 transitions. [2022-01-31 23:44:06,511 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 23:44:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 819 transitions. [2022-01-31 23:44:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:06,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:06,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:06,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 23:44:06,512 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-01-31 23:44:06,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:06,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775493131] [2022-01-31 23:44:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:06,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:06,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:06,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775493131] [2022-01-31 23:44:06,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775493131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:06,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:06,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:06,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345776517] [2022-01-31 23:44:06,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:06,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:06,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:06,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:06,746 INFO L87 Difference]: Start difference. First operand 662 states and 819 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 23:44:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:08,274 INFO L93 Difference]: Finished difference Result 672 states and 828 transitions. [2022-01-31 23:44:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:44:08,274 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 23:44:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:08,276 INFO L225 Difference]: With dead ends: 672 [2022-01-31 23:44:08,276 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 23:44:08,276 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 23:44:08,277 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 748 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 3700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:08,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1544 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:44:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 23:44:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 660. [2022-01-31 23:44:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 521 states have (on average 1.2533589251439539) internal successors, (653), 535 states have internal predecessors, (653), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-01-31 23:44:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 815 transitions. [2022-01-31 23:44:08,433 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 815 transitions. Word has length 69 [2022-01-31 23:44:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:08,433 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 815 transitions. [2022-01-31 23:44:08,433 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 23:44:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 815 transitions. [2022-01-31 23:44:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 23:44:08,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:08,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 23:44:08,435 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-01-31 23:44:08,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:08,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943240669] [2022-01-31 23:44:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:08,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:08,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:08,597 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 23:44:08,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:08,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943240669] [2022-01-31 23:44:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943240669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:08,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:08,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:08,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534319930] [2022-01-31 23:44:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:08,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:08,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:08,600 INFO L87 Difference]: Start difference. First operand 660 states and 815 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:44:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:09,956 INFO L93 Difference]: Finished difference Result 736 states and 910 transitions. [2022-01-31 23:44:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:44:09,956 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 23:44:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:09,958 INFO L225 Difference]: With dead ends: 736 [2022-01-31 23:44:09,958 INFO L226 Difference]: Without dead ends: 674 [2022-01-31 23:44:09,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:44:09,959 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 901 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:09,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 840 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:44:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-31 23:44:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 604. [2022-01-31 23:44:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 475 states have (on average 1.2463157894736843) internal successors, (592), 487 states have internal predecessors, (592), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-01-31 23:44:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 744 transitions. [2022-01-31 23:44:10,105 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 744 transitions. Word has length 69 [2022-01-31 23:44:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:10,105 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 744 transitions. [2022-01-31 23:44:10,105 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 23:44:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 744 transitions. [2022-01-31 23:44:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:10,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:10,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:10,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 23:44:10,106 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:10,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-01-31 23:44:10,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:10,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002488245] [2022-01-31 23:44:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:10,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:10,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:10,362 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 23:44:10,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002488245] [2022-01-31 23:44:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002488245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:10,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:10,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:44:10,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699467393] [2022-01-31 23:44:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:10,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:44:10,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:44:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:44:10,363 INFO L87 Difference]: Start difference. First operand 604 states and 744 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 23:44:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:12,115 INFO L93 Difference]: Finished difference Result 637 states and 783 transitions. [2022-01-31 23:44:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:44:12,116 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 23:44:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:12,117 INFO L225 Difference]: With dead ends: 637 [2022-01-31 23:44:12,117 INFO L226 Difference]: Without dead ends: 610 [2022-01-31 23:44:12,117 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 23:44:12,118 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1108 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 4000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:12,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2200 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:44:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-31 23:44:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-01-31 23:44:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 477 states have (on average 1.2389937106918238) internal successors, (591), 489 states have internal predecessors, (591), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-01-31 23:44:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 743 transitions. [2022-01-31 23:44:12,257 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 743 transitions. Word has length 71 [2022-01-31 23:44:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:12,257 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 743 transitions. [2022-01-31 23:44:12,257 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 23:44:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 743 transitions. [2022-01-31 23:44:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:12,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:12,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:12,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 