/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:41:16,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:41:16,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:41:16,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:41:16,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-07 00:41:16,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-07 00:41:16,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-07 00:41:16,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-07 00:41:16,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-07 00:41:16,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-07 00:41:16,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-07 00:41:16,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-07 00:41:16,953 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-07 00:41:16,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-07 00:41:16,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-07 00:41:16,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-07 00:41:16,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-07 00:41:16,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-07 00:41:16,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:41:16,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:41:16,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:41:16,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:41:16,969 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:41:16,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:41:16,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:41:16,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:41:16,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:41:16,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:41:16,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:41:16,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:41:16,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:41:16,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:41:16,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:41:16,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:41:16,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:41:16,973 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:41:16,973 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:41:16,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:41:16,973 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:41:16,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:41:17,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:41:17,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:41:17,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:41:17,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:41:17,133 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:41:17,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-04-07 00:41:17,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018270e95/9301d5a490f4434395ae940d12d5a4e1/FLAG9c7f7cf47 [2022-04-07 00:41:17,596 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:41:17,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-04-07 00:41:17,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018270e95/9301d5a490f4434395ae940d12d5a4e1/FLAG9c7f7cf47 [2022-04-07 00:41:17,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018270e95/9301d5a490f4434395ae940d12d5a4e1 [2022-04-07 00:41:17,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:41:17,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:41:17,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:41:17,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:41:17,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:41:17,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:41:17" (1/1) ... [2022-04-07 00:41:17,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acf9921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:17, skipping insertion in model container [2022-04-07 00:41:17,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:41:17" (1/1) ... [2022-04-07 00:41:17,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:41:18,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:41:18,141 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-04-07 00:41:18,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:41:18,296 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:41:18,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-04-07 00:41:18,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:41:18,425 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:41:18,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18 WrapperNode [2022-04-07 00:41:18,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:41:18,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:41:18,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:41:18,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:41:18,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:41:18,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:41:18,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:41:18,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:41:18,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (1/1) ... [2022-04-07 00:41:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:41:18,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:41:18,549 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) [2022-04-07 00:41:18,587 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 [2022-04-07 00:41:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:41:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:41:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:41:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-04-07 00:41:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-04-07 00:41:18,606 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-04-07 00:41:18,606 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-04-07 00:41:18,606 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-04-07 00:41:18,606 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-04-07 00:41:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-07 00:41:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-04-07 00:41:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:41:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-04-07 00:41:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-04-07 00:41:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:41:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:41:18,787 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:41:18,789 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:41:18,920 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:18,989 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-04-07 00:41:18,989 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-04-07 00:41:18,993 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,013 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-04-07 00:41:19,013 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-04-07 00:41:19,042 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,064 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-07 00:41:19,065 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-07 00:41:19,119 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,157 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-04-07 00:41:19,157 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-04-07 00:41:19,158 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-04-07 00:41:19,161 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-04-07 00:41:19,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-04-07 00:41:19,267 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-07 00:41:19,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-07 00:41:19,303 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,313 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-04-07 00:41:19,313 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-04-07 00:41:19,315 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,433 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-04-07 00:41:19,433 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-04-07 00:41:19,441 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:41:19,443 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:41:19,444 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:41:19,451 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:41:19,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:41:19,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:41:19,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:41:19 BoogieIcfgContainer [2022-04-07 00:41:19,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:41:19,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:41:19,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:41:19,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:41:19,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:41:17" (1/3) ... [2022-04-07 00:41:19,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358ca1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:41:19, skipping insertion in model container [2022-04-07 00:41:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:41:18" (2/3) ... [2022-04-07 00:41:19,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358ca1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:41:19, skipping insertion in model container [2022-04-07 00:41:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:41:19" (3/3) ... [2022-04-07 00:41:19,467 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2022-04-07 00:41:19,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:41:19,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:41:19,499 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:41:19,504 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-04-07 00:41:19,504 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:41:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-07 00:41:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-07 00:41:19,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:19,526 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:19,527 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 1 times [2022-04-07 00:41:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785376040] [2022-04-07 00:41:19,543 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 2 times [2022-04-07 00:41:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697415316] [2022-04-07 00:41:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:19,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697415316] [2022-04-07 00:41:19,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697415316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:19,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:19,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:41:19,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:19,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785376040] [2022-04-07 00:41:19,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785376040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:19,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:19,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:41:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846789518] [2022-04-07 00:41:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:19,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:41:19,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:41:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:41:19,956 INFO L87 Difference]: Start difference. First operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-07 00:41:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:21,853 INFO L93 Difference]: Finished difference Result 1047 states and 1683 transitions. [2022-04-07 00:41:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:41:21,855 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 [2022-04-07 00:41:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:21,887 INFO L225 Difference]: With dead ends: 1047 [2022-04-07 00:41:21,887 INFO L226 Difference]: Without dead ends: 665 [2022-04-07 00:41:21,893 INFO L912 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 [2022-04-07 00:41:21,895 INFO L913 BasicCegarLoop]: 741 mSDtfsCounter, 399 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:21,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1013 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-07 00:41:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-04-07 00:41:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2022-04-07 00:41:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 378 states have (on average 1.4576719576719577) internal successors, (551), 397 states have internal predecessors, (551), 103 states have call successors, (103), 29 states have call predecessors, (103), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-07 00:41:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 740 transitions. [2022-04-07 00:41:22,005 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 740 transitions. Word has length 20 [2022-04-07 00:41:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:22,005 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 740 transitions. [2022-04-07 00:41:22,005 INFO L479 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) [2022-04-07 00:41:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 740 transitions. [2022-04-07 00:41:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-07 00:41:22,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:22,006 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:22,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:41:22,007 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 1 times [2022-04-07 00:41:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:22,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341121365] [2022-04-07 00:41:22,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 2 times [2022-04-07 00:41:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496504996] [2022-04-07 00:41:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:22,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:22,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496504996] [2022-04-07 00:41:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496504996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:22,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:22,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:22,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341121365] [2022-04-07 00:41:22,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341121365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:22,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:22,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046159236] [2022-04-07 00:41:22,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:22,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:41:22,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:41:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:41:22,142 INFO L87 Difference]: Start difference. First operand 509 states and 740 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:23,425 INFO L93 Difference]: Finished difference Result 967 states and 1429 transitions. [2022-04-07 00:41:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:41:23,426 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 [2022-04-07 00:41:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:23,434 INFO L225 Difference]: With dead ends: 967 [2022-04-07 00:41:23,435 INFO L226 Difference]: Without dead ends: 846 [2022-04-07 00:41:23,436 INFO L912 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 [2022-04-07 00:41:23,438 INFO L913 BasicCegarLoop]: 843 mSDtfsCounter, 1498 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:23,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1015 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:41:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-04-07 00:41:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 664. [2022-04-07 00:41:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 502 states have (on average 1.408366533864542) internal successors, (707), 510 states have internal predecessors, (707), 112 states have call successors, (112), 40 states have call predecessors, (112), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-04-07 00:41:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 964 transitions. [2022-04-07 00:41:23,522 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 964 transitions. Word has length 25 [2022-04-07 00:41:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:23,523 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 964 transitions. [2022-04-07 00:41:23,523 INFO L479 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) [2022-04-07 00:41:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 964 transitions. [2022-04-07 00:41:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-07 00:41:23,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:23,530 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:23,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-07 00:41:23,530 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 1 times [2022-04-07 00:41:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2029235890] [2022-04-07 00:41:23,534 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 2 times [2022-04-07 00:41:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677594045] [2022-04-07 00:41:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:23,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:23,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:23,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:23,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677594045] [2022-04-07 00:41:23,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677594045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:23,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:23,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:23,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:23,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2029235890] [2022-04-07 00:41:23,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2029235890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:23,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:23,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:23,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970418999] [2022-04-07 00:41:23,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:23,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:41:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:41:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:41:23,680 INFO L87 Difference]: Start difference. First operand 664 states and 964 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:24,720 INFO L93 Difference]: Finished difference Result 1148 states and 1650 transitions. [2022-04-07 00:41:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:41:24,721 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 [2022-04-07 00:41:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:24,725 INFO L225 Difference]: With dead ends: 1148 [2022-04-07 00:41:24,725 INFO L226 Difference]: Without dead ends: 970 [2022-04-07 00:41:24,726 INFO L912 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 [2022-04-07 00:41:24,728 INFO L913 BasicCegarLoop]: 725 mSDtfsCounter, 1529 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:24,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 867 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:41:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-04-07 00:41:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 789. [2022-04-07 00:41:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 611 states have (on average 1.4042553191489362) internal successors, (858), 615 states have internal predecessors, (858), 114 states have call successors, (114), 46 states have call predecessors, (114), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-04-07 00:41:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1135 transitions. [2022-04-07 00:41:24,797 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1135 transitions. Word has length 30 [2022-04-07 00:41:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:24,798 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1135 transitions. [2022-04-07 00:41:24,798 INFO L479 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) [2022-04-07 00:41:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1135 transitions. [2022-04-07 00:41:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-07 00:41:24,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:24,800 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:24,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-07 00:41:24,801 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 1 times [2022-04-07 00:41:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546861914] [2022-04-07 00:41:24,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 2 times [2022-04-07 00:41:24,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:24,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061467956] [2022-04-07 00:41:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:24,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:24,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061467956] [2022-04-07 00:41:24,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061467956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:24,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:24,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:24,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546861914] [2022-04-07 00:41:24,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546861914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:24,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:24,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:24,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928669264] [2022-04-07 00:41:24,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:24,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:41:24,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:41:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:41:24,903 INFO L87 Difference]: Start difference. First operand 789 states and 1135 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:26,538 INFO L93 Difference]: Finished difference Result 1630 states and 2449 transitions. [2022-04-07 00:41:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:41:26,603 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 [2022-04-07 00:41:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:26,718 INFO L225 Difference]: With dead ends: 1630 [2022-04-07 00:41:26,719 INFO L226 Difference]: Without dead ends: 1344 [2022-04-07 00:41:26,720 INFO L912 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 [2022-04-07 00:41:26,720 INFO L913 BasicCegarLoop]: 1009 mSDtfsCounter, 1111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:26,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1265 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:41:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-04-07 00:41:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 907. [2022-04-07 00:41:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 708 states have (on average 1.4138418079096045) internal successors, (1001), 711 states have internal predecessors, (1001), 127 states have call successors, (127), 54 states have call predecessors, (127), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-04-07 00:41:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1348 transitions. [2022-04-07 00:41:26,848 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1348 transitions. Word has length 31 [2022-04-07 00:41:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:26,848 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1348 transitions. [2022-04-07 00:41:26,848 INFO L479 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) [2022-04-07 00:41:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1348 transitions. [2022-04-07 00:41:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-07 00:41:26,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:26,849 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:26,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-07 00:41:26,850 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 1 times [2022-04-07 00:41:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:26,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225754157] [2022-04-07 00:41:26,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 2 times [2022-04-07 00:41:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047209376] [2022-04-07 00:41:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:26,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:26,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047209376] [2022-04-07 00:41:27,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047209376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:27,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:27,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:27,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225754157] [2022-04-07 00:41:27,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225754157] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:27,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:27,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24797967] [2022-04-07 00:41:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:27,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:41:27,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:41:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:41:27,017 INFO L87 Difference]: Start difference. First operand 907 states and 1348 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 00:41:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:28,818 INFO L93 Difference]: Finished difference Result 1632 states and 2483 transitions. [2022-04-07 00:41:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:41:28,819 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 [2022-04-07 00:41:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:28,824 INFO L225 Difference]: With dead ends: 1632 [2022-04-07 00:41:28,824 INFO L226 Difference]: Without dead ends: 1046 [2022-04-07 00:41:28,827 INFO L912 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 [2022-04-07 00:41:28,827 INFO L913 BasicCegarLoop]: 743 mSDtfsCounter, 3353 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:28,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3359 Valid, 890 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:41:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-07 00:41:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 835. [2022-04-07 00:41:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 649 states have (on average 1.399075500770416) internal successors, (908), 653 states have internal predecessors, (908), 118 states have call successors, (118), 50 states have call predecessors, (118), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-04-07 00:41:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1203 transitions. [2022-04-07 00:41:28,941 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1203 transitions. Word has length 32 [2022-04-07 00:41:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:28,942 INFO L478 AbstractCegarLoop]: Abstraction has 835 states and 1203 transitions. [2022-04-07 00:41:28,942 INFO L479 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) [2022-04-07 00:41:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1203 transitions. [2022-04-07 00:41:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-07 00:41:28,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:28,943 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:28,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-07 00:41:28,944 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 1 times [2022-04-07 00:41:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116263751] [2022-04-07 00:41:28,945 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 2 times [2022-04-07 00:41:28,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:28,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092077070] [2022-04-07 00:41:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:29,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:29,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092077070] [2022-04-07 00:41:29,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092077070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:29,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:29,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:29,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:29,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116263751] [2022-04-07 00:41:29,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116263751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:29,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:29,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455877002] [2022-04-07 00:41:29,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:29,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:41:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:41:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:41:29,062 INFO L87 Difference]: Start difference. First operand 835 states and 1203 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:30,672 INFO L93 Difference]: Finished difference Result 965 states and 1425 transitions. [2022-04-07 00:41:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:41:30,673 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 [2022-04-07 00:41:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:30,677 INFO L225 Difference]: With dead ends: 965 [2022-04-07 00:41:30,677 INFO L226 Difference]: Without dead ends: 961 [2022-04-07 00:41:30,677 INFO L912 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 [2022-04-07 00:41:30,678 INFO L913 BasicCegarLoop]: 713 mSDtfsCounter, 771 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:30,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 982 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:41:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-04-07 00:41:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 834. [2022-04-07 00:41:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 649 states have (on average 1.3959938366718028) internal successors, (906), 652 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-04-07 00:41:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1200 transitions. [2022-04-07 00:41:30,766 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1200 transitions. Word has length 36 [2022-04-07 00:41:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:30,767 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1200 transitions. [2022-04-07 00:41:30,767 INFO L479 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) [2022-04-07 00:41:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1200 transitions. [2022-04-07 00:41:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-07 00:41:30,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:30,769 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:30,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-07 00:41:30,770 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 1 times [2022-04-07 00:41:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:30,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368563268] [2022-04-07 00:41:30,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 2 times [2022-04-07 00:41:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:30,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396606610] [2022-04-07 00:41:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:30,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:30,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396606610] [2022-04-07 00:41:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396606610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:30,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:30,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:30,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368563268] [2022-04-07 00:41:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368563268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:30,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:30,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851213372] [2022-04-07 00:41:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:30,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:41:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:41:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:41:30,886 INFO L87 Difference]: Start difference. First operand 834 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:33,120 INFO L93 Difference]: Finished difference Result 1417 states and 2024 transitions. [2022-04-07 00:41:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:41:33,120 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 [2022-04-07 00:41:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:33,125 INFO L225 Difference]: With dead ends: 1417 [2022-04-07 00:41:33,125 INFO L226 Difference]: Without dead ends: 999 [2022-04-07 00:41:33,127 INFO L912 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 [2022-04-07 00:41:33,127 INFO L913 BasicCegarLoop]: 821 mSDtfsCounter, 1494 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:33,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1252 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-07 00:41:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-04-07 00:41:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2022-04-07 00:41:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 571 states have (on average 1.3870402802101576) internal successors, (792), 575 states have internal predecessors, (792), 106 states have call successors, (106), 45 states have call predecessors, (106), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-04-07 00:41:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1029 transitions. [2022-04-07 00:41:33,242 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1029 transitions. Word has length 39 [2022-04-07 00:41:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:33,243 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1029 transitions. [2022-04-07 00:41:33,243 INFO L479 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) [2022-04-07 00:41:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1029 transitions. [2022-04-07 00:41:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-07 00:41:33,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:33,244 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:33,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-07 00:41:33,244 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 1 times [2022-04-07 00:41:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169086225] [2022-04-07 00:41:33,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 2 times [2022-04-07 00:41:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580769892] [2022-04-07 00:41:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:33,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:33,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:33,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580769892] [2022-04-07 00:41:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580769892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:33,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:33,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:33,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169086225] [2022-04-07 00:41:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169086225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:33,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:33,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:41:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981085047] [2022-04-07 00:41:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:33,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:41:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:41:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:41:33,425 INFO L87 Difference]: Start difference. First operand 736 states and 1029 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:41:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:35,219 INFO L93 Difference]: Finished difference Result 979 states and 1409 transitions. [2022-04-07 00:41:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:41:35,220 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 [2022-04-07 00:41:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:35,249 INFO L225 Difference]: With dead ends: 979 [2022-04-07 00:41:35,249 INFO L226 Difference]: Without dead ends: 959 [2022-04-07 00:41:35,250 INFO L912 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 [2022-04-07 00:41:35,250 INFO L913 BasicCegarLoop]: 672 mSDtfsCounter, 1124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:35,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 773 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-07 00:41:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-07 00:41:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 762. [2022-04-07 00:41:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3983193277310924) internal successors, (832), 608 states have internal predecessors, (832), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-04-07 00:41:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1064 transitions. [2022-04-07 00:41:35,368 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1064 transitions. Word has length 40 [2022-04-07 00:41:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:35,369 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1064 transitions. [2022-04-07 00:41:35,370 INFO L479 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) [2022-04-07 00:41:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1064 transitions. [2022-04-07 00:41:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:41:35,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:35,373 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:35,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-07 00:41:35,373 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 1 times [2022-04-07 00:41:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122188176] [2022-04-07 00:41:35,374 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 2 times [2022-04-07 00:41:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64503806] [2022-04-07 00:41:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:35,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:35,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-07 00:41:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64503806] [2022-04-07 00:41:35,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64503806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:35,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:35,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:35,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122188176] [2022-04-07 00:41:35,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122188176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:35,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:35,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045779731] [2022-04-07 00:41:35,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:35,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:41:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:41:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:41:35,488 INFO L87 Difference]: Start difference. First operand 762 states and 1064 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:41:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:36,811 INFO L93 Difference]: Finished difference Result 1167 states and 1671 transitions. [2022-04-07 00:41:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:41:36,815 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 [2022-04-07 00:41:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:36,819 INFO L225 Difference]: With dead ends: 1167 [2022-04-07 00:41:36,819 INFO L226 Difference]: Without dead ends: 942 [2022-04-07 00:41:36,819 INFO L912 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 [2022-04-07 00:41:36,820 INFO L913 BasicCegarLoop]: 791 mSDtfsCounter, 1663 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:36,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1318 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:41:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-04-07 00:41:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 762. [2022-04-07 00:41:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3966386554621848) internal successors, (831), 608 states have internal predecessors, (831), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-04-07 00:41:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1063 transitions. [2022-04-07 00:41:36,981 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1063 transitions. Word has length 46 [2022-04-07 00:41:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:36,981 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1063 transitions. [2022-04-07 00:41:36,981 INFO L479 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) [2022-04-07 00:41:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1063 transitions. [2022-04-07 00:41:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-07 00:41:36,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:36,998 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:36,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-07 00:41:36,998 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 1 times [2022-04-07 00:41:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366220047] [2022-04-07 00:41:36,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 2 times [2022-04-07 00:41:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127479684] [2022-04-07 00:41:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:37,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:37,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:37,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-07 00:41:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:37,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127479684] [2022-04-07 00:41:37,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127479684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:37,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:37,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:37,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:37,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366220047] [2022-04-07 00:41:37,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366220047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:37,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:37,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259343171] [2022-04-07 00:41:37,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:37,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:41:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:41:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:41:37,141 INFO L87 Difference]: Start difference. First operand 762 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:41:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:38,563 INFO L93 Difference]: Finished difference Result 964 states and 1383 transitions. [2022-04-07 00:41:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:41:38,563 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 [2022-04-07 00:41:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:38,566 INFO L225 Difference]: With dead ends: 964 [2022-04-07 00:41:38,566 INFO L226 Difference]: Without dead ends: 897 [2022-04-07 00:41:38,567 INFO L912 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 [2022-04-07 00:41:38,567 INFO L913 BasicCegarLoop]: 667 mSDtfsCounter, 1507 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:38,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1140 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:41:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-04-07 00:41:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 751. [2022-04-07 00:41:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 588 states have (on average 1.3979591836734695) internal successors, (822), 601 states have internal predecessors, (822), 106 states have call successors, (106), 46 states have call predecessors, (106), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-04-07 00:41:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1050 transitions. [2022-04-07 00:41:38,678 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1050 transitions. Word has length 47 [2022-04-07 00:41:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:38,678 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1050 transitions. [2022-04-07 00:41:38,678 INFO L479 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) [2022-04-07 00:41:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1050 transitions. [2022-04-07 00:41:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:41:38,680 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:38,680 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:38,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-07 00:41:38,680 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 1 times [2022-04-07 00:41:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428994955] [2022-04-07 00:41:38,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 2 times [2022-04-07 00:41:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252515857] [2022-04-07 00:41:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:38,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:38,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252515857] [2022-04-07 00:41:38,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252515857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:38,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:38,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:41:38,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:38,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428994955] [2022-04-07 00:41:38,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428994955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:38,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:38,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:41:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082883651] [2022-04-07 00:41:38,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:38,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:41:38,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:41:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:41:38,851 INFO L87 Difference]: Start difference. First operand 751 states and 1050 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:41:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:41,313 INFO L93 Difference]: Finished difference Result 1067 states and 1515 transitions. [2022-04-07 00:41:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:41:41,314 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 [2022-04-07 00:41:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:41,318 INFO L225 Difference]: With dead ends: 1067 [2022-04-07 00:41:41,318 INFO L226 Difference]: Without dead ends: 1006 [2022-04-07 00:41:41,319 INFO L912 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 [2022-04-07 00:41:41,319 INFO L913 BasicCegarLoop]: 753 mSDtfsCounter, 1832 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:41,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 1732 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-07 00:41:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-04-07 00:41:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 794. [2022-04-07 00:41:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 623 states have (on average 1.3964686998394864) internal successors, (870), 635 states have internal predecessors, (870), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-04-07 00:41:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-04-07 00:41:41,426 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 48 [2022-04-07 00:41:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:41,426 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-04-07 00:41:41,426 INFO L479 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) [2022-04-07 00:41:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-04-07 00:41:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:41:41,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:41,428 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:41,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-07 00:41:41,428 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 1 times [2022-04-07 00:41:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:41,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35282552] [2022-04-07 00:41:41,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 2 times [2022-04-07 00:41:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:41,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958365724] [2022-04-07 00:41:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958365724] [2022-04-07 00:41:41,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958365724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:41,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:41,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:41:41,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35282552] [2022-04-07 00:41:41,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35282552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:41,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:41,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:41:41,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931808761] [2022-04-07 00:41:41,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:41,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:41:41,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:41:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:41:41,603 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:41:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:43,694 INFO L93 Difference]: Finished difference Result 952 states and 1368 transitions. [2022-04-07 00:41:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:41:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-04-07 00:41:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:43,698 INFO L225 Difference]: With dead ends: 952 [2022-04-07 00:41:43,698 INFO L226 Difference]: Without dead ends: 924 [2022-04-07 00:41:43,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:41:43,699 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1180 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:43,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1456 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-07 00:41:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-04-07 00:41:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 797. [2022-04-07 00:41:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 626 states have (on average 1.3961661341853036) internal successors, (874), 638 states have internal predecessors, (874), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-04-07 00:41:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1115 transitions. [2022-04-07 00:41:43,818 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1115 transitions. Word has length 50 [2022-04-07 00:41:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:43,818 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1115 transitions. [2022-04-07 00:41:43,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:41:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1115 transitions. [2022-04-07 00:41:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:41:43,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:43,824 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:43,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-07 00:41:43,824 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 1 times [2022-04-07 00:41:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003649063] [2022-04-07 00:41:43,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 2 times [2022-04-07 00:41:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835716128] [2022-04-07 00:41:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:43,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835716128] [2022-04-07 00:41:43,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835716128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:43,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:43,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:43,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003649063] [2022-04-07 00:41:43,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003649063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:43,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:43,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999689599] [2022-04-07 00:41:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:43,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:41:43,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:41:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:41:43,992 INFO L87 Difference]: Start difference. First operand 797 states and 1115 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:41:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:46,178 INFO L93 Difference]: Finished difference Result 978 states and 1402 transitions. [2022-04-07 00:41:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:41:46,179 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 [2022-04-07 00:41:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:46,189 INFO L225 Difference]: With dead ends: 978 [2022-04-07 00:41:46,189 INFO L226 Difference]: Without dead ends: 914 [2022-04-07 00:41:46,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:41:46,191 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1576 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:46,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1818 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-07 00:41:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-04-07 00:41:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 792. [2022-04-07 00:41:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 621 states have (on average 1.391304347826087) internal successors, (864), 633 states have internal predecessors, (864), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-04-07 00:41:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1105 transitions. [2022-04-07 00:41:46,516 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1105 transitions. Word has length 50 [2022-04-07 00:41:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:46,516 INFO L478 AbstractCegarLoop]: Abstraction has 792 states and 1105 transitions. [2022-04-07 00:41:46,516 INFO L479 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) [2022-04-07 00:41:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1105 transitions. [2022-04-07 00:41:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-07 00:41:46,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:46,518 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:46,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-07 00:41:46,518 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 1 times [2022-04-07 00:41:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:46,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564913904] [2022-04-07 00:41:46,519 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:46,519 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 2 times [2022-04-07 00:41:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073061278] [2022-04-07 00:41:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073061278] [2022-04-07 00:41:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073061278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:46,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:46,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:46,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564913904] [2022-04-07 00:41:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564913904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:46,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:46,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:41:46,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074563382] [2022-04-07 00:41:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:46,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:41:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:41:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:41:46,689 INFO L87 Difference]: Start difference. First operand 792 states and 1105 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:41:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:48,036 INFO L93 Difference]: Finished difference Result 1090 states and 1555 transitions. [2022-04-07 00:41:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:41:48,036 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 [2022-04-07 00:41:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:48,042 INFO L225 Difference]: With dead ends: 1090 [2022-04-07 00:41:48,042 INFO L226 Difference]: Without dead ends: 1074 [2022-04-07 00:41:48,046 INFO L912 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 [2022-04-07 00:41:48,047 INFO L913 BasicCegarLoop]: 799 mSDtfsCounter, 890 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:48,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1338 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:41:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-04-07 00:41:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 848. [2022-04-07 00:41:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 663 states have (on average 1.3725490196078431) internal successors, (910), 677 states have internal predecessors, (910), 112 states have call successors, (112), 51 states have call predecessors, (112), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-04-07 00:41:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1165 transitions. [2022-04-07 00:41:48,327 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1165 transitions. Word has length 50 [2022-04-07 00:41:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:48,327 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 1165 transitions. [2022-04-07 00:41:48,327 INFO L479 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) [2022-04-07 00:41:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1165 transitions. [2022-04-07 00:41:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:41:48,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:48,329 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:48,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-07 00:41:48,329 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 1 times [2022-04-07 00:41:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:48,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119204307] [2022-04-07 00:41:48,330 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 2 times [2022-04-07 00:41:48,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:48,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770929356] [2022-04-07 00:41:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:41:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:48,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:48,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770929356] [2022-04-07 00:41:48,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770929356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:48,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:48,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:48,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:48,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119204307] [2022-04-07 00:41:48,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119204307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:48,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:48,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:48,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060272764] [2022-04-07 00:41:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:48,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:41:48,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:41:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:41:48,517 INFO L87 Difference]: Start difference. First operand 848 states and 1165 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:41:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:49,762 INFO L93 Difference]: Finished difference Result 996 states and 1410 transitions. [2022-04-07 00:41:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:41:49,767 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 [2022-04-07 00:41:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:49,770 INFO L225 Difference]: With dead ends: 996 [2022-04-07 00:41:49,770 INFO L226 Difference]: Without dead ends: 991 [2022-04-07 00:41:49,771 INFO L912 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 [2022-04-07 00:41:49,771 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1190 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:49,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1168 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:41:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-04-07 00:41:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 867. [2022-04-07 00:41:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 679 states have (on average 1.369661266568483) internal successors, (930), 694 states have internal predecessors, (930), 113 states have call successors, (113), 52 states have call predecessors, (113), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-04-07 00:41:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1188 transitions. [2022-04-07 00:41:49,960 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1188 transitions. Word has length 52 [2022-04-07 00:41:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:49,961 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1188 transitions. [2022-04-07 00:41:49,961 INFO L479 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) [2022-04-07 00:41:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1188 transitions. [2022-04-07 00:41:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:41:49,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:49,962 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:49,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-07 00:41:49,962 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 1 times [2022-04-07 00:41:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118452483] [2022-04-07 00:41:49,963 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 2 times [2022-04-07 00:41:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137813027] [2022-04-07 00:41:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:41:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-07 00:41:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:50,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137813027] [2022-04-07 00:41:50,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137813027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:50,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:50,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:41:50,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118452483] [2022-04-07 00:41:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118452483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:50,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:41:50,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353032811] [2022-04-07 00:41:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:50,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:41:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:41:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:41:50,079 INFO L87 Difference]: Start difference. First operand 867 states and 1188 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:41:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:51,778 INFO L93 Difference]: Finished difference Result 1203 states and 1692 transitions. [2022-04-07 00:41:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:41:51,778 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 [2022-04-07 00:41:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:51,781 INFO L225 Difference]: With dead ends: 1203 [2022-04-07 00:41:51,781 INFO L226 Difference]: Without dead ends: 956 [2022-04-07 00:41:51,783 INFO L912 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 [2022-04-07 00:41:51,784 INFO L913 BasicCegarLoop]: 641 mSDtfsCounter, 700 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:51,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1175 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:41:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-04-07 00:41:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 836. [2022-04-07 00:41:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 655 states have (on average 1.369465648854962) internal successors, (897), 668 states have internal predecessors, (897), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-04-07 00:41:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1148 transitions. [2022-04-07 00:41:51,924 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1148 transitions. Word has length 54 [2022-04-07 00:41:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:51,924 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1148 transitions. [2022-04-07 00:41:51,924 INFO L479 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) [2022-04-07 00:41:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1148 transitions. [2022-04-07 00:41:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-07 00:41:51,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:51,926 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:51,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-07 00:41:51,926 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 1 times [2022-04-07 00:41:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:51,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075651351] [2022-04-07 00:41:51,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 2 times [2022-04-07 00:41:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:51,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803282954] [2022-04-07 00:41:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:51,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:52,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:52,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:52,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803282954] [2022-04-07 