23:44:12,258 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-01-31 23:44:12,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398567726] [2022-01-31 23:44:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:12,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:12,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:12,418 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 23:44:12,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:12,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398567726] [2022-01-31 23:44:12,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398567726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:12,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:12,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:12,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77882644] [2022-01-31 23:44:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:12,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:12,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:12,419 INFO L87 Difference]: Start difference. First operand 606 states and 743 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:13,534 INFO L93 Difference]: Finished difference Result 644 states and 782 transitions. [2022-01-31 23:44:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:13,535 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 23:44:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:13,536 INFO L225 Difference]: With dead ends: 644 [2022-01-31 23:44:13,536 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 23:44:13,536 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 23:44:13,539 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:13,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1087 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:44:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 23:44:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-01-31 23:44:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.2399150743099787) internal successors, (584), 483 states have internal predecessors, (584), 66 states have call successors, (66), 47 states have call predecessors, (66), 61 states have return successors, (83), 75 states have call predecessors, (83), 61 states have call successors, (83) [2022-01-31 23:44:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 733 transitions. [2022-01-31 23:44:13,678 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 733 transitions. Word has length 71 [2022-01-31 23:44:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:13,678 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 733 transitions. [2022-01-31 23:44:13,678 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 23:44:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 733 transitions. [2022-01-31 23:44:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:44:13,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:13,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:13,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 23:44:13,680 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-01-31 23:44:13,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919143001] [2022-01-31 23:44:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:13,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:13,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 23:44:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:13,873 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 23:44:13,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:13,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919143001] [2022-01-31 23:44:13,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919143001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:13,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:13,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:13,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134571692] [2022-01-31 23:44:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:13,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:13,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:13,874 INFO L87 Difference]: Start difference. First operand 599 states and 733 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:14,855 INFO L93 Difference]: Finished difference Result 637 states and 772 transitions. [2022-01-31 23:44:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:14,856 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 23:44:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:14,857 INFO L225 Difference]: With dead ends: 637 [2022-01-31 23:44:14,857 INFO L226 Difference]: Without dead ends: 593 [2022-01-31 23:44:14,857 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 23:44:14,857 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 623 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:14,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 949 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:44:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-31 23:44:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-01-31 23:44:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 466 states have (on average 1.240343347639485) internal successors, (578), 478 states have internal predecessors, (578), 65 states have call successors, (65), 47 states have call predecessors, (65), 61 states have return successors, (82), 74 states have call predecessors, (82), 60 states have call successors, (82) [2022-01-31 23:44:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 725 transitions. [2022-01-31 23:44:15,000 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 725 transitions. Word has length 71 [2022-01-31 23:44:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:15,001 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 725 transitions. [2022-01-31 23:44:15,001 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 23:44:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 725 transitions. [2022-01-31 23:44:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:15,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:15,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:15,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 23:44:15,002 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-01-31 23:44:15,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235166922] [2022-01-31 23:44:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:15,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:15,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 23:44:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:15,155 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 23:44:15,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235166922] [2022-01-31 23:44:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235166922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:15,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:15,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482144510] [2022-01-31 23:44:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:15,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:15,157 INFO L87 Difference]: Start difference. First operand 593 states and 725 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:16,104 INFO L93 Difference]: Finished difference Result 631 states and 764 transitions. [2022-01-31 23:44:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:16,104 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 23:44:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:16,105 INFO L225 Difference]: With dead ends: 631 [2022-01-31 23:44:16,105 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 23:44:16,105 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 23:44:16,106 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 632 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:16,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 886 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:44:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 23:44:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-01-31 23:44:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 455 states have (on average 1.2351648351648352) internal successors, (562), 467 states have internal predecessors, (562), 64 states have call successors, (64), 47 states have call predecessors, (64), 61 states have return successors, (81), 73 states have call predecessors, (81), 59 states have call successors, (81) [2022-01-31 23:44:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 707 transitions. [2022-01-31 23:44:16,237 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 707 transitions. Word has length 73 [2022-01-31 23:44:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:16,237 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 707 transitions. [2022-01-31 23:44:16,237 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 23:44:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 707 transitions. [2022-01-31 23:44:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:16,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:16,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 23:44:16,238 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-01-31 23:44:16,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:16,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615555975] [2022-01-31 23:44:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:16,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:16,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:16,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615555975] [2022-01-31 23:44:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615555975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:16,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:16,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:44:16,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143733193] [2022-01-31 23:44:16,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:16,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:44:16,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:44:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:16,485 INFO L87 Difference]: Start difference. First operand 581 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 23:44:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:19,594 INFO L93 Difference]: Finished difference Result 1245 states and 1510 transitions. [2022-01-31 23:44:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:44:19,595 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 23:44:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:19,598 INFO L225 Difference]: With dead ends: 1245 [2022-01-31 23:44:19,598 INFO L226 Difference]: Without dead ends: 1100 [2022-01-31 23:44:19,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:44:19,599 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 2001 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 4443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:19,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1198 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:44:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-01-31 23:44:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 892. [2022-01-31 23:44:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 703 states have (on average 1.2574679943100995) internal successors, (884), 722 states have internal predecessors, (884), 95 states have call successors, (95), 74 states have call predecessors, (95), 93 states have return successors, (124), 102 states have call predecessors, (124), 90 states have call successors, (124) [2022-01-31 23:44:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1103 transitions. [2022-01-31 23:44:19,816 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1103 transitions. Word has length 73 [2022-01-31 23:44:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:19,817 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1103 transitions. [2022-01-31 23:44:19,817 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 23:44:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1103 transitions. [2022-01-31 23:44:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:19,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:19,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 23:44:19,818 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-01-31 23:44:19,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:19,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240106017] [2022-01-31 23:44:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:19,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:19,820 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:19,995 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 23:44:19,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240106017] [2022-01-31 23:44:19,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [240106017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:19,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:19,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:44:19,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535049086] [2022-01-31 23:44:19,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:19,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:44:19,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:44:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:44:19,996 INFO L87 Difference]: Start difference. First operand 892 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 23:44:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:21,707 INFO L93 Difference]: Finished difference Result 1149 states and 1395 transitions. [2022-01-31 23:44:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:44:21,707 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 23:44:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:21,709 INFO L225 Difference]: With dead ends: 1149 [2022-01-31 23:44:21,709 INFO L226 Difference]: Without dead ends: 1044 [2022-01-31 23:44:21,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:44:21,710 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2826 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:21,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 1160 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:44:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-31 23:44:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 985. [2022-01-31 23:44:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 776 states have (on average 1.2448453608247423) internal successors, (966), 790 states have internal predecessors, (966), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-01-31 23:44:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1215 transitions. [2022-01-31 23:44:21,981 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1215 transitions. Word has length 73 [2022-01-31 23:44:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:21,981 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1215 transitions. [2022-01-31 23:44:21,981 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 23:44:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1215 transitions. [2022-01-31 23:44:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 23:44:21,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:21,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:21,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 23:44:21,983 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-01-31 23:44:21,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:21,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378111329] [2022-01-31 23:44:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:21,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:21,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:44:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:22,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378111329] [2022-01-31 23:44:22,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378111329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:22,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:22,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:44:22,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661486511] [2022-01-31 23:44:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:22,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:44:22,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:44:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:44:22,231 INFO L87 Difference]: Start difference. First operand 985 states and 1215 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 23:44:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:23,985 INFO L93 Difference]: Finished difference Result 1017 states and 1250 transitions. [2022-01-31 23:44:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:44:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-01-31 23:44:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:23,987 INFO L225 Difference]: With dead ends: 1017 [2022-01-31 23:44:23,987 INFO L226 Difference]: Without dead ends: 981 [2022-01-31 23:44:23,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:44:23,988 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 565 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:23,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2184 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:44:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-31 23:44:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-01-31 23:44:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 772 states have (on average 1.2435233160621761) internal successors, (960), 786 states have internal predecessors, (960), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-01-31 23:44:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1209 transitions. [2022-01-31 23:44:24,259 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1209 transitions. Word has length 77 [2022-01-31 23:44:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:24,260 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1209 transitions. [2022-01-31 23:44:24,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 23:44:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1209 transitions. [2022-01-31 23:44:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 23:44:24,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:24,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:24,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 23:44:24,261 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 1 times [2022-01-31 23:44:24,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114430971] [2022-01-31 23:44:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:24,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:24,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 23:44:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:24,447 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 23:44:24,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114430971] [2022-01-31 23:44:24,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114430971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:24,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:24,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:24,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400338059] [2022-01-31 23:44:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:24,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:24,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:24,448 INFO L87 Difference]: Start difference. First operand 981 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 23:44:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:25,630 INFO L93 Difference]: Finished difference Result 1034 states and 1265 transitions. [2022-01-31 23:44:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-01-31 23:44:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:25,632 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 23:44:25,633 INFO L226 Difference]: Without dead ends: 947 [2022-01-31 23:44:25,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:44:25,633 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 520 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:25,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1099 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:44:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-31 23:44:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-01-31 23:44:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 744 states have (on average 1.239247311827957) internal successors, (922), 758 states have internal predecessors, (922), 103 states have call successors, (103), 78 states have call predecessors, (103), 99 states have return successors, (132), 115 states have call predecessors, (132), 98 states have call successors, (132) [2022-01-31 23:44:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1157 transitions. [2022-01-31 23:44:25,877 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1157 transitions. Word has length 78 [2022-01-31 23:44:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:25,877 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1157 transitions. [2022-01-31 23:44:25,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 23:44:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1157 transitions. [2022-01-31 23:44:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 23:44:25,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:25,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:25,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 23:44:25,879 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-01-31 23:44:25,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599379993] [2022-01-31 23:44:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:25,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:25,881 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:25,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:25,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:25,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:26,071 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 23:44:26,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599379993] [2022-01-31 23:44:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599379993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:26,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:44:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725477014] [2022-01-31 23:44:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:26,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:44:26,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:44:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:44:26,073 INFO L87 Difference]: Start difference. First operand 947 states and 1157 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 23:44:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:27,214 INFO L93 Difference]: Finished difference Result 976 states and 1185 transitions. [2022-01-31 23:44:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:27,215 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 23:44:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:27,216 INFO L225 Difference]: With dead ends: 976 [2022-01-31 23:44:27,216 INFO L226 Difference]: Without dead ends: 899 [2022-01-31 23:44:27,217 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 23:44:27,217 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 203 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:27,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1048 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:44:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-31 23:44:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-01-31 23:44:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 710 states have (on average 1.2422535211267605) internal successors, (882), 724 states have internal predecessors, (882), 93 states have call successors, (93), 74 states have call predecessors, (93), 95 states have return successors, (120), 105 states have call predecessors, (120), 88 states have call successors, (120) [2022-01-31 23:44:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1095 transitions. [2022-01-31 23:44:27,462 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1095 transitions. Word has length 75 [2022-01-31 23:44:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:27,462 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1095 transitions. [2022-01-31 23:44:27,462 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 23:44:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1095 transitions. [2022-01-31 23:44:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 23:44:27,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:27,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:27,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 23:44:27,463 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-01-31 23:44:27,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:27,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813610850] [2022-01-31 23:44:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:27,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:27,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:44:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:44:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:27,607 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 23:44:27,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:27,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813610850] [2022-01-31 23:44:27,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [813610850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:27,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:27,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:27,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053689533] [2022-01-31 23:44:27,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:27,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:27,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:27,608 INFO L87 Difference]: Start difference. First operand 899 states and 1095 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 23:44:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:28,466 INFO L93 Difference]: Finished difference Result 944 states and 1143 transitions. [2022-01-31 23:44:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:28,466 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 23:44:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:28,468 INFO L225 Difference]: With dead ends: 944 [2022-01-31 23:44:28,468 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 23:44:28,469 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 23:44:28,469 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 307 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:28,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 857 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:44:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 23:44:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-01-31 23:44:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 696 states have (on average 1.2413793103448276) internal successors, (864), 710 states have internal predecessors, (864), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-01-31 23:44:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1071 transitions. [2022-01-31 23:44:28,691 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1071 transitions. Word has length 73 [2022-01-31 23:44:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:28,691 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1071 transitions. [2022-01-31 23:44:28,691 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 23:44:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1071 transitions. [2022-01-31 23:44:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 23:44:28,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:28,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:28,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 23:44:28,693 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-01-31 23:44:28,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437628129] [2022-01-31 23:44:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:28,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:28,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:44:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:44:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:28,888 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 23:44:28,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437628129] [2022-01-31 23:44:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437628129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:28,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:44:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327889911] [2022-01-31 23:44:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:28,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:44:28,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:44:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:44:28,890 INFO L87 Difference]: Start difference. First operand 883 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 23:44:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:29,771 INFO L93 Difference]: Finished difference Result 1161 states and 1426 transitions. [2022-01-31 23:44:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:44:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 77 [2022-01-31 23:44:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:29,773 INFO L225 Difference]: With dead ends: 1161 [2022-01-31 23:44:29,773 INFO L226 Difference]: Without dead ends: 869 [2022-01-31 23:44:29,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:44:29,774 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 622 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:29,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 959 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:44:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-31 23:44:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-01-31 23:44:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 682 states have (on average 1.2346041055718475) internal successors, (842), 696 states have internal predecessors, (842), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-01-31 23:44:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1049 transitions. [2022-01-31 23:44:29,996 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1049 transitions. Word has length 77 [2022-01-31 23:44:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:29,996 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1049 transitions. [2022-01-31 23:44:29,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 23:44:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1049 transitions. [2022-01-31 23:44:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 23:44:29,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:29,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:29,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 23:44:29,998 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-01-31 23:44:29,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:29,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567935852] [2022-01-31 23:44:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:29,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:30,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 23:44:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:44:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 23:44:30,168 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:30,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567935852] [2022-01-31 23:44:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567935852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:30,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:30,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:30,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942679081] [2022-01-31 23:44:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:30,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:30,169 INFO L87 Difference]: Start difference. First operand 869 states and 1049 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:30,931 INFO L93 Difference]: Finished difference Result 914 states and 1097 transitions. [2022-01-31 23:44:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:44:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-01-31 23:44:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:30,933 INFO L225 Difference]: With dead ends: 914 [2022-01-31 23:44:30,933 INFO L226 Difference]: Without dead ends: 849 [2022-01-31 23:44:30,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:44:30,933 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 284 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:30,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 858 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:44:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-31 23:44:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-01-31 23:44:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 666 states have (on average 1.2342342342342343) internal successors, (822), 680 states have internal predecessors, (822), 87 states have call successors, (87), 74 states have call predecessors, (87), 95 states have return successors, (112), 99 states have call predecessors, (112), 82 states have call successors, (112) [2022-01-31 23:44:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1021 transitions. [2022-01-31 23:44:31,141 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1021 transitions. Word has length 75 [2022-01-31 23:44:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:31,141 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1021 transitions. [2022-01-31 23:44:31,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1021 transitions. [2022-01-31 23:44:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 23:44:31,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:31,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:31,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 23:44:31,142 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-01-31 23:44:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124844044] [2022-01-31 23:44:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:31,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:31,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 23:44:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:44:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 23:44:31,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:31,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124844044] [2022-01-31 23:44:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124844044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:31,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:31,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:31,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096087590] [2022-01-31 23:44:31,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:31,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:31,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:31,301 INFO L87 Difference]: Start difference. First operand 849 states and 1021 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:32,132 INFO L93 Difference]: Finished difference Result 883 states and 1053 transitions. [2022-01-31 23:44:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:44:32,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-01-31 23:44:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:32,134 INFO L225 Difference]: With dead ends: 883 [2022-01-31 23:44:32,134 INFO L226 Difference]: Without dead ends: 788 [2022-01-31 23:44:32,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:44:32,134 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 257 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 787 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:44:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-31 23:44:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-01-31 23:44:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.2419354838709677) internal successors, (770), 631 states have internal predecessors, (770), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-01-31 23:44:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 951 transitions. [2022-01-31 23:44:32,309 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 951 transitions. Word has length 77 [2022-01-31 23:44:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:32,309 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 951 transitions. [2022-01-31 23:44:32,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 23:44:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 951 transitions. [2022-01-31 23:44:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 23:44:32,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:32,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:32,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 23:44:32,311 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-01-31 23:44:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:32,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042902415] [2022-01-31 23:44:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:32,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:32,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:44:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:44:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:32,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042902415] [2022-01-31 23:44:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042902415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:32,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:32,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:44:32,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889164385] [2022-01-31 23:44:32,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:32,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:44:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:44:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:44:32,499 INFO L87 Difference]: Start difference. First operand 788 states and 951 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-31 23:44:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:33,285 INFO L93 Difference]: Finished difference Result 1066 states and 1306 transitions. [2022-01-31 23:44:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:44:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 81 [2022-01-31 23:44:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:33,287 INFO L225 Difference]: With dead ends: 1066 [2022-01-31 23:44:33,287 INFO L226 Difference]: Without dead ends: 788 [2022-01-31 23:44:33,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:44:33,288 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 752 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:33,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 761 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:44:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-31 23:44:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-01-31 23:44:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.238709677419355) internal successors, (768), 631 states have internal predecessors, (768), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-01-31 23:44:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 949 transitions. [2022-01-31 23:44:33,474 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 949 transitions. Word has length 81 [2022-01-31 23:44:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 949 transitions. [2022-01-31 23:44:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-31 23:44:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 949 transitions. [2022-01-31 23:44:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 23:44:33,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:33,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:33,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 23:44:33,476 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-01-31 23:44:33,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:33,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666125642] [2022-01-31 23:44:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:33,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:33,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-31 23:44:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:33,701 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 23:44:33,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666125642] [2022-01-31 23:44:33,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [666125642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:33,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:33,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:33,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112727549] [2022-01-31 23:44:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:33,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:33,702 INFO L87 Difference]: Start difference. First operand 788 states and 949 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 23:44:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:35,413 INFO L93 Difference]: Finished difference Result 833 states and 994 transitions. [2022-01-31 23:44:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:44:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2022-01-31 23:44:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:35,415 INFO L225 Difference]: With dead ends: 833 [2022-01-31 23:44:35,415 INFO L226 Difference]: Without dead ends: 700 [2022-01-31 23:44:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:44:35,416 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 886 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:35,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1546 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:44:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-31 23:44:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 359. [2022-01-31 23:44:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 282 states have (on average 1.2375886524822695) internal successors, (349), 286 states have internal predecessors, (349), 39 states have call successors, (39), 35 states have call predecessors, (39), 37 states have return successors, (43), 39 states have call predecessors, (43), 35 states have call successors, (43) [2022-01-31 23:44:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2022-01-31 23:44:35,513 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 78 [2022-01-31 23:44:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:35,513 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2022-01-31 23:44:35,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 23:44:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2022-01-31 23:44:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 23:44:35,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:35,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:35,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 23:44:35,514 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-01-31 23:44:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798614366] [2022-01-31 23:44:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:35,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:35,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 23:44:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 23:44:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:44:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-31 23:44:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:35,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798614366] [2022-01-31 23:44:35,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [798614366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:35,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:35,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:44:35,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121693471] [2022-01-31 23:44:35,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:35,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:44:35,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:44:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:44:35,746 INFO L87 Difference]: Start difference. First operand 359 states and 431 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 23:44:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:36,447 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2022-01-31 23:44:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:44:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) Word has length 79 [2022-01-31 23:44:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:36,448 INFO L225 Difference]: With dead ends: 361 [2022-01-31 23:44:36,448 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 23:44:36,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:44:36,448 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 193 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:36,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1510 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:44:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 23:44:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-01-31 23:44:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 219 states have (on average 1.2557077625570776) internal successors, (275), 221 states have internal predecessors, (275), 31 states have call successors, (31), 29 states have call predecessors, (31), 31 states have return successors, (36), 32 states have call predecessors, (36), 28 states have call successors, (36) [2022-01-31 23:44:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 342 transitions. [2022-01-31 23:44:36,523 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 342 transitions. Word has length 79 [2022-01-31 23:44:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:36,523 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 342 transitions. [2022-01-31 23:44:36,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 23:44:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 342 transitions. [2022-01-31 23:44:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 23:44:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:36,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:36,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 23:44:36,524 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-01-31 23:44:36,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:36,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008728698] [2022-01-31 23:44:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:36,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:36,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:44:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:36,663 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 23:44:36,663 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008728698] [2022-01-31 23:44:36,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008728698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:36,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:36,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:36,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764815146] [2022-01-31 23:44:36,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:36,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:36,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:36,664 INFO L87 Difference]: Start difference. First operand 282 states and 342 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 23:44:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:37,088 INFO L93 Difference]: Finished difference Result 365 states and 428 transitions. [2022-01-31 23:44:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:44:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-01-31 23:44:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:37,089 INFO L225 Difference]: With dead ends: 365 [2022-01-31 23:44:37,089 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 23:44:37,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:37,090 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 216 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:37,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 674 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:44:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 23:44:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 235. [2022-01-31 23:44:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 183 states have internal predecessors, (211), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-01-31 23:44:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 267 transitions. [2022-01-31 23:44:37,154 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 267 transitions. Word has length 83 [2022-01-31 23:44:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:37,154 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 267 transitions. [2022-01-31 23:44:37,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 23:44:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 267 transitions. [2022-01-31 23:44:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 23:44:37,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:37,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:37,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 23:44:37,155 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-01-31 23:44:37,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432728560] [2022-01-31 23:44:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:37,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:37,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 23:44:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:44:37,395 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432728560] [2022-01-31 23:44:37,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [432728560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:37,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:37,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:37,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025415385] [2022-01-31 23:44:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:37,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:37,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:37,396 INFO L87 Difference]: Start difference. First operand 235 states and 267 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-31 23:44:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:38,028 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-01-31 23:44:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2022-01-31 23:44:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:38,029 INFO L225 Difference]: With dead ends: 287 [2022-01-31 23:44:38,029 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 23:44:38,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:44:38,030 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 386 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:38,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 968 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:44:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 23:44:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2022-01-31 23:44:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 182 states have internal predecessors, (207), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-01-31 23:44:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-01-31 23:44:38,100 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 99 [2022-01-31 23:44:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:38,101 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-01-31 23:44:38,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-31 23:44:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-01-31 23:44:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 23:44:38,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:38,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:38,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 23:44:38,101 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-01-31 23:44:38,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856087826] [2022-01-31 23:44:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:38,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:38,103 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 23:44:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:38,331 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 23:44:38,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:38,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856087826] [2022-01-31 23:44:38,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [856087826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:38,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:38,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:44:38,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686380654] [2022-01-31 23:44:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:44:38,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:44:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:38,332 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 23:44:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:39,772 INFO L93 Difference]: Finished difference Result 508 states and 570 transitions. [2022-01-31 23:44:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 23:44:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 101 [2022-01-31 23:44:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:39,774 INFO L225 Difference]: With dead ends: 508 [2022-01-31 23:44:39,774 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 23:44:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:44:39,774 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 633 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:39,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 952 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:44:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 23:44:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 349. [2022-01-31 23:44:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 269 states have (on average 1.1486988847583643) internal successors, (309), 274 states have internal predecessors, (309), 40 states have call successors, (40), 38 states have call predecessors, (40), 39 states have return successors, (41), 37 states have call predecessors, (41), 38 states have call successors, (41) [2022-01-31 23:44:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2022-01-31 23:44:39,870 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 101 [2022-01-31 23:44:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:39,870 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2022-01-31 23:44:39,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-31 23:44:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2022-01-31 23:44:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 23:44:39,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:39,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:39,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 23:44:39,871 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-01-31 23:44:39,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42980941] [2022-01-31 23:44:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:39,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:39,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:39,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:39,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:39,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:39,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-31 23:44:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 23:44:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,100 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 23:44:40,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42980941] [2022-01-31 23:44:40,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42980941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:40,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:40,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 23:44:40,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450182834] [2022-01-31 23:44:40,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 23:44:40,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 23:44:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:44:40,101 INFO L87 Difference]: Start difference. First operand 349 states and 390 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-31 23:44:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:40,642 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2022-01-31 23:44:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:44:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-01-31 23:44:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:40,643 INFO L225 Difference]: With dead ends: 367 [2022-01-31 23:44:40,643 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 23:44:40,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:44:40,644 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 59 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:40,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1040 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:44:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 23:44:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 146. [2022-01-31 23:44:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 23:44:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-01-31 23:44:40,688 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 101 [2022-01-31 23:44:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:40,688 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-01-31 23:44:40,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-31 23:44:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-01-31 23:44:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 23:44:40,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:40,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:40,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 23:44:40,689 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 1 times [2022-01-31 23:44:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619256528] [2022-01-31 23:44:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:40,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:40,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 23:44:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:44:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:40,850 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 23:44:40,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619256528] [2022-01-31 23:44:40,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [619256528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:40,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:40,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:44:40,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516893470] [2022-01-31 23:44:40,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:40,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:44:40,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:44:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:44:40,851 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-31 23:44:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:41,137 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-01-31 23:44:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:44:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-01-31 23:44:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:41,138 INFO L225 Difference]: With dead ends: 192 [2022-01-31 23:44:41,138 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 23:44:41,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:44:41,138 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 147 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:41,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 422 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:44:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 23:44:41,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-01-31 23:44:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 119 states have internal predecessors, (131), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 23:44:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-01-31 23:44:41,185 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 116 [2022-01-31 23:44:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:41,185 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-01-31 23:44:41,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-31 23:44:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-01-31 23:44:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 23:44:41,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:41,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:41,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 23:44:41,186 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-01-31 23:44:41,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:41,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192196044] [2022-01-31 23:44:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:41,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:41,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 23:44:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:44:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:41,410 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 23:44:41,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:41,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192196044] [2022-01-31 23:44:41,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192196044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:41,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:41,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:44:41,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515360547] [2022-01-31 23:44:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:41,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:44:41,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:44:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:44:41,411 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 23:44:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:42,142 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-01-31 23:44:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 23:44:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-01-31 23:44:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:42,143 INFO L225 Difference]: With dead ends: 292 [2022-01-31 23:44:42,143 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 23:44:42,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:44:42,143 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 254 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:42,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 377 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:44:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 23:44:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 23:44:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 119 states have internal predecessors, (130), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 23:44:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-01-31 23:44:42,189 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-01-31 23:44:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:42,189 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-01-31 23:44:42,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 23:44:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-01-31 23:44:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 23:44:42,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:44:42,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:44:42,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 23:44:42,190 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:44:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:44:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-01-31 23:44:42,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:44:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322746926] [2022-01-31 23:44:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:44:42,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:44:42,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:44:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:44:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:44:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:44:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 23:44:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:44:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-31 23:44:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 23:44:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:44:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:44:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 23:44:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:44:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:44:42,540 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 23:44:42,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:44:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322746926] [2022-01-31 23:44:42,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322746926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:44:42,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:44:42,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:44:42,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801809708] [2022-01-31 23:44:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:44:42,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:44:42,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:44:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:44:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:44:42,541 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 23:44:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:44:43,083 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-01-31 23:44:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:44:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-01-31 23:44:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:44:43,084 INFO L225 Difference]: With dead ends: 152 [2022-01-31 23:44:43,084 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 23:44:43,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:44:43,085 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 271 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:44:43,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 332 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:44:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 23:44:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 23:44:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 23:44:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 23:44:43,085 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-01-31 23:44:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:44:43,085 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 23:44:43,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 23:44:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 23:44:43,086 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 23:44:43,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:44:43,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 23:44:43,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.