00:41:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803282954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:52,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:52,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:52,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:52,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075651351] [2022-04-07 00:41:52,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075651351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:52,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:52,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462954104] [2022-04-07 00:41:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:52,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:41:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:41:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:41:52,071 INFO L87 Difference]: Start difference. First operand 836 states and 1148 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:41:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:53,894 INFO L93 Difference]: Finished difference Result 971 states and 1378 transitions. [2022-04-07 00:41:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:41:53,895 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 [2022-04-07 00:41:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:53,898 INFO L225 Difference]: With dead ends: 971 [2022-04-07 00:41:53,898 INFO L226 Difference]: Without dead ends: 967 [2022-04-07 00:41:53,899 INFO L912 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 [2022-04-07 00:41:53,899 INFO L913 BasicCegarLoop]: 706 mSDtfsCounter, 735 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:53,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2358 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-07 00:41:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-04-07 00:41:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 843. [2022-04-07 00:41:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 661 states have (on average 1.367624810892587) internal successors, (904), 675 states have internal predecessors, (904), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-07 00:41:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1157 transitions. [2022-04-07 00:41:54,055 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1157 transitions. Word has length 51 [2022-04-07 00:41:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:54,055 INFO L478 AbstractCegarLoop]: Abstraction has 843 states and 1157 transitions. [2022-04-07 00:41:54,055 INFO L479 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) [2022-04-07 00:41:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1157 transitions. [2022-04-07 00:41:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-07 00:41:54,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:54,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:54,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-07 00:41:54,057 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 1 times [2022-04-07 00:41:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038547208] [2022-04-07 00:41:54,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 2 times [2022-04-07 00:41:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238697873] [2022-04-07 00:41:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:54,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238697873] [2022-04-07 00:41:54,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238697873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:54,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:54,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:54,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038547208] [2022-04-07 00:41:54,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038547208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:54,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:54,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:41:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259160809] [2022-04-07 00:41:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:54,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:41:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:41:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:41:54,309 INFO L87 Difference]: Start difference. First operand 843 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:41:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:56,722 INFO L93 Difference]: Finished difference Result 986 states and 1394 transitions. [2022-04-07 00:41:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:41:56,723 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 [2022-04-07 00:41:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:56,727 INFO L225 Difference]: With dead ends: 986 [2022-04-07 00:41:56,727 INFO L226 Difference]: Without dead ends: 962 [2022-04-07 00:41:56,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:41:56,729 INFO L913 BasicCegarLoop]: 708 mSDtfsCounter, 737 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 3844 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:56,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2456 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3844 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:41:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-04-07 00:41:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 842. [2022-04-07 00:41:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3666666666666667) internal successors, (902), 674 states have internal predecessors, (902), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-07 00:41:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1155 transitions. [2022-04-07 00:41:56,929 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1155 transitions. Word has length 51 [2022-04-07 00:41:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:56,929 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1155 transitions. [2022-04-07 00:41:56,929 INFO L479 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) [2022-04-07 00:41:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1155 transitions. [2022-04-07 00:41:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-07 00:41:56,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:56,947 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:56,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-07 00:41:56,948 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 1 times [2022-04-07 00:41:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046711356] [2022-04-07 00:41:56,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 2 times [2022-04-07 00:41:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217309912] [2022-04-07 00:41:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:41:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:57,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217309912] [2022-04-07 00:41:57,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217309912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:57,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:57,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:41:57,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046711356] [2022-04-07 00:41:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046711356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:57,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:57,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:41:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900507531] [2022-04-07 00:41:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:57,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:41:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:41:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:41:57,263 INFO L87 Difference]: Start difference. First operand 842 states and 1155 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:41:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:41:58,908 INFO L93 Difference]: Finished difference Result 974 states and 1378 transitions. [2022-04-07 00:41:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:41:58,908 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 [2022-04-07 00:41:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:41:58,911 INFO L225 Difference]: With dead ends: 974 [2022-04-07 00:41:58,911 INFO L226 Difference]: Without dead ends: 968 [2022-04-07 00:41:58,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:41:58,912 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 2613 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:41:58,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 1383 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:41:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-04-07 00:41:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 842. [2022-04-07 00:41:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3651515151515152) internal successors, (901), 674 states have internal predecessors, (901), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-07 00:41:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1154 transitions. [2022-04-07 00:41:59,109 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1154 transitions. Word has length 53 [2022-04-07 00:41:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:41:59,110 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1154 transitions. [2022-04-07 00:41:59,110 INFO L479 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) [2022-04-07 00:41:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1154 transitions. [2022-04-07 00:41:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:41:59,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:41:59,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:41:59,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-07 00:41:59,112 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:41:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:41:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 1 times [2022-04-07 00:41:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:59,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636386007] [2022-04-07 00:41:59,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:41:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 2 times [2022-04-07 00:41:59,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:41:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766487550] [2022-04-07 00:41:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:41:59,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:41:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:41:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:41:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:41:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:41:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:41:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:41:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:41:59,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:41:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766487550] [2022-04-07 00:41:59,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766487550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:59,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:59,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:59,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:41:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636386007] [2022-04-07 00:41:59,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636386007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:41:59,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:41:59,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:41:59,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376950707] [2022-04-07 00:41:59,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:41:59,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:41:59,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:41:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:41:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:41:59,254 INFO L87 Difference]: Start difference. First operand 842 states and 1154 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:42:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:01,232 INFO L93 Difference]: Finished difference Result 979 states and 1383 transitions. [2022-04-07 00:42:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:42:01,232 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 [2022-04-07 00:42:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:01,237 INFO L225 Difference]: With dead ends: 979 [2022-04-07 00:42:01,237 INFO L226 Difference]: Without dead ends: 943 [2022-04-07 00:42:01,237 INFO L912 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 [2022-04-07 00:42:01,239 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 1565 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:01,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1284 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-07 00:42:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-04-07 00:42:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 815. [2022-04-07 00:42:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3746081504702194) internal successors, (877), 651 states have internal predecessors, (877), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-04-07 00:42:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1124 transitions. [2022-04-07 00:42:01,499 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1124 transitions. Word has length 52 [2022-04-07 00:42:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:01,500 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1124 transitions. [2022-04-07 00:42:01,500 INFO L479 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) [2022-04-07 00:42:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1124 transitions. [2022-04-07 00:42:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:42:01,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:01,517 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:01,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-07 00:42:01,517 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 1 times [2022-04-07 00:42:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368836527] [2022-04-07 00:42:01,518 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 2 times [2022-04-07 00:42:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:01,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994422731] [2022-04-07 00:42:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994422731] [2022-04-07 00:42:01,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994422731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:01,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:01,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:42:01,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368836527] [2022-04-07 00:42:01,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368836527] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:01,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:01,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:42:01,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550489233] [2022-04-07 00:42:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:01,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:42:01,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:42:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:42:01,806 INFO L87 Difference]: Start difference. First operand 815 states and 1124 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:42:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:04,152 INFO L93 Difference]: Finished difference Result 945 states and 1345 transitions. [2022-04-07 00:42:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:42:04,152 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 [2022-04-07 00:42:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:04,176 INFO L225 Difference]: With dead ends: 945 [2022-04-07 00:42:04,176 INFO L226 Difference]: Without dead ends: 939 [2022-04-07 00:42:04,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:42:04,177 INFO L913 BasicCegarLoop]: 630 mSDtfsCounter, 2544 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:04,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 1558 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-07 00:42:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-04-07 00:42:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 815. [2022-04-07 00:42:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3730407523510972) internal successors, (876), 651 states have internal predecessors, (876), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-04-07 00:42:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1123 transitions. [2022-04-07 00:42:04,385 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1123 transitions. Word has length 54 [2022-04-07 00:42:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:04,385 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1123 transitions. [2022-04-07 00:42:04,385 INFO L479 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) [2022-04-07 00:42:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1123 transitions. [2022-04-07 00:42:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:42:04,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:04,386 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:04,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-07 00:42:04,386 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 1 times [2022-04-07 00:42:04,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:04,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184324649] [2022-04-07 00:42:04,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 2 times [2022-04-07 00:42:04,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:04,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698519384] [2022-04-07 00:42:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:04,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698519384] [2022-04-07 00:42:04,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698519384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:04,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:04,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:04,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:04,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184324649] [2022-04-07 00:42:04,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184324649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:04,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:04,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41228834] [2022-04-07 00:42:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:04,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:42:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:42:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:42:04,612 INFO L87 Difference]: Start difference. First operand 815 states and 1123 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:42:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:07,183 INFO L93 Difference]: Finished difference Result 966 states and 1372 transitions. [2022-04-07 00:42:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:42:07,187 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 [2022-04-07 00:42:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:07,212 INFO L225 Difference]: With dead ends: 966 [2022-04-07 00:42:07,213 INFO L226 Difference]: Without dead ends: 926 [2022-04-07 00:42:07,213 INFO L912 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 [2022-04-07 00:42:07,214 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1069 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 4890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:07,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2475 Invalid, 4890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-07 00:42:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-04-07 00:42:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 806. [2022-04-07 00:42:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 631 states have (on average 1.3565768621236134) internal successors, (856), 644 states have internal predecessors, (856), 107 states have call successors, (107), 49 states have call predecessors, (107), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-04-07 00:42:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1099 transitions. [2022-04-07 00:42:07,422 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1099 transitions. Word has length 55 [2022-04-07 00:42:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:07,422 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1099 transitions. [2022-04-07 00:42:07,422 INFO L479 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) [2022-04-07 00:42:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1099 transitions. [2022-04-07 00:42:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-07 00:42:07,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:07,433 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:07,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-07 00:42:07,433 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 1 times [2022-04-07 00:42:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334496343] [2022-04-07 00:42:07,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 2 times [2022-04-07 00:42:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342590174] [2022-04-07 00:42:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:42:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:07,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342590174] [2022-04-07 00:42:07,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342590174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:07,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:07,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:07,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334496343] [2022-04-07 00:42:07,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334496343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:07,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:07,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164073203] [2022-04-07 00:42:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:07,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:42:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:42:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:42:07,744 INFO L87 Difference]: Start difference. First operand 806 states and 1099 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:42:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:10,539 INFO L93 Difference]: Finished difference Result 942 states and 1326 transitions. [2022-04-07 00:42:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:42:10,540 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 [2022-04-07 00:42:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:10,543 INFO L225 Difference]: With dead ends: 942 [2022-04-07 00:42:10,543 INFO L226 Difference]: Without dead ends: 924 [2022-04-07 00:42:10,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:10,544 INFO L913 BasicCegarLoop]: 660 mSDtfsCounter, 978 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:10,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2682 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-07 00:42:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-04-07 00:42:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 804. [2022-04-07 00:42:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 630 states have (on average 1.3555555555555556) internal successors, (854), 643 states have internal predecessors, (854), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-04-07 00:42:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1095 transitions. [2022-04-07 00:42:10,781 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1095 transitions. Word has length 56 [2022-04-07 00:42:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:10,781 INFO L478 AbstractCegarLoop]: Abstraction has 804 states and 1095 transitions. [2022-04-07 00:42:10,782 INFO L479 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) [2022-04-07 00:42:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1095 transitions. [2022-04-07 00:42:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:42:10,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:10,784 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:10,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-07 00:42:10,784 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 1 times [2022-04-07 00:42:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:10,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111193163] [2022-04-07 00:42:10,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 2 times [2022-04-07 00:42:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000896295] [2022-04-07 00:42:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:10,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:10,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:42:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:10,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:11,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:11,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:11,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000896295] [2022-04-07 00:42:11,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000896295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:11,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:11,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:11,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:11,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111193163] [2022-04-07 00:42:11,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111193163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:11,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:11,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:42:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417834316] [2022-04-07 00:42:11,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:11,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:42:11,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:42:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:42:11,027 INFO L87 Difference]: Start difference. First operand 804 states and 1095 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:42:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:13,470 INFO L93 Difference]: Finished difference Result 937 states and 1319 transitions. [2022-04-07 00:42:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:42:13,470 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 [2022-04-07 00:42:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:13,473 INFO L225 Difference]: With dead ends: 937 [2022-04-07 00:42:13,473 INFO L226 Difference]: Without dead ends: 919 [2022-04-07 00:42:13,475 INFO L912 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 [2022-04-07 00:42:13,476 INFO L913 BasicCegarLoop]: 657 mSDtfsCounter, 682 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:13,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2653 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:42:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-04-07 00:42:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 799. [2022-04-07 00:42:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.3556618819776713) internal successors, (850), 640 states have internal predecessors, (850), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-04-07 00:42:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1088 transitions. [2022-04-07 00:42:13,685 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1088 transitions. Word has length 55 [2022-04-07 00:42:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:13,685 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1088 transitions. [2022-04-07 00:42:13,686 INFO L479 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) [2022-04-07 00:42:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1088 transitions. [2022-04-07 00:42:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-07 00:42:13,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:13,687 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:13,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-07 00:42:13,687 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 1 times [2022-04-07 00:42:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:13,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685106039] [2022-04-07 00:42:13,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 2 times [2022-04-07 00:42:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:13,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365761037] [2022-04-07 00:42:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:42:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:42:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:13,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365761037] [2022-04-07 00:42:13,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365761037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:13,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:42:13,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:13,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685106039] [2022-04-07 00:42:13,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685106039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:13,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:13,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:42:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119024962] [2022-04-07 00:42:13,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:13,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:42:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:42:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:42:13,907 INFO L87 Difference]: Start difference. First operand 799 states and 1088 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:42:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:15,582 INFO L93 Difference]: Finished difference Result 984 states and 1370 transitions. [2022-04-07 00:42:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:42:15,583 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 [2022-04-07 00:42:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:15,588 INFO L225 Difference]: With dead ends: 984 [2022-04-07 00:42:15,607 INFO L226 Difference]: Without dead ends: 941 [2022-04-07 00:42:15,608 INFO L912 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 [2022-04-07 00:42:15,608 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:15,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1190 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:42:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-04-07 00:42:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 799. [2022-04-07 00:42:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.354066985645933) internal successors, (849), 640 states have internal predecessors, (849), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-04-07 00:42:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1087 transitions. [2022-04-07 00:42:15,797 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1087 transitions. Word has length 56 [2022-04-07 00:42:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:15,797 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1087 transitions. [2022-04-07 00:42:15,798 INFO L479 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) [2022-04-07 00:42:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1087 transitions. [2022-04-07 00:42:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-07 00:42:15,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:15,800 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:15,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-07 00:42:15,800 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 1 times [2022-04-07 00:42:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2004534065] [2022-04-07 00:42:15,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 2 times [2022-04-07 00:42:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561559315] [2022-04-07 00:42:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-07 00:42:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-07 00:42:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:42:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:15,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561559315] [2022-04-07 00:42:15,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561559315] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:42:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122816832] [2022-04-07 00:42:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:42:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:42:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:42:16,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:42:16,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:42:16,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:42:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:42:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-07 00:42:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:42:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:16,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:42:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122816832] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:42:17,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:42:17,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 15 [2022-04-07 00:42:17,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2004534065] [2022-04-07 00:42:17,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2004534065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:17,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:17,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:42:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300666321] [2022-04-07 00:42:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:17,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:42:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:42:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:42:17,109 INFO L87 Difference]: Start difference. First operand 799 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:42:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:18,042 INFO L93 Difference]: Finished difference Result 1117 states and 1518 transitions. [2022-04-07 00:42:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:42:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-04-07 00:42:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:18,053 INFO L225 Difference]: With dead ends: 1117 [2022-04-07 00:42:18,053 INFO L226 Difference]: Without dead ends: 953 [2022-04-07 00:42:18,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:18,054 INFO L913 BasicCegarLoop]: 693 mSDtfsCounter, 870 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:18,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1140 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:42:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-04-07 00:42:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 837. [2022-04-07 00:42:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 658 states have (on average 1.3541033434650456) internal successors, (891), 671 states have internal predecessors, (891), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-04-07 00:42:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1142 transitions. [2022-04-07 00:42:18,354 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1142 transitions. Word has length 74 [2022-04-07 00:42:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:18,355 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1142 transitions. [2022-04-07 00:42:18,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:42:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1142 transitions. [2022-04-07 00:42:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-07 00:42:18,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:18,371 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:18,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:42:18,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-07 00:42:18,589 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 1 times [2022-04-07 00:42:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [886308051] [2022-04-07 00:42:18,589 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 2 times [2022-04-07 00:42:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654850684] [2022-04-07 00:42:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:18,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:18,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:19,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654850684] [2022-04-07 00:42:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654850684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:19,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:19,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:19,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [886308051] [2022-04-07 00:42:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [886308051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006098031] [2022-04-07 00:42:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:19,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-07 00:42:19,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-07 00:42:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:42:19,089 INFO L87 Difference]: Start difference. First operand 837 states and 1142 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) [2022-04-07 00:42:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:22,110 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2022-04-07 00:42:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:42:22,110 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 [2022-04-07 00:42:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:22,118 INFO L225 Difference]: With dead ends: 984 [2022-04-07 00:42:22,119 INFO L226 Difference]: Without dead ends: 958 [2022-04-07 00:42:22,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-04-07 00:42:22,120 INFO L913 BasicCegarLoop]: 636 mSDtfsCounter, 2002 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 5902 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 6727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 5902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:22,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 3173 Invalid, 6727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 5902 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-07 00:42:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-04-07 00:42:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 836. [2022-04-07 00:42:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 657 states have (on average 1.339421613394216) internal successors, (880), 670 states have internal predecessors, (880), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-04-07 00:42:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1131 transitions. [2022-04-07 00:42:22,404 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1131 transitions. Word has length 59 [2022-04-07 00:42:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:22,404 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1131 transitions. [2022-04-07 00:42:22,404 INFO L479 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) [2022-04-07 00:42:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1131 transitions. [2022-04-07 00:42:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-07 00:42:22,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:22,405 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:22,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-07 00:42:22,406 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 1 times [2022-04-07 00:42:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031346630] [2022-04-07 00:42:22,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 2 times [2022-04-07 00:42:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838510764] [2022-04-07 00:42:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:22,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838510764] [2022-04-07 00:42:22,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838510764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:22,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:22,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:22,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031346630] [2022-04-07 00:42:22,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031346630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:22,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:22,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:22,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836855237] [2022-04-07 00:42:22,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:22,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:42:22,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:42:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:22,687 INFO L87 Difference]: Start difference. First operand 836 states and 1131 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) [2022-04-07 00:42:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:25,384 INFO L93 Difference]: Finished difference Result 973 states and 1356 transitions. [2022-04-07 00:42:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:42:25,385 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 [2022-04-07 00:42:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:25,393 INFO L225 Difference]: With dead ends: 973 [2022-04-07 00:42:25,393 INFO L226 Difference]: Without dead ends: 953 [2022-04-07 00:42:25,393 INFO L912 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 [2022-04-07 00:42:25,394 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 941 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 5479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:25,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 2903 Invalid, 5479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5082 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-07 00:42:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-04-07 00:42:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-04-07 00:42:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 655 states have (on average 1.3389312977099237) internal successors, (877), 668 states have internal predecessors, (877), 107 states have call successors, (107), 51 states have call predecessors, (107), 70 states have return successors, (142), 120 states have call predecessors, (142), 100 states have call successors, (142) [2022-04-07 00:42:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1126 transitions. [2022-04-07 00:42:25,625 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1126 transitions. Word has length 58 [2022-04-07 00:42:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:25,626 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1126 transitions. [2022-04-07 00:42:25,626 INFO L479 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) [2022-04-07 00:42:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1126 transitions. [2022-04-07 00:42:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-07 00:42:25,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:25,627 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:25,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-07 00:42:25,627 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 1 times [2022-04-07 00:42:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893781410] [2022-04-07 00:42:25,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 2 times [2022-04-07 00:42:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339403810] [2022-04-07 00:42:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:42:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339403810] [2022-04-07 00:42:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339403810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:25,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:25,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:25,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893781410] [2022-04-07 00:42:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893781410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:25,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:25,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:25,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690816499] [2022-04-07 00:42:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:25,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:42:25,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:42:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:25,882 INFO L87 Difference]: Start difference. First operand 833 states and 1126 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) [2022-04-07 00:42:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:28,495 INFO L93 Difference]: Finished difference Result 1006 states and 1388 transitions. [2022-04-07 00:42:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:42:28,496 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 [2022-04-07 00:42:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:28,500 INFO L225 Difference]: With dead ends: 1006 [2022-04-07 00:42:28,500 INFO L226 Difference]: Without dead ends: 938 [2022-04-07 00:42:28,516 INFO L912 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 [2022-04-07 00:42:28,517 INFO L913 BasicCegarLoop]: 628 mSDtfsCounter, 673 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 4402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:28,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 2419 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 4402 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:42:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-04-07 00:42:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 821. [2022-04-07 00:42:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 646 states have (on average 1.3343653250773995) internal successors, (862), 659 states have internal predecessors, (862), 104 states have call successors, (104), 51 states have call predecessors, (104), 70 states have return successors, (139), 117 states have call predecessors, (139), 97 states have call successors, (139) [2022-04-07 00:42:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1105 transitions. [2022-04-07 00:42:28,731 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1105 transitions. Word has length 59 [2022-04-07 00:42:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:28,731 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1105 transitions. [2022-04-07 00:42:28,731 INFO L479 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) [2022-04-07 00:42:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1105 transitions. [2022-04-07 00:42:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:42:28,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:28,732 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:28,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-07 00:42:28,733 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 1 times [2022-04-07 00:42:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274507906] [2022-04-07 00:42:28,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 2 times [2022-04-07 00:42:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481174741] [2022-04-07 00:42:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:28,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:42:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481174741] [2022-04-07 00:42:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481174741] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:28,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:42:28,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274507906] [2022-04-07 00:42:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274507906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:28,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:42:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547902690] [2022-04-07 00:42:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:28,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:42:28,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:42:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:42:28,933 INFO L87 Difference]: Start difference. First operand 821 states and 1105 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) [2022-04-07 00:42:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:30,698 INFO L93 Difference]: Finished difference Result 1102 states and 1563 transitions. [2022-04-07 00:42:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:42:30,699 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 [2022-04-07 00:42:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:30,702 INFO L225 Difference]: With dead ends: 1102 [2022-04-07 00:42:30,702 INFO L226 Difference]: Without dead ends: 991 [2022-04-07 00:42:30,702 INFO L912 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 [2022-04-07 00:42:30,703 INFO L913 BasicCegarLoop]: 608 mSDtfsCounter, 400 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:30,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1570 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:42:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-04-07 00:42:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 828. [2022-04-07 00:42:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 651 states have (on average 1.3348694316436251) internal successors, (869), 665 states have internal predecessors, (869), 105 states have call successors, (105), 51 states have call predecessors, (105), 71 states have return successors, (147), 118 states have call predecessors, (147), 98 states have call successors, (147) [2022-04-07 00:42:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1121 transitions. [2022-04-07 00:42:30,933 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1121 transitions. Word has length 60 [2022-04-07 00:42:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:30,933 INFO L478 AbstractCegarLoop]: Abstraction has 828 states and 1121 transitions. [2022-04-07 00:42:30,933 INFO L479 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) [2022-04-07 00:42:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1121 transitions. [2022-04-07 00:42:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:42:30,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:30,934 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:30,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-07 00:42:30,934 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 1 times [2022-04-07 00:42:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104478632] [2022-04-07 00:42:30,935 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 2 times [2022-04-07 00:42:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540461922] [2022-04-07 00:42:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:30,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:42:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:31,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540461922] [2022-04-07 00:42:31,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540461922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:31,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:31,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:31,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104478632] [2022-04-07 00:42:31,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104478632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:31,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:31,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777660145] [2022-04-07 00:42:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:31,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:42:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:42:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:31,133 INFO L87 Difference]: Start difference. First operand 828 states and 1121 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) [2022-04-07 00:42:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:33,223 INFO L93 Difference]: Finished difference Result 971 states and 1360 transitions. [2022-04-07 00:42:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:42:33,224 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 [2022-04-07 00:42:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:33,226 INFO L225 Difference]: With dead ends: 971 [2022-04-07 00:42:33,226 INFO L226 Difference]: Without dead ends: 946 [2022-04-07 00:42:33,227 INFO L912 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 [2022-04-07 00:42:33,228 INFO L913 BasicCegarLoop]: 633 mSDtfsCounter, 1274 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3599 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 3599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:33,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 2477 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 3599 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-07 00:42:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-04-07 00:42:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 826. [2022-04-07 00:42:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.333846153846154) internal successors, (867), 664 states have internal predecessors, (867), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-04-07 00:42:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1117 transitions. [2022-04-07 00:42:33,447 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1117 transitions. Word has length 60 [2022-04-07 00:42:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:33,447 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1117 transitions. [2022-04-07 00:42:33,450 INFO L479 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) [2022-04-07 00:42:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1117 transitions. [2022-04-07 00:42:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:42:33,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:33,451 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:33,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-07 00:42:33,452 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 1 times [2022-04-07 00:42:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485900216] [2022-04-07 00:42:33,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 2 times [2022-04-07 00:42:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406434751] [2022-04-07 00:42:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:42:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406434751] [2022-04-07 00:42:33,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406434751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:33,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:42:33,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:33,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485900216] [2022-04-07 00:42:33,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485900216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:33,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:42:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949552563] [2022-04-07 00:42:33,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:33,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:42:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:42:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:42:33,699 INFO L87 Difference]: Start difference. First operand 826 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:42:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:35,445 INFO L93 Difference]: Finished difference Result 980 states and 1364 transitions. [2022-04-07 00:42:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:42:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-04-07 00:42:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:35,452 INFO L225 Difference]: With dead ends: 980 [2022-04-07 00:42:35,452 INFO L226 Difference]: Without dead ends: 948 [2022-04-07 00:42:35,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:42:35,453 INFO L913 BasicCegarLoop]: 612 mSDtfsCounter, 645 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:35,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1756 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:42:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-04-07 00:42:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 826. [2022-04-07 00:42:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.3323076923076924) internal successors, (866), 664 states have internal predecessors, (866), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-04-07 00:42:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1116 transitions. [2022-04-07 00:42:35,706 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1116 transitions. Word has length 60 [2022-04-07 00:42:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:35,707 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1116 transitions. [2022-04-07 00:42:35,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:42:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1116 transitions. [2022-04-07 00:42:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:42:35,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:35,708 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:35,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-07 00:42:35,708 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 1 times [2022-04-07 00:42:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:35,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [154642944] [2022-04-07 00:42:35,711 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:35,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 2 times [2022-04-07 00:42:35,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:35,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429077430] [2022-04-07 00:42:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:35,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:42:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:35,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:35,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429077430] [2022-04-07 00:42:35,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429077430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:35,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:35,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:35,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:35,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [154642944] [2022-04-07 00:42:35,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [154642944] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:35,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:35,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:42:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397133115] [2022-04-07 00:42:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:35,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:42:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:35,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:42:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:42:35,992 INFO L87 Difference]: Start difference. First operand 826 states and 1116 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) [2022-04-07 00:42:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:38,667 INFO L93 Difference]: Finished difference Result 987 states and 1381 transitions. [2022-04-07 00:42:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:42:38,667 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 [2022-04-07 00:42:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:38,670 INFO L225 Difference]: With dead ends: 987 [2022-04-07 00:42:38,670 INFO L226 Difference]: Without dead ends: 935 [2022-04-07 00:42:38,670 INFO L912 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 [2022-04-07 00:42:38,672 INFO L913 BasicCegarLoop]: 627 mSDtfsCounter, 971 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 4522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:38,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 2659 Invalid, 4522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:42:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-04-07 00:42:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 818. [2022-04-07 00:42:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 658 states have internal predecessors, (855), 102 states have call successors, (102), 51 states have call predecessors, (102), 71 states have return successors, (144), 115 states have call predecessors, (144), 95 states have call successors, (144) [2022-04-07 00:42:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1101 transitions. [2022-04-07 00:42:38,995 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1101 transitions. Word has length 60 [2022-04-07 00:42:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:38,995 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1101 transitions. [2022-04-07 00:42:38,995 INFO L479 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) [2022-04-07 00:42:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1101 transitions. [2022-04-07 00:42:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:42:38,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:38,997 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:38,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-07 00:42:38,997 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 1 times [2022-04-07 00:42:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:38,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744409759] [2022-04-07 00:42:38,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 2 times [2022-04-07 00:42:38,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:38,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948167714] [2022-04-07 00:42:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:42:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948167714] [2022-04-07 00:42:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948167714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:39,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:42:39,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744409759] [2022-04-07 00:42:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744409759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:39,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:42:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128028854] [2022-04-07 00:42:39,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:39,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:42:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:42:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:42:39,213 INFO L87 Difference]: Start difference. First operand 818 states and 1101 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) [2022-04-07 00:42:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:40,709 INFO L93 Difference]: Finished difference Result 983 states and 1382 transitions. [2022-04-07 00:42:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:42:40,710 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 [2022-04-07 00:42:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:40,713 INFO L225 Difference]: With dead ends: 983 [2022-04-07 00:42:40,713 INFO L226 Difference]: Without dead ends: 949 [2022-04-07 00:42:40,713 INFO L912 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 [2022-04-07 00:42:40,714 INFO L913 BasicCegarLoop]: 593 mSDtfsCounter, 654 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:40,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1481 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:42:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-04-07 00:42:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 822. [2022-04-07 00:42:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 646 states have (on average 1.326625386996904) internal successors, (857), 662 states have internal predecessors, (857), 102 states have call successors, (102), 51 states have call predecessors, (102), 73 states have return successors, (160), 115 states have call predecessors, (160), 95 states have call successors, (160) [2022-04-07 00:42:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1119 transitions. [2022-04-07 00:42:40,937 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1119 transitions. Word has length 61 [2022-04-07 00:42:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:40,937 INFO L478 AbstractCegarLoop]: Abstraction has 822 states and 1119 transitions. [2022-04-07 00:42:40,937 INFO L479 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) [2022-04-07 00:42:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1119 transitions. [2022-04-07 00:42:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:42:40,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:40,938 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:40,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-07 00:42:40,939 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 1 times [2022-04-07 00:42:40,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:40,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054406221] [2022-04-07 00:42:40,939 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 2 times [2022-04-07 00:42:40,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:40,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522363567] [2022-04-07 00:42:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:40,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:42:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522363567] [2022-04-07 00:42:41,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522363567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:41,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:41,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:41,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054406221] [2022-04-07 00:42:41,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054406221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:41,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:41,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925453488] [2022-04-07 00:42:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:41,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-07 00:42:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-07 00:42:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:42:41,261 INFO L87 Difference]: Start difference. First operand 822 states and 1119 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) [2022-04-07 00:42:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:44,348 INFO L93 Difference]: Finished difference Result 961 states and 1352 transitions. [2022-04-07 00:42:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:42:44,349 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 [2022-04-07 00:42:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:44,351 INFO L225 Difference]: With dead ends: 961 [2022-04-07 00:42:44,351 INFO L226 Difference]: Without dead ends: 937 [2022-04-07 00:42:44,360 INFO L912 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 [2022-04-07 00:42:44,361 INFO L913 BasicCegarLoop]: 592 mSDtfsCounter, 1489 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 5392 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 6008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:44,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 3154 Invalid, 6008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 5392 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-07 00:42:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-04-07 00:42:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2022-04-07 00:42:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 661 states have internal predecessors, (855), 101 states have call successors, (101), 51 states have call predecessors, (101), 73 states have return successors, (159), 114 states have call predecessors, (159), 94 states have call successors, (159) [2022-04-07 00:42:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1115 transitions. [2022-04-07 00:42:44,594 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1115 transitions. Word has length 63 [2022-04-07 00:42:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:44,594 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1115 transitions. [2022-04-07 00:42:44,594 INFO L479 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) [2022-04-07 00:42:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1115 transitions. [2022-04-07 00:42:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-07 00:42:44,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:44,596 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:44,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-07 00:42:44,596 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 1 times [2022-04-07 00:42:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082253091] [2022-04-07 00:42:44,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 2 times [2022-04-07 00:42:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684112410] [2022-04-07 00:42:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:42:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:44,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684112410] [2022-04-07 00:42:44,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684112410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:44,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:42:44,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082253091] [2022-04-07 00:42:44,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082253091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:44,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:42:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300804868] [2022-04-07 00:42:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:44,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:42:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:42:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:42:44,969 INFO L87 Difference]: Start difference. First operand 820 states and 1115 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) [2022-04-07 00:42:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:48,014 INFO L93 Difference]: Finished difference Result 961 states and 1350 transitions. [2022-04-07 00:42:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:42:48,015 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 [2022-04-07 00:42:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:48,019 INFO L225 Difference]: With dead ends: 961 [2022-04-07 00:42:48,019 INFO L226 Difference]: Without dead ends: 936 [2022-04-07 00:42:48,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:42:48,035 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 1517 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 5495 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 6121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 5495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:48,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 3383 Invalid, 6121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 5495 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-07 00:42:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-04-07 00:42:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 818. [2022-04-07 00:42:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3245341614906831) internal successors, (853), 660 states have internal predecessors, (853), 100 states have call successors, (100), 51 states have call predecessors, (100), 73 states have return successors, (158), 113 states have call predecessors, (158), 93 states have call successors, (158) [2022-04-07 00:42:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1111 transitions. [2022-04-07 00:42:48,308 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1111 transitions. Word has length 66 [2022-04-07 00:42:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:48,309 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1111 transitions. [2022-04-07 00:42:48,309 INFO L479 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) [2022-04-07 00:42:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1111 transitions. [2022-04-07 00:42:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-07 00:42:48,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:48,310 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:48,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-07 00:42:48,310 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 1 times [2022-04-07 00:42:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:48,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733878394] [2022-04-07 00:42:48,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 2 times [2022-04-07 00:42:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:48,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910395626] [2022-04-07 00:42:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-07 00:42:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910395626] [2022-04-07 00:42:48,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910395626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:48,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:48,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:48,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733878394] [2022-04-07 00:42:48,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733878394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:48,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:48,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:42:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938999] [2022-04-07 00:42:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:48,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-07 00:42:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-07 00:42:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:42:48,591 INFO L87 Difference]: Start difference. First operand 818 states and 1111 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) [2022-04-07 00:42:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:51,733 INFO L93 Difference]: Finished difference Result 958 states and 1343 transitions. [2022-04-07 00:42:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:42:51,734 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 [2022-04-07 00:42:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:51,736 INFO L225 Difference]: With dead ends: 958 [2022-04-07 00:42:51,736 INFO L226 Difference]: Without dead ends: 934 [2022-04-07 00:42:51,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-04-07 00:42:51,737 INFO L913 BasicCegarLoop]: 567 mSDtfsCounter, 1189 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 5649 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 5649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:51,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 2936 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 5649 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-07 00:42:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-07 00:42:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 816. [2022-04-07 00:42:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 643 states have (on average 1.32348367029549) internal successors, (851), 659 states have internal predecessors, (851), 99 states have call successors, (99), 51 states have call predecessors, (99), 73 states have return successors, (157), 112 states have call predecessors, (157), 92 states have call successors, (157) [2022-04-07 00:42:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1107 transitions. [2022-04-07 00:42:51,965 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1107 transitions. Word has length 62 [2022-04-07 00:42:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:51,966 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1107 transitions. [2022-04-07 00:42:51,966 INFO L479 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) [2022-04-07 00:42:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1107 transitions. [2022-04-07 00:42:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-07 00:42:51,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:51,967 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:51,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-07 00:42:51,967 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 1 times [2022-04-07 00:42:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062514188] [2022-04-07 00:42:51,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 2 times [2022-04-07 00:42:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412895646] [2022-04-07 00:42:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:52,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:52,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412895646] [2022-04-07 00:42:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412895646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:42:52,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:52,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062514188] [2022-04-07 00:42:52,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062514188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:52,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:52,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:42:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084633260] [2022-04-07 00:42:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:52,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:42:52,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:42:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:42:52,253 INFO L87 Difference]: Start difference. First operand 816 states and 1107 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) [2022-04-07 00:42:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:54,333 INFO L93 Difference]: Finished difference Result 949 states and 1332 transitions. [2022-04-07 00:42:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:42:54,334 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 [2022-04-07 00:42:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:54,345 INFO L225 Difference]: With dead ends: 949 [2022-04-07 00:42:54,345 INFO L226 Difference]: Without dead ends: 927 [2022-04-07 00:42:54,345 INFO L912 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 [2022-04-07 00:42:54,346 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 600 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 5198 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 5198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:54,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 3046 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 5198 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-07 00:42:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-04-07 00:42:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 811. [2022-04-07 00:42:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 640 states have (on average 1.3234375) internal successors, (847), 656 states have internal predecessors, (847), 98 states have call successors, (98), 51 states have call predecessors, (98), 72 states have return successors, (155), 110 states have call predecessors, (155), 91 states have call successors, (155) [2022-04-07 00:42:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1100 transitions. [2022-04-07 00:42:54,625 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1100 transitions. Word has length 62 [2022-04-07 00:42:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:54,625 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1100 transitions. [2022-04-07 00:42:54,625 INFO L479 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) [2022-04-07 00:42:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1100 transitions. [2022-04-07 00:42:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:42:54,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:54,627 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:54,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-07 00:42:54,627 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 1 times [2022-04-07 00:42:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:54,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15906176] [2022-04-07 00:42:54,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 2 times [2022-04-07 00:42:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254039043] [2022-04-07 00:42:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:42:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:54,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254039043] [2022-04-07 00:42:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254039043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:54,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:42:54,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15906176] [2022-04-07 00:42:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15906176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:54,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:42:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677879055] [2022-04-07 00:42:54,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:54,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:42:54,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:42:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:42:54,788 INFO L87 Difference]: Start difference. First operand 811 states and 1100 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) [2022-04-07 00:42:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:55,844 INFO L93 Difference]: Finished difference Result 1144 states and 1570 transitions. [2022-04-07 00:42:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:42:55,845 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 [2022-04-07 00:42:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:55,847 INFO L225 Difference]: With dead ends: 1144 [2022-04-07 00:42:55,847 INFO L226 Difference]: Without dead ends: 812 [2022-04-07 00:42:55,848 INFO L912 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 [2022-04-07 00:42:55,848 INFO L913 BasicCegarLoop]: 523 mSDtfsCounter, 909 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:55,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 884 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:42:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-04-07 00:42:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 703. [2022-04-07 00:42:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 555 states have (on average 1.3099099099099099) internal successors, (727), 571 states have internal predecessors, (727), 85 states have call successors, (85), 45 states have call predecessors, (85), 62 states have return successors, (109), 93 states have call predecessors, (109), 78 states have call successors, (109) [2022-04-07 00:42:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 921 transitions. [2022-04-07 00:42:56,057 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 921 transitions. Word has length 63 [2022-04-07 00:42:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:56,057 INFO L478 AbstractCegarLoop]: Abstraction has 703 states and 921 transitions. [2022-04-07 00:42:56,057 INFO L479 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) [2022-04-07 00:42:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 921 transitions. [2022-04-07 00:42:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-07 00:42:56,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:56,059 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:56,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-07 00:42:56,059 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 1 times [2022-04-07 00:42:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600267281] [2022-04-07 00:42:56,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 2 times [2022-04-07 00:42:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919959135] [2022-04-07 00:42:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:42:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:42:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:42:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:42:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:56,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:56,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919959135] [2022-04-07 00:42:56,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919959135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:56,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:56,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:42:56,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:56,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600267281] [2022-04-07 00:42:56,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600267281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:56,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:56,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:42:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041038224] [2022-04-07 00:42:56,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:56,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:42:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:42:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:42:56,579 INFO L87 Difference]: Start difference. First operand 703 states and 921 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) [2022-04-07 00:42:58,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:42:58,899 INFO L93 Difference]: Finished difference Result 780 states and 1034 transitions. [2022-04-07 00:42:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:42:58,899 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 [2022-04-07 00:42:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:42:58,901 INFO L225 Difference]: With dead ends: 780 [2022-04-07 00:42:58,901 INFO L226 Difference]: Without dead ends: 758 [2022-04-07 00:42:58,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:42:58,903 INFO L913 BasicCegarLoop]: 525 mSDtfsCounter, 841 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 5817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:42:58,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2683 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-07 00:42:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-04-07 00:42:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 698. [2022-04-07 00:42:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.309782608695652) internal successors, (723), 568 states have internal predecessors, (723), 84 states have call successors, (84), 45 states have call predecessors, (84), 61 states have return successors, (107), 91 states have call predecessors, (107), 77 states have call successors, (107) [2022-04-07 00:42:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 914 transitions. [2022-04-07 00:42:59,173 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 914 transitions. Word has length 63 [2022-04-07 00:42:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:42:59,174 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 914 transitions. [2022-04-07 00:42:59,174 INFO L479 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) [2022-04-07 00:42:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 914 transitions. [2022-04-07 00:42:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-07 00:42:59,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:42:59,175 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:42:59,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-07 00:42:59,176 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:42:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:42:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 1 times [2022-04-07 00:42:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013735963] [2022-04-07 00:42:59,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:42:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 2 times [2022-04-07 00:42:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:42:59,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232837877] [2022-04-07 00:42:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:42:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:42:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:42:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:42:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:42:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:42:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:42:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:42:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-07 00:42:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:42:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:42:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:42:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232837877] [2022-04-07 00:42:59,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232837877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:42:59,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:42:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013735963] [2022-04-07 00:42:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013735963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:42:59,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:42:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:42:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066403502] [2022-04-07 00:42:59,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:42:59,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:42:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:42:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:42:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:42:59,300 INFO L87 Difference]: Start difference. First operand 698 states and 914 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:43:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:00,624 INFO L93 Difference]: Finished difference Result 971 states and 1279 transitions. [2022-04-07 00:43:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:43:00,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-07 00:43:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:00,627 INFO L225 Difference]: With dead ends: 971 [2022-04-07 00:43:00,627 INFO L226 Difference]: Without dead ends: 834 [2022-04-07 00:43:00,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:00,627 INFO L913 BasicCegarLoop]: 536 mSDtfsCounter, 844 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:00,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1065 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:43:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-07 00:43:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 717. [2022-04-07 00:43:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.3015873015873016) internal successors, (738), 582 states have internal predecessors, (738), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-04-07 00:43:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 928 transitions. [2022-04-07 00:43:00,858 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 928 transitions. Word has length 67 [2022-04-07 00:43:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:00,859 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 928 transitions. [2022-04-07 00:43:00,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:43:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 928 transitions. [2022-04-07 00:43:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-07 00:43:00,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:00,861 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:00,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-07 00:43:00,861 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 1 times [2022-04-07 00:43:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:00,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828840947] [2022-04-07 00:43:00,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 2 times [2022-04-07 00:43:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:00,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927044428] [2022-04-07 00:43:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:00,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-07 00:43:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:43:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:01,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:43:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:43:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:43:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927044428] [2022-04-07 00:43:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927044428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:01,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:01,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:43:01,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828840947] [2022-04-07 00:43:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828840947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:01,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:01,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:43:01,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486162456] [2022-04-07 00:43:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:01,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:43:01,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:43:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:43:01,035 INFO L87 Difference]: Start difference. First operand 717 states and 928 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) [2022-04-07 00:43:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:02,430 INFO L93 Difference]: Finished difference Result 908 states and 1199 transitions. [2022-04-07 00:43:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:43:02,431 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 [2022-04-07 00:43:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:02,433 INFO L225 Difference]: With dead ends: 908 [2022-04-07 00:43:02,433 INFO L226 Difference]: Without dead ends: 788 [2022-04-07 00:43:02,434 INFO L912 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 [2022-04-07 00:43:02,434 INFO L913 BasicCegarLoop]: 481 mSDtfsCounter, 416 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:02,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 934 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:43:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-04-07 00:43:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 717. [2022-04-07 00:43:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.2962962962962963) internal successors, (735), 582 states have internal predecessors, (735), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-04-07 00:43:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 925 transitions. [2022-04-07 00:43:02,705 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 925 transitions. Word has length 66 [2022-04-07 00:43:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:02,705 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 925 transitions. [2022-04-07 00:43:02,705 INFO L479 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) [2022-04-07 00:43:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 925 transitions. [2022-04-07 00:43:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-07 00:43:02,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:02,706 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:02,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-07 00:43:02,706 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 1 times [2022-04-07 00:43:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357507434] [2022-04-07 00:43:02,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 2 times [2022-04-07 00:43:02,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:02,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121454508] [2022-04-07 00:43:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:02,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:43:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-07 00:43:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121454508] [2022-04-07 00:43:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121454508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:02,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:02,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:02,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357507434] [2022-04-07 00:43:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357507434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:02,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:02,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740755335] [2022-04-07 00:43:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:02,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:02,921 INFO L87 Difference]: Start difference. First operand 717 states and 925 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) [2022-04-07 00:43:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:04,604 INFO L93 Difference]: Finished difference Result 852 states and 1114 transitions. [2022-04-07 00:43:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:43:04,604 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 [2022-04-07 00:43:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:04,608 INFO L225 Difference]: With dead ends: 852 [2022-04-07 00:43:04,608 INFO L226 Difference]: Without dead ends: 819 [2022-04-07 00:43:04,609 INFO L912 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 [2022-04-07 00:43:04,609 INFO L913 BasicCegarLoop]: 502 mSDtfsCounter, 1601 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:04,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 1355 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:43:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-07 00:43:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 723. [2022-04-07 00:43:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2954545454545454) internal successors, (741), 587 states have internal predecessors, (741), 85 states have call successors, (85), 48 states have call predecessors, (85), 65 states have return successors, (107), 94 states have call predecessors, (107), 79 states have call successors, (107) [2022-04-07 00:43:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 933 transitions. [2022-04-07 00:43:04,862 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 933 transitions. Word has length 65 [2022-04-07 00:43:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:04,864 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 933 transitions. [2022-04-07 00:43:04,864 INFO L479 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) [2022-04-07 00:43:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 933 transitions. [2022-04-07 00:43:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-07 00:43:04,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:04,865 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:04,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-07 00:43:04,865 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:04,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 1 times [2022-04-07 00:43:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:04,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1962814731] [2022-04-07 00:43:04,866 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 2 times [2022-04-07 00:43:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:04,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652995039] [2022-04-07 00:43:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:04,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:43:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652995039] [2022-04-07 00:43:05,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652995039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:05,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:05,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:05,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:05,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1962814731] [2022-04-07 00:43:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1962814731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:05,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:05,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:05,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903322738] [2022-04-07 00:43:05,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:05,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:43:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:43:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:43:05,257 INFO L87 Difference]: Start difference. First operand 723 states and 933 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) [2022-04-07 00:43:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:07,652 INFO L93 Difference]: Finished difference Result 816 states and 1069 transitions. [2022-04-07 00:43:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:43:07,653 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 [2022-04-07 00:43:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:07,658 INFO L225 Difference]: With dead ends: 816 [2022-04-07 00:43:07,658 INFO L226 Difference]: Without dead ends: 791 [2022-04-07 00:43:07,658 INFO L912 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 [2022-04-07 00:43:07,659 INFO L913 BasicCegarLoop]: 516 mSDtfsCounter, 1701 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 5323 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 5968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 5323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:07,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 2871 Invalid, 5968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5323 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-07 00:43:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-07 00:43:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 721. [2022-04-07 00:43:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2942206654991244) internal successors, (739), 586 states have internal predecessors, (739), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-04-07 00:43:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 929 transitions. [2022-04-07 00:43:07,893 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 929 transitions. Word has length 67 [2022-04-07 00:43:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:07,894 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 929 transitions. [2022-04-07 00:43:07,894 INFO L479 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) [2022-04-07 00:43:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 929 transitions. [2022-04-07 00:43:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-07 00:43:07,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:07,895 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:07,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-07 00:43:07,895 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 1 times [2022-04-07 00:43:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775763980] [2022-04-07 00:43:07,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 2 times [2022-04-07 00:43:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504203551] [2022-04-07 00:43:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:07,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:08,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:43:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504203551] [2022-04-07 00:43:08,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504203551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:08,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:08,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:08,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:08,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775763980] [2022-04-07 00:43:08,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775763980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:08,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:08,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40235384] [2022-04-07 00:43:08,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:08,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:08,102 INFO L87 Difference]: Start difference. First operand 721 states and 929 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) [2022-04-07 00:43:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:09,763 INFO L93 Difference]: Finished difference Result 847 states and 1100 transitions. [2022-04-07 00:43:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:43:09,763 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 [2022-04-07 00:43:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:09,787 INFO L225 Difference]: With dead ends: 847 [2022-04-07 00:43:09,788 INFO L226 Difference]: Without dead ends: 793 [2022-04-07 00:43:09,788 INFO L912 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 [2022-04-07 00:43:09,790 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 591 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:09,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1527 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:43:09,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-04-07 00:43:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 721. [2022-04-07 00:43:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2907180385288968) internal successors, (737), 586 states have internal predecessors, (737), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-04-07 00:43:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 927 transitions. [2022-04-07 00:43:10,232 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 927 transitions. Word has length 66 [2022-04-07 00:43:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:10,232 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 927 transitions. [2022-04-07 00:43:10,232 INFO L479 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) [2022-04-07 00:43:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 927 transitions. [2022-04-07 00:43:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-07 00:43:10,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:10,234 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:10,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-07 00:43:10,234 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 1 times [2022-04-07 00:43:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258231838] [2022-04-07 00:43:10,235 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 2 times [2022-04-07 00:43:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047365774] [2022-04-07 00:43:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:10,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:43:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047365774] [2022-04-07 00:43:10,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047365774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:10,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:10,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:43:10,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258231838] [2022-04-07 00:43:10,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258231838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:10,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:10,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:43:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649144601] [2022-04-07 00:43:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:10,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:43:10,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:43:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:43:10,509 INFO L87 Difference]: Start difference. First operand 721 states and 927 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) [2022-04-07 00:43:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:12,554 INFO L93 Difference]: Finished difference Result 818 states and 1067 transitions. [2022-04-07 00:43:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:43:12,555 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 [2022-04-07 00:43:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:12,556 INFO L225 Difference]: With dead ends: 818 [2022-04-07 00:43:12,556 INFO L226 Difference]: Without dead ends: 741 [2022-04-07 00:43:12,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:43:12,557 INFO L913 BasicCegarLoop]: 508 mSDtfsCounter, 922 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 3398 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 3398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:12,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1875 Invalid, 3746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3398 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-07 00:43:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-04-07 00:43:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 684. [2022-04-07 00:43:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 541 states have (on average 1.277264325323475) internal successors, (691), 556 states have internal predecessors, (691), 77 states have call successors, (77), 48 states have call predecessors, (77), 65 states have return successors, (98), 86 states have call predecessors, (98), 71 states have call successors, (98) [2022-04-07 00:43:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 866 transitions. [2022-04-07 00:43:12,758 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 866 transitions. Word has length 66 [2022-04-07 00:43:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:12,758 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 866 transitions. [2022-04-07 00:43:12,758 INFO L479 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) [2022-04-07 00:43:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 866 transitions. [2022-04-07 00:43:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-07 00:43:12,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:12,760 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:12,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-07 00:43:12,760 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 1 times [2022-04-07 00:43:12,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:12,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [542971606] [2022-04-07 00:43:12,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 2 times [2022-04-07 00:43:12,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:12,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282884369] [2022-04-07 00:43:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:12,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-07 00:43:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282884369] [2022-04-07 00:43:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282884369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:12,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:12,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:12,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [542971606] [2022-04-07 00:43:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [542971606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:12,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:12,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905991204] [2022-04-07 00:43:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:12,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:12,998 INFO L87 Difference]: Start difference. First operand 684 states and 866 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) [2022-04-07 00:43:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:14,569 INFO L93 Difference]: Finished difference Result 769 states and 981 transitions. [2022-04-07 00:43:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:43:14,569 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 [2022-04-07 00:43:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:14,571 INFO L225 Difference]: With dead ends: 769 [2022-04-07 00:43:14,571 INFO L226 Difference]: Without dead ends: 730 [2022-04-07 00:43:14,571 INFO L912 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 [2022-04-07 00:43:14,572 INFO L913 BasicCegarLoop]: 451 mSDtfsCounter, 523 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:14,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1210 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:43:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-04-07 00:43:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 679. [2022-04-07 00:43:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 537 states have (on average 1.277467411545624) internal successors, (686), 552 states have internal predecessors, (686), 76 states have call successors, (76), 48 states have call predecessors, (76), 65 states have return successors, (97), 85 states have call predecessors, (97), 70 states have call successors, (97) [2022-04-07 00:43:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 859 transitions. [2022-04-07 00:43:14,851 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 859 transitions. Word has length 67 [2022-04-07 00:43:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:14,852 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 859 transitions. [2022-04-07 00:43:14,852 INFO L479 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) [2022-04-07 00:43:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 859 transitions. [2022-04-07 00:43:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-07 00:43:14,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:14,853 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:14,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-07 00:43:14,853 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 1 times [2022-04-07 00:43:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:14,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954165237] [2022-04-07 00:43:14,867 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 2 times [2022-04-07 00:43:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:14,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204860076] [2022-04-07 00:43:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:14,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:15,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:15,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204860076] [2022-04-07 00:43:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204860076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:15,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:15,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:43:15,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954165237] [2022-04-07 00:43:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954165237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:15,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:15,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:43:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270359710] [2022-04-07 00:43:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:15,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:43:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:43:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:43:15,014 INFO L87 Difference]: Start difference. First operand 679 states and 859 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) [2022-04-07 00:43:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:16,280 INFO L93 Difference]: Finished difference Result 848 states and 1087 transitions. [2022-04-07 00:43:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:43:16,280 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 [2022-04-07 00:43:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:16,282 INFO L225 Difference]: With dead ends: 848 [2022-04-07 00:43:16,282 INFO L226 Difference]: Without dead ends: 836 [2022-04-07 00:43:16,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:16,282 INFO L913 BasicCegarLoop]: 470 mSDtfsCounter, 712 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:16,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 950 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:43:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-04-07 00:43:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 725. [2022-04-07 00:43:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2705061082024434) internal successors, (728), 590 states have internal predecessors, (728), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-04-07 00:43:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 911 transitions. [2022-04-07 00:43:16,535 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 911 transitions. Word has length 67 [2022-04-07 00:43:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:16,536 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 911 transitions. [2022-04-07 00:43:16,536 INFO L479 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) [2022-04-07 00:43:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 911 transitions. [2022-04-07 00:43:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:43:16,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:16,537 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:16,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-07 00:43:16,537 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 1 times [2022-04-07 00:43:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821599761] [2022-04-07 00:43:16,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 2 times [2022-04-07 00:43:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413107499] [2022-04-07 00:43:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:16,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:16,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413107499] [2022-04-07 00:43:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413107499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:16,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:16,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:16,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821599761] [2022-04-07 00:43:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821599761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:16,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:16,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358231741] [2022-04-07 00:43:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:16,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:16,708 INFO L87 Difference]: Start difference. First operand 725 states and 911 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) [2022-04-07 00:43:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:18,637 INFO L93 Difference]: Finished difference Result 842 states and 1076 transitions. [2022-04-07 00:43:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:43:18,637 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 [2022-04-07 00:43:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:18,639 INFO L225 Difference]: With dead ends: 842 [2022-04-07 00:43:18,639 INFO L226 Difference]: Without dead ends: 833 [2022-04-07 00:43:18,640 INFO L912 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 [2022-04-07 00:43:18,640 INFO L913 BasicCegarLoop]: 472 mSDtfsCounter, 1726 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:18,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1046 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:43:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-04-07 00:43:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 725. [2022-04-07 00:43:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2670157068062826) internal successors, (726), 590 states have internal predecessors, (726), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-04-07 00:43:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 909 transitions. [2022-04-07 00:43:18,897 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 909 transitions. Word has length 68 [2022-04-07 00:43:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:18,897 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 909 transitions. [2022-04-07 00:43:18,897 INFO L479 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) [2022-04-07 00:43:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 909 transitions. [2022-04-07 00:43:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-07 00:43:18,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:18,912 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:18,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-07 00:43:18,914 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 1 times [2022-04-07 00:43:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2125774170] [2022-04-07 00:43:18,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 2 times [2022-04-07 00:43:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728093135] [2022-04-07 00:43:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:18,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:43:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-07 00:43:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728093135] [2022-04-07 00:43:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728093135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:19,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:19,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2125774170] [2022-04-07 00:43:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2125774170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:19,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021201044] [2022-04-07 00:43:19,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:19,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:43:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:43:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:43:19,255 INFO L87 Difference]: Start difference. First operand 725 states and 909 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) [2022-04-07 00:43:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:22,197 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2022-04-07 00:43:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:43:22,198 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 [2022-04-07 00:43:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:22,199 INFO L225 Difference]: With dead ends: 816 [2022-04-07 00:43:22,199 INFO L226 Difference]: Without dead ends: 791 [2022-04-07 00:43:22,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:43:22,200 INFO L913 BasicCegarLoop]: 458 mSDtfsCounter, 787 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 4942 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 5243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:22,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2724 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4942 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-07 00:43:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-07 00:43:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 723. [2022-04-07 00:43:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2657342657342658) internal successors, (724), 589 states have internal predecessors, (724), 77 states have call successors, (77), 50 states have call predecessors, (77), 73 states have return successors, (104), 92 states have call predecessors, (104), 71 states have call successors, (104) [2022-04-07 00:43:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 905 transitions. [2022-04-07 00:43:22,673 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 905 transitions. Word has length 74 [2022-04-07 00:43:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:22,673 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 905 transitions. [2022-04-07 00:43:22,674 INFO L479 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) [2022-04-07 00:43:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 905 transitions. [2022-04-07 00:43:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-07 00:43:22,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:22,676 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:22,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-07 00:43:22,676 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 1 times [2022-04-07 00:43:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679034100] [2022-04-07 00:43:22,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 2 times [2022-04-07 00:43:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751239208] [2022-04-07 00:43:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:22,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:22,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:23,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:43:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-07 00:43:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751239208] [2022-04-07 00:43:23,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751239208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:23,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:23,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-07 00:43:23,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679034100] [2022-04-07 00:43:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679034100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:23,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:23,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-07 00:43:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31916233] [2022-04-07 00:43:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:23,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-07 00:43:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-07 00:43:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:43:23,204 INFO L87 Difference]: Start difference. First operand 723 states and 905 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) [2022-04-07 00:43:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:25,862 INFO L93 Difference]: Finished difference Result 797 states and 1008 transitions. [2022-04-07 00:43:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-07 00:43:25,863 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 [2022-04-07 00:43:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:25,865 INFO L225 Difference]: With dead ends: 797 [2022-04-07 00:43:25,865 INFO L226 Difference]: Without dead ends: 770 [2022-04-07 00:43:25,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-04-07 00:43:25,866 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1479 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 4839 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 5399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 4839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:25,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 2695 Invalid, 5399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 4839 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-07 00:43:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-07 00:43:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 720. [2022-04-07 00:43:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 570 states have (on average 1.2649122807017543) internal successors, (721), 587 states have internal predecessors, (721), 76 states have call successors, (76), 50 states have call predecessors, (76), 73 states have return successors, (103), 91 states have call predecessors, (103), 70 states have call successors, (103) [2022-04-07 00:43:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 900 transitions. [2022-04-07 00:43:26,141 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 900 transitions. Word has length 70 [2022-04-07 00:43:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:26,142 INFO L478 AbstractCegarLoop]: Abstraction has 720 states and 900 transitions. [2022-04-07 00:43:26,142 INFO L479 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) [2022-04-07 00:43:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 900 transitions. [2022-04-07 00:43:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-07 00:43:26,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:26,144 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:26,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-04-07 00:43:26,144 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 1 times [2022-04-07 00:43:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603424157] [2022-04-07 00:43:26,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 2 times [2022-04-07 00:43:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747361516] [2022-04-07 00:43:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:43:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:26,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747361516] [2022-04-07 00:43:26,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747361516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:26,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:26,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:26,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603424157] [2022-04-07 00:43:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603424157] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:26,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:26,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795268576] [2022-04-07 00:43:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:26,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:43:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:43:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:43:26,572 INFO L87 Difference]: Start difference. First operand 720 states and 900 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) [2022-04-07 00:43:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:29,002 INFO L93 Difference]: Finished difference Result 790 states and 998 transitions. [2022-04-07 00:43:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:43:29,002 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 [2022-04-07 00:43:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:29,004 INFO L225 Difference]: With dead ends: 790 [2022-04-07 00:43:29,004 INFO L226 Difference]: Without dead ends: 768 [2022-04-07 00:43:29,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:43:29,008 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 467 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 4408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:29,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2339 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:43:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-04-07 00:43:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2022-04-07 00:43:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 569 states have (on average 1.2636203866432338) internal successors, (719), 586 states have internal predecessors, (719), 75 states have call successors, (75), 50 states have call predecessors, (75), 73 states have return successors, (102), 90 states have call predecessors, (102), 69 states have call successors, (102) [2022-04-07 00:43:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2022-04-07 00:43:29,271 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 72 [2022-04-07 00:43:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:29,271 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2022-04-07 00:43:29,271 INFO L479 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) [2022-04-07 00:43:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2022-04-07 00:43:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:29,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:29,272 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:29,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-04-07 00:43:29,272 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 1 times [2022-04-07 00:43:29,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:29,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1186060398] [2022-04-07 00:43:29,273 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 2 times [2022-04-07 00:43:29,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:29,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303878688] [2022-04-07 00:43:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:43:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303878688] [2022-04-07 00:43:29,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303878688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:29,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:29,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1186060398] [2022-04-07 00:43:29,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1186060398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:29,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534279121] [2022-04-07 00:43:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:29,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:43:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:43:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:43:29,574 INFO L87 Difference]: Start difference. First operand 718 states and 896 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) [2022-04-07 00:43:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:31,773 INFO L93 Difference]: Finished difference Result 785 states and 991 transitions. [2022-04-07 00:43:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:43:31,773 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 [2022-04-07 00:43:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:31,775 INFO L225 Difference]: With dead ends: 785 [2022-04-07 00:43:31,775 INFO L226 Difference]: Without dead ends: 754 [2022-04-07 00:43:31,775 INFO L912 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 [2022-04-07 00:43:31,776 INFO L913 BasicCegarLoop]: 440 mSDtfsCounter, 239 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 4537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:31,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2240 Invalid, 4537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-07 00:43:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-04-07 00:43:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 706. [2022-04-07 00:43:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 560 states have (on average 1.2642857142857142) internal successors, (708), 577 states have internal predecessors, (708), 73 states have call successors, (73), 50 states have call predecessors, (73), 72 states have return successors, (99), 87 states have call predecessors, (99), 67 states have call successors, (99) [2022-04-07 00:43:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 880 transitions. [2022-04-07 00:43:31,992 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 880 transitions. Word has length 69 [2022-04-07 00:43:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:32,007 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 880 transitions. [2022-04-07 00:43:32,007 INFO L479 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) [2022-04-07 00:43:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 880 transitions. [2022-04-07 00:43:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:32,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:32,009 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:32,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-04-07 00:43:32,009 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 1 times [2022-04-07 00:43:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:32,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735234202] [2022-04-07 00:43:32,009 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 2 times [2022-04-07 00:43:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549262135] [2022-04-07 00:43:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:43:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:43:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:32,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549262135] [2022-04-07 00:43:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549262135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:32,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:32,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:32,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735234202] [2022-04-07 00:43:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735234202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:32,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:32,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53326684] [2022-04-07 00:43:32,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:32,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:32,237 INFO L87 Difference]: Start difference. First operand 706 states and 880 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) [2022-04-07 00:43:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:33,601 INFO L93 Difference]: Finished difference Result 788 states and 988 transitions. [2022-04-07 00:43:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:43:33,602 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 [2022-04-07 00:43:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:33,619 INFO L225 Difference]: With dead ends: 788 [2022-04-07 00:43:33,619 INFO L226 Difference]: Without dead ends: 749 [2022-04-07 00:43:33,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:43:33,620 INFO L913 BasicCegarLoop]: 420 mSDtfsCounter, 491 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:33,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1071 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:43:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-04-07 00:43:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 701. [2022-04-07 00:43:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 556 states have (on average 1.264388489208633) internal successors, (703), 573 states have internal predecessors, (703), 72 states have call successors, (72), 50 states have call predecessors, (72), 72 states have return successors, (98), 86 states have call predecessors, (98), 66 states have call successors, (98) [2022-04-07 00:43:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 873 transitions. [2022-04-07 00:43:33,921 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 873 transitions. Word has length 69 [2022-04-07 00:43:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:33,921 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 873 transitions. [2022-04-07 00:43:33,921 INFO L479 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) [2022-04-07 00:43:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 873 transitions. [2022-04-07 00:43:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:33,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:33,923 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:33,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-04-07 00:43:33,923 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 1 times [2022-04-07 00:43:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:33,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428515013] [2022-04-07 00:43:33,923 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 2 times [2022-04-07 00:43:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:33,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023341773] [2022-04-07 00:43:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:43:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:43:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:34,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023341773] [2022-04-07 00:43:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023341773] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:34,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:34,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428515013] [2022-04-07 00:43:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428515013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:34,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:34,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355480460] [2022-04-07 00:43:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:34,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-07 00:43:34,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:34,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-07 00:43:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:43:34,152 INFO L87 Difference]: Start difference. First operand 701 states and 873 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) [2022-04-07 00:43:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:35,934 INFO L93 Difference]: Finished difference Result 776 states and 976 transitions. [2022-04-07 00:43:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:43:35,934 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 [2022-04-07 00:43:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:35,936 INFO L225 Difference]: With dead ends: 776 [2022-04-07 00:43:35,936 INFO L226 Difference]: Without dead ends: 746 [2022-04-07 00:43:35,936 INFO L912 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 [2022-04-07 00:43:35,936 INFO L913 BasicCegarLoop]: 435 mSDtfsCounter, 705 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 3402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 3151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:35,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 2058 Invalid, 3402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3151 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:43:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-04-07 00:43:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 698. [2022-04-07 00:43:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 554 states have (on average 1.263537906137184) internal successors, (700), 571 states have internal predecessors, (700), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-04-07 00:43:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 868 transitions. [2022-04-07 00:43:36,150 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 868 transitions. Word has length 69 [2022-04-07 00:43:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:36,151 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 868 transitions. [2022-04-07 00:43:36,151 INFO L479 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) [2022-04-07 00:43:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 868 transitions. [2022-04-07 00:43:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:36,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:36,152 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:36,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-04-07 00:43:36,152 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 1 times [2022-04-07 00:43:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1582979710] [2022-04-07 00:43:36,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 2 times [2022-04-07 00:43:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:36,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819890854] [2022-04-07 00:43:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819890854] [2022-04-07 00:43:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819890854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:36,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:36,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:36,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1582979710] [2022-04-07 00:43:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1582979710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:36,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:36,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:36,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111256459] [2022-04-07 00:43:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:36,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-07 00:43:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-07 00:43:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:43:36,433 INFO L87 Difference]: Start difference. First operand 698 states and 868 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) [2022-04-07 00:43:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:38,334 INFO L93 Difference]: Finished difference Result 756 states and 950 transitions. [2022-04-07 00:43:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-07 00:43:38,334 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 [2022-04-07 00:43:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:38,336 INFO L225 Difference]: With dead ends: 756 [2022-04-07 00:43:38,336 INFO L226 Difference]: Without dead ends: 750 [2022-04-07 00:43:38,336 INFO L912 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 [2022-04-07 00:43:38,337 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 789 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 4020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:38,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1669 Invalid, 4020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-07 00:43:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-04-07 00:43:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 695. [2022-04-07 00:43:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 551 states have (on average 1.2577132486388385) internal successors, (693), 568 states have internal predecessors, (693), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-04-07 00:43:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 861 transitions. [2022-04-07 00:43:38,559 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 861 transitions. Word has length 69 [2022-04-07 00:43:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:38,560 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 861 transitions. [2022-04-07 00:43:38,560 INFO L479 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) [2022-04-07 00:43:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 861 transitions. [2022-04-07 00:43:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:38,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:38,561 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:38,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-04-07 00:43:38,561 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 1 times [2022-04-07 00:43:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1452186212] [2022-04-07 00:43:38,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 2 times [2022-04-07 00:43:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:38,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868192467] [2022-04-07 00:43:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:38,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868192467] [2022-04-07 00:43:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868192467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:38,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:38,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:38,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1452186212] [2022-04-07 00:43:38,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1452186212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:38,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:38,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:43:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782482431] [2022-04-07 00:43:38,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:38,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:43:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:43:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:43:38,820 INFO L87 Difference]: Start difference. First operand 695 states and 861 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) [2022-04-07 00:43:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:40,332 INFO L93 Difference]: Finished difference Result 805 states and 1014 transitions. [2022-04-07 00:43:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:43:40,332 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 [2022-04-07 00:43:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:40,334 INFO L225 Difference]: With dead ends: 805 [2022-04-07 00:43:40,334 INFO L226 Difference]: Without dead ends: 770 [2022-04-07 00:43:40,334 INFO L912 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 [2022-04-07 00:43:40,335 INFO L913 BasicCegarLoop]: 434 mSDtfsCounter, 1617 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:40,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 925 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:43:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-07 00:43:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 666. [2022-04-07 00:43:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 527 states have (on average 1.256166982922201) internal successors, (662), 543 states have internal predecessors, (662), 70 states have call successors, (70), 49 states have call predecessors, (70), 68 states have return successors, (93), 81 states have call predecessors, (93), 64 states have call successors, (93) [2022-04-07 00:43:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 825 transitions. [2022-04-07 00:43:40,546 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 825 transitions. Word has length 69 [2022-04-07 00:43:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:40,546 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 825 transitions. [2022-04-07 00:43:40,562 INFO L479 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) [2022-04-07 00:43:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 825 transitions. [2022-04-07 00:43:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-07 00:43:40,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:40,584 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:40,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-04-07 00:43:40,584 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 1 times [2022-04-07 00:43:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:40,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050677779] [2022-04-07 00:43:40,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 2 times [2022-04-07 00:43:40,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:40,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217985121] [2022-04-07 00:43:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217985121] [2022-04-07 00:43:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217985121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:40,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:40,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:43:40,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2050677779] [2022-04-07 00:43:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2050677779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:40,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:40,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:43:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648806680] [2022-04-07 00:43:40,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:40,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:43:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:43:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:43:40,770 INFO L87 Difference]: Start difference. First operand 666 states and 825 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:43:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:41,785 INFO L93 Difference]: Finished difference Result 740 states and 928 transitions. [2022-04-07 00:43:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:43:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-04-07 00:43:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:41,787 INFO L225 Difference]: With dead ends: 740 [2022-04-07 00:43:41,787 INFO L226 Difference]: Without dead ends: 700 [2022-04-07 00:43:41,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:41,788 INFO L913 BasicCegarLoop]: 431 mSDtfsCounter, 608 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:41,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 821 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:43:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-04-07 00:43:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-04-07 00:43:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2490272373540856) internal successors, (642), 529 states have internal predecessors, (642), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-04-07 00:43:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 800 transitions. [2022-04-07 00:43:42,027 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 800 transitions. Word has length 69 [2022-04-07 00:43:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:42,027 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 800 transitions. [2022-04-07 00:43:42,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:43:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 800 transitions. [2022-04-07 00:43:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:43:42,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:42,029 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:42,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-04-07 00:43:42,029 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 1 times [2022-04-07 00:43:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616796926] [2022-04-07 00:43:42,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 2 times [2022-04-07 00:43:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796104615] [2022-04-07 00:43:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:43:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-07 00:43:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796104615] [2022-04-07 00:43:42,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796104615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:42,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:42,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:42,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:42,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616796926] [2022-04-07 00:43:42,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616796926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:42,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:42,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013315446] [2022-04-07 00:43:42,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:42,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:43:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:43:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:42,246 INFO L87 Difference]: Start difference. First operand 648 states and 800 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) [2022-04-07 00:43:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:43,468 INFO L93 Difference]: Finished difference Result 738 states and 917 transitions. [2022-04-07 00:43:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:43:43,468 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 [2022-04-07 00:43:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:43,487 INFO L225 Difference]: With dead ends: 738 [2022-04-07 00:43:43,487 INFO L226 Difference]: Without dead ends: 700 [2022-04-07 00:43:43,488 INFO L912 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 [2022-04-07 00:43:43,488 INFO L913 BasicCegarLoop]: 419 mSDtfsCounter, 273 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:43,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1251 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:43:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-04-07 00:43:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-04-07 00:43:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2470817120622568) internal successors, (641), 529 states have internal predecessors, (641), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-04-07 00:43:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 799 transitions. [2022-04-07 00:43:43,803 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 799 transitions. Word has length 71 [2022-04-07 00:43:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:43,803 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 799 transitions. [2022-04-07 00:43:43,803 INFO L479 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) [2022-04-07 00:43:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 799 transitions. [2022-04-07 00:43:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:43:43,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:43,804 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:43,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-04-07 00:43:43,804 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 1 times [2022-04-07 00:43:43,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560745850] [2022-04-07 00:43:43,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 2 times [2022-04-07 00:43:43,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274950708] [2022-04-07 00:43:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:43,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:43,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:43,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:43,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:43:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:44,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-07 00:43:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:44,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274950708] [2022-04-07 00:43:44,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274950708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:44,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:44,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:44,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:44,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560745850] [2022-04-07 00:43:44,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560745850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:44,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:44,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207983764] [2022-04-07 00:43:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:44,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:43:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:43:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:43:44,092 INFO L87 Difference]: Start difference. First operand 648 states and 799 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) [2022-04-07 00:43:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:45,960 INFO L93 Difference]: Finished difference Result 736 states and 923 transitions. [2022-04-07 00:43:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:43:45,960 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 [2022-04-07 00:43:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:45,961 INFO L225 Difference]: With dead ends: 736 [2022-04-07 00:43:45,962 INFO L226 Difference]: Without dead ends: 698 [2022-04-07 00:43:45,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:43:45,962 INFO L913 BasicCegarLoop]: 429 mSDtfsCounter, 936 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 4331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:45,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2451 Invalid, 4331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3986 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:43:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-04-07 00:43:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 643. [2022-04-07 00:43:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 510 states have (on average 1.2431372549019608) internal successors, (634), 525 states have internal predecessors, (634), 68 states have call successors, (68), 48 states have call predecessors, (68), 64 states have return successors, (87), 76 states have call predecessors, (87), 62 states have call successors, (87) [2022-04-07 00:43:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 789 transitions. [2022-04-07 00:43:46,188 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 789 transitions. Word has length 71 [2022-04-07 00:43:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:46,188 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 789 transitions. [2022-04-07 00:43:46,188 INFO L479 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) [2022-04-07 00:43:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 789 transitions. [2022-04-07 00:43:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:43:46,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:46,189 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:46,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-04-07 00:43:46,189 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 1 times [2022-04-07 00:43:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729867338] [2022-04-07 00:43:46,190 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 2 times [2022-04-07 00:43:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368711017] [2022-04-07 00:43:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:43:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-07 00:43:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:46,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:46,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368711017] [2022-04-07 00:43:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368711017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:46,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:46,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:46,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729867338] [2022-04-07 00:43:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729867338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:46,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:46,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120139647] [2022-04-07 00:43:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:46,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:43:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:43:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:46,429 INFO L87 Difference]: Start difference. First operand 643 states and 789 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) [2022-04-07 00:43:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:47,792 INFO L93 Difference]: Finished difference Result 731 states and 903 transitions. [2022-04-07 00:43:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:43:47,792 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 [2022-04-07 00:43:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:47,794 INFO L225 Difference]: With dead ends: 731 [2022-04-07 00:43:47,794 INFO L226 Difference]: Without dead ends: 687 [2022-04-07 00:43:47,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:43:47,794 INFO L913 BasicCegarLoop]: 408 mSDtfsCounter, 451 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:47,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1388 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:43:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-04-07 00:43:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 637. [2022-04-07 00:43:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 505 states have (on average 1.2435643564356436) internal successors, (628), 520 states have internal predecessors, (628), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-04-07 00:43:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 781 transitions. [2022-04-07 00:43:48,003 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 781 transitions. Word has length 71 [2022-04-07 00:43:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:48,003 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 781 transitions. [2022-04-07 00:43:48,003 INFO L479 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) [2022-04-07 00:43:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 781 transitions. [2022-04-07 00:43:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-07 00:43:48,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:48,004 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:48,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-04-07 00:43:48,004 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 1 times [2022-04-07 00:43:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677699253] [2022-04-07 00:43:48,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 2 times [2022-04-07 00:43:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485760843] [2022-04-07 00:43:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485760843] [2022-04-07 00:43:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485760843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:48,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:48,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:48,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677699253] [2022-04-07 00:43:48,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677699253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:48,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:48,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:43:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128660064] [2022-04-07 00:43:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:48,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-07 00:43:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-07 00:43:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:43:48,262 INFO L87 Difference]: Start difference. First operand 637 states and 781 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:43:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:49,896 INFO L93 Difference]: Finished difference Result 868 states and 1068 transitions. [2022-04-07 00:43:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-07 00:43:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-04-07 00:43:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:49,898 INFO L225 Difference]: With dead ends: 868 [2022-04-07 00:43:49,898 INFO L226 Difference]: Without dead ends: 729 [2022-04-07 00:43:49,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:43:49,898 INFO L913 BasicCegarLoop]: 382 mSDtfsCounter, 562 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:49,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1928 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:43:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-04-07 00:43:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 643. [2022-04-07 00:43:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 511 states have (on average 1.2328767123287672) internal successors, (630), 526 states have internal predecessors, (630), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-04-07 00:43:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 783 transitions. [2022-04-07 00:43:50,124 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 783 transitions. Word has length 71 [2022-04-07 00:43:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:50,124 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 783 transitions. [2022-04-07 00:43:50,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:43:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 783 transitions. [2022-04-07 00:43:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:43:50,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:50,125 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:50,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-04-07 00:43:50,125 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 1 times [2022-04-07 00:43:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:50,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617831241] [2022-04-07 00:43:50,126 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 2 times [2022-04-07 00:43:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:50,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091804219] [2022-04-07 00:43:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:43:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:50,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091804219] [2022-04-07 00:43:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091804219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:50,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:50,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:50,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617831241] [2022-04-07 00:43:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617831241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:50,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:43:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43755942] [2022-04-07 00:43:50,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:50,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:43:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:43:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:43:50,318 INFO L87 Difference]: Start difference. First operand 643 states and 783 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) [2022-04-07 00:43:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:51,561 INFO L93 Difference]: Finished difference Result 731 states and 897 transitions. [2022-04-07 00:43:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:43:51,561 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 [2022-04-07 00:43:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:51,562 INFO L225 Difference]: With dead ends: 731 [2022-04-07 00:43:51,563 INFO L226 Difference]: Without dead ends: 681 [2022-04-07 00:43:51,563 INFO L912 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 [2022-04-07 00:43:51,563 INFO L913 BasicCegarLoop]: 399 mSDtfsCounter, 614 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:51,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1229 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:43:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-04-07 00:43:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 631. [2022-04-07 00:43:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 500 states have (on average 1.228) internal successors, (614), 515 states have internal predecessors, (614), 66 states have call successors, (66), 48 states have call predecessors, (66), 64 states have return successors, (85), 74 states have call predecessors, (85), 60 states have call successors, (85) [2022-04-07 00:43:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 765 transitions. [2022-04-07 00:43:51,772 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 765 transitions. Word has length 73 [2022-04-07 00:43:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:51,772 INFO L478 AbstractCegarLoop]: Abstraction has 631 states and 765 transitions. [2022-04-07 00:43:51,772 INFO L479 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) [2022-04-07 00:43:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 765 transitions. [2022-04-07 00:43:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:43:51,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:51,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:51,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-04-07 00:43:51,774 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 1 times [2022-04-07 00:43:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565594319] [2022-04-07 00:43:51,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 2 times [2022-04-07 00:43:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766329382] [2022-04-07 00:43:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:51,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:52,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:43:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766329382] [2022-04-07 00:43:52,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766329382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:52,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:52,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:52,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565594319] [2022-04-07 00:43:52,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565594319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:52,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:52,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:43:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294773420] [2022-04-07 00:43:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:52,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:43:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:43:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:43:52,059 INFO L87 Difference]: Start difference. First operand 631 states and 765 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) [2022-04-07 00:43:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:55,785 INFO L93 Difference]: Finished difference Result 1532 states and 1866 transitions. [2022-04-07 00:43:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-07 00:43:55,791 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 [2022-04-07 00:43:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:55,794 INFO L225 Difference]: With dead ends: 1532 [2022-04-07 00:43:55,794 INFO L226 Difference]: Without dead ends: 1385 [2022-04-07 00:43:55,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=676, Invalid=2630, Unknown=0, NotChecked=0, Total=3306 [2022-04-07 00:43:55,795 INFO L913 BasicCegarLoop]: 418 mSDtfsCounter, 3349 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 4782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:55,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 1381 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-07 00:43:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-04-07 00:43:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1006. [2022-04-07 00:43:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 801 states have (on average 1.2459425717852683) internal successors, (998), 826 states have internal predecessors, (998), 101 states have call successors, (101), 79 states have call predecessors, (101), 103 states have return successors, (136), 107 states have call predecessors, (136), 95 states have call successors, (136) [2022-04-07 00:43:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1235 transitions. [2022-04-07 00:43:56,165 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1235 transitions. Word has length 73 [2022-04-07 00:43:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:56,166 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1235 transitions. [2022-04-07 00:43:56,166 INFO L479 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) [2022-04-07 00:43:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1235 transitions. [2022-04-07 00:43:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:43:56,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:56,167 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:56,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-04-07 00:43:56,167 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 1 times [2022-04-07 00:43:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644750050] [2022-04-07 00:43:56,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 2 times [2022-04-07 00:43:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501989471] [2022-04-07 00:43:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:43:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:43:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:56,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501989471] [2022-04-07 00:43:56,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501989471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:56,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:56,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:43:56,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644750050] [2022-04-07 00:43:56,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644750050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:56,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:56,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:43:56,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470842707] [2022-04-07 00:43:56,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:56,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:43:56,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:43:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:43:56,438 INFO L87 Difference]: Start difference. First operand 1006 states and 1235 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) [2022-04-07 00:43:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:43:58,737 INFO L93 Difference]: Finished difference Result 1405 states and 1720 transitions. [2022-04-07 00:43:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-07 00:43:58,738 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 [2022-04-07 00:43:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:43:58,740 INFO L225 Difference]: With dead ends: 1405 [2022-04-07 00:43:58,740 INFO L226 Difference]: Without dead ends: 1275 [2022-04-07 00:43:58,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:43:58,741 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1989 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:43:58,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1330 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:43:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-04-07 00:43:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1099. [2022-04-07 00:43:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 874 states have (on average 1.2356979405034325) internal successors, (1080), 894 states have internal predecessors, (1080), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-04-07 00:43:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1347 transitions. [2022-04-07 00:43:59,190 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1347 transitions. Word has length 73 [2022-04-07 00:43:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:43:59,190 INFO L478 AbstractCegarLoop]: Abstraction has 1099 states and 1347 transitions. [2022-04-07 00:43:59,190 INFO L479 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) [2022-04-07 00:43:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1347 transitions. [2022-04-07 00:43:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-07 00:43:59,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:43:59,192 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:43:59,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-04-07 00:43:59,192 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:43:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:43:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 1 times [2022-04-07 00:43:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:59,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421490807] [2022-04-07 00:43:59,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:43:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 2 times [2022-04-07 00:43:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:43:59,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180707250] [2022-04-07 00:43:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:43:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:43:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:43:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:43:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:43:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:43:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:43:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:43:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-07 00:43:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:43:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:43:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:43:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:43:59,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180707250] [2022-04-07 00:43:59,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180707250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:59,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:59,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:59,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:43:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421490807] [2022-04-07 00:43:59,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421490807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:43:59,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:43:59,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:43:59,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104300861] [2022-04-07 00:43:59,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:43:59,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:43:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:43:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:43:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:43:59,541 INFO L87 Difference]: Start difference. First operand 1099 states and 1347 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) [2022-04-07 00:44:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:01,822 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2022-04-07 00:44:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:44:01,822 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 [2022-04-07 00:44:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:01,824 INFO L225 Difference]: With dead ends: 1233 [2022-04-07 00:44:01,824 INFO L226 Difference]: Without dead ends: 1191 [2022-04-07 00:44:01,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:44:01,825 INFO L913 BasicCegarLoop]: 397 mSDtfsCounter, 790 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 3515 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 3515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:01,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2284 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 3515 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-07 00:44:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-04-07 00:44:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1095. [2022-04-07 00:44:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 870 states have (on average 1.2344827586206897) internal successors, (1074), 890 states have internal predecessors, (1074), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-04-07 00:44:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1341 transitions. [2022-04-07 00:44:02,245 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1341 transitions. Word has length 77 [2022-04-07 00:44:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:02,245 INFO L478 AbstractCegarLoop]: Abstraction has 1095 states and 1341 transitions. [2022-04-07 00:44:02,245 INFO L479 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) [2022-04-07 00:44:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1341 transitions. [2022-04-07 00:44:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-07 00:44:02,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:02,247 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:02,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-04-07 00:44:02,247 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 1 times [2022-04-07 00:44:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:02,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369364791] [2022-04-07 00:44:02,247 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 2 times [2022-04-07 00:44:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310235533] [2022-04-07 00:44:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:44:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:44:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-07 00:44:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:44:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:02,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310235533] [2022-04-07 00:44:02,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310235533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:02,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:02,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:02,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369364791] [2022-04-07 00:44:02,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369364791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:02,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:02,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710301402] [2022-04-07 00:44:02,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:02,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:44:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:44:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:44:02,425 INFO L87 Difference]: Start difference. First operand 1095 states and 1341 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) [2022-04-07 00:44:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:03,690 INFO L93 Difference]: Finished difference Result 1230 states and 1517 transitions. [2022-04-07 00:44:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:44:03,690 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 [2022-04-07 00:44:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:03,692 INFO L225 Difference]: With dead ends: 1230 [2022-04-07 00:44:03,692 INFO L226 Difference]: Without dead ends: 1131 [2022-04-07 00:44:03,693 INFO L912 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 [2022-04-07 00:44:03,693 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 398 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:03,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 958 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:44:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-04-07 00:44:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1061. [2022-04-07 00:44:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 842 states have (on average 1.2304038004750595) internal successors, (1036), 862 states have internal predecessors, (1036), 109 states have call successors, (109), 83 states have call predecessors, (109), 109 states have return successors, (144), 120 states have call predecessors, (144), 103 states have call successors, (144) [2022-04-07 00:44:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1289 transitions. [2022-04-07 00:44:04,102 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1289 transitions. Word has length 78 [2022-04-07 00:44:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:04,102 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1289 transitions. [2022-04-07 00:44:04,102 INFO L479 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) [2022-04-07 00:44:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1289 transitions. [2022-04-07 00:44:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-07 00:44:04,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:04,104 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:04,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-04-07 00:44:04,104 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 1 times [2022-04-07 00:44:04,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:04,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902192780] [2022-04-07 00:44:04,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 2 times [2022-04-07 00:44:04,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:04,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572176716] [2022-04-07 00:44:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:04,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:44:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:44:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:44:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-07 00:44:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:44:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:04,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:04,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572176716] [2022-04-07 00:44:04,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572176716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:04,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:44:04,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:04,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902192780] [2022-04-07 00:44:04,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902192780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:04,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:44:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208057705] [2022-04-07 00:44:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:04,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:44:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:44:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:44:04,305 INFO L87 Difference]: Start difference. First operand 1061 states and 1289 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) [2022-04-07 00:44:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:05,753 INFO L93 Difference]: Finished difference Result 1156 states and 1411 transitions. [2022-04-07 00:44:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:44:05,753 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 [2022-04-07 00:44:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:05,755 INFO L225 Difference]: With dead ends: 1156 [2022-04-07 00:44:05,755 INFO L226 Difference]: Without dead ends: 1065 [2022-04-07 00:44:05,756 INFO L912 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 [2022-04-07 00:44:05,756 INFO L913 BasicCegarLoop]: 346 mSDtfsCounter, 498 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:05,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1422 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-04-07 00:44:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1013. [2022-04-07 00:44:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 808 states have (on average 1.2326732673267327) internal successors, (996), 828 states have internal predecessors, (996), 99 states have call successors, (99), 79 states have call predecessors, (99), 105 states have return successors, (132), 110 states have call predecessors, (132), 93 states have call successors, (132) [2022-04-07 00:44:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1227 transitions. [2022-04-07 00:44:06,125 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1227 transitions. Word has length 75 [2022-04-07 00:44:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:06,125 INFO L478 AbstractCegarLoop]: Abstraction has 1013 states and 1227 transitions. [2022-04-07 00:44:06,125 INFO L479 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) [2022-04-07 00:44:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1227 transitions. [2022-04-07 00:44:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:44:06,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:06,126 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:06,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-04-07 00:44:06,126 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 1 times [2022-04-07 00:44:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2029081751] [2022-04-07 00:44:06,127 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 2 times [2022-04-07 00:44:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559366905] [2022-04-07 00:44:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-07 00:44:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-07 00:44:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-07 00:44:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:06,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559366905] [2022-04-07 00:44:06,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559366905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:06,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:06,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:06,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2029081751] [2022-04-07 00:44:06,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2029081751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:06,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:06,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571535835] [2022-04-07 00:44:06,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:06,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:06,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:06,327 INFO L87 Difference]: Start difference. First operand 1013 states and 1227 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) [2022-04-07 00:44:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:07,417 INFO L93 Difference]: Finished difference Result 1110 states and 1349 transitions. [2022-04-07 00:44:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:44:07,417 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 [2022-04-07 00:44:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:07,419 INFO L225 Difference]: With dead ends: 1110 [2022-04-07 00:44:07,419 INFO L226 Difference]: Without dead ends: 1049 [2022-04-07 00:44:07,419 INFO L912 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 [2022-04-07 00:44:07,420 INFO L913 BasicCegarLoop]: 331 mSDtfsCounter, 579 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:07,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 1001 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:44:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-04-07 00:44:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 997. [2022-04-07 00:44:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 794 states have (on average 1.2317380352644836) internal successors, (978), 814 states have internal predecessors, (978), 97 states have call successors, (97), 79 states have call predecessors, (97), 105 states have return successors, (128), 108 states have call predecessors, (128), 91 states have call successors, (128) [2022-04-07 00:44:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2022-04-07 00:44:07,759 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 73 [2022-04-07 00:44:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:07,759 INFO L478 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2022-04-07 00:44:07,759 INFO L479 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) [2022-04-07 00:44:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2022-04-07 00:44:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-07 00:44:07,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:07,761 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:07,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-04-07 00:44:07,761 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 1 times [2022-04-07 00:44:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792913542] [2022-04-07 00:44:07,762 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 2 times [2022-04-07 00:44:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408487328] [2022-04-07 00:44:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-07 00:44:07,772 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-07 00:44:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-07 00:44:07,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-07 00:44:07,808 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-07 00:44:07,808 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-07 00:44:07,810 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:44:07,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-04-07 00:44:07,813 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-07 00:44:07,815 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 00:44:07,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 12:44:07 BoogieIcfgContainer [2022-04-07 00:44:07,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 00:44:07,830 INFO L158 Benchmark]: Toolchain (without parser) took 169902.29ms. Allocated memory was 181.4MB in the beginning and 765.5MB in the end (delta: 584.1MB). Free memory was 123.8MB in the beginning and 630.8MB in the end (delta: -507.0MB). Peak memory consumption was 78.7MB. Max. memory is 8.0GB. [2022-04-07 00:44:07,830 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:44:07,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 485.49ms. Allocated memory was 181.4MB in the beginning and 240.1MB in the end (delta: 58.7MB). Free memory was 123.5MB in the beginning and 191.9MB in the end (delta: -68.4MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. [2022-04-07 00:44:07,830 INFO L158 Benchmark]: Boogie Preprocessor took 85.43ms. Allocated memory is still 240.1MB. Free memory was 191.9MB in the beginning and 186.7MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-04-07 00:44:07,831 INFO L158 Benchmark]: RCFGBuilder took 948.94ms. Allocated memory is still 240.1MB. Free memory was 186.7MB in the beginning and 121.1MB in the end (delta: 65.5MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. [2022-04-07 00:44:07,831 INFO L158 Benchmark]: TraceAbstraction took 168366.92ms. Allocated memory was 240.1MB in the beginning and 765.5MB in the end (delta: 525.3MB). Free memory was 120.6MB in the beginning and 630.8MB in the end (delta: -510.2MB). Peak memory consumption was 16.7MB. Max. memory is 8.0GB. [2022-04-07 00:44:07,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 485.49ms. Allocated memory was 181.4MB in the beginning and 240.1MB in the end (delta: 58.7MB). Free memory was 123.5MB in the beginning and 191.9MB in the end (delta: -68.4MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 85.43ms. Allocated memory is still 240.1MB. Free memory was 191.9MB in the beginning and 186.7MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 948.94ms. Allocated memory is still 240.1MB. Free memory was 186.7MB in the beginning and 121.1MB in the end (delta: 65.5MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. * TraceAbstraction took 168366.92ms. Allocated memory was 240.1MB in the beginning and 765.5MB in the end (delta: 525.3MB). Free memory was 120.6MB in the beginning and 630.8MB in the end (delta: -510.2MB). Peak memory consumption was 16.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 59]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int s ; [L33] int UNLOADED ; [L34] int NP ; [L35] int DC ; [L36] int SKIP1 ; [L37] int SKIP2 ; [L38] int MPR1 ; [L39] int MPR3 ; [L40] int IPC ; [L41] int pended ; [L42] int compFptr ; [L43] int compRegistered ; [L44] int lowerDriverReturn ; [L45] int setEventCalled ; [L46] int customIrp ; [L47] int routine ; [L48] int myStatus ; [L49] int pirp ; [L50] int Executive ; [L51] int Suspended ; [L52] int KernelMode ; [L53] int DeviceUsageTypePaging ; [L1718] int pirp__IoStatus__Status ; [L1719] int d = __VERIFIER_nondet_int() ; [L1720] int status = __VERIFIER_nondet_int() ; [L1721] int irp = __VERIFIER_nondet_int() ; [L1722] int we_should_unload = __VERIFIER_nondet_int() ; [L1723] int irp_choice = __VERIFIER_nondet_int() ; [L1724] int devobj = __VERIFIER_nondet_int() ; [L1725] int __cil_tmp9 ; [L1730] s = 0 [L1731] UNLOADED = 0 [L1732] NP = 0 [L1733] DC = 0 [L1734] SKIP1 = 0 [L1735] SKIP2 = 0 [L1736] MPR1 = 0 [L1737] MPR3 = 0 [L1738] IPC = 0 [L1739] pended = 0 [L1740] compFptr = 0 [L1741] compRegistered = 0 [L1742] lowerDriverReturn = 0 [L1743] setEventCalled = 0 [L1744] customIrp = 0 [L1745] routine = 0 [L1746] myStatus = 0 [L1747] pirp = 0 [L1748] Executive = 0 [L1749] Suspended = 5 [L1750] KernelMode = 0 [L1751] DeviceUsageTypePaging = 1 [L1754] pirp = irp [L1755] CALL _BLAST_init() [L67] UNLOADED = 0 [L68] NP = 1 [L69] DC = 2 [L70] SKIP1 = 3 [L71] SKIP2 = 4 [L72] MPR1 = 5 [L73] MPR3 = 6 [L74] IPC = 7 [L75] s = UNLOADED [L76] pended = 0 [L77] compFptr = 0 [L78] compRegistered = 0 [L79] lowerDriverReturn = 0 [L80] setEventCalled = 0 [L81] customIrp = 0 [L1755] RET _BLAST_init() [L1757] COND TRUE status >= 0 [L1758] s = NP [L1759] customIrp = 0 [L1760] setEventCalled = customIrp [L1761] lowerDriverReturn = setEventCalled [L1762] compRegistered = lowerDriverReturn [L1763] compFptr = compRegistered [L1764] pended = compFptr [L1765] pirp__IoStatus__Status = 0 [L1766] myStatus = 0 [L1767] COND TRUE irp_choice == 0 [L1768] pirp__IoStatus__Status = -1073741637 [L1769] myStatus = -1073741637 [L1772] CALL stub_driver_init() [L1707] s = NP [L1708] customIrp = 0 [L1709] setEventCalled = customIrp [L1710] lowerDriverReturn = setEventCalled [L1711] compRegistered = lowerDriverReturn [L1712] compFptr = compRegistered [L1713] pended = compFptr [L1772] RET stub_driver_init() [L1775] COND FALSE !(status < 0) [L1779] int tmp_ndt_1; [L1780] tmp_ndt_1 = __VERIFIER_nondet_int() [L1781] COND TRUE tmp_ndt_1 == 2 [L1798] CALL, EXPR CdAudioDeviceControl(devobj, pirp) [L313] int deviceExtension__Active = __VERIFIER_nondet_int() ; [L314] int status ; [L317] COND FALSE !(deviceExtension__Active == 2) [L320] COND FALSE !(deviceExtension__Active == 3) [L323] COND FALSE !(deviceExtension__Active == 1) [L326] COND TRUE deviceExtension__Active == 7 [L348] CALL, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L1591] int currentIrpStack__Parameters__DeviceIoControl__IoControlCode = __VERIFIER_nondet_int() ; [L1592] int deviceExtension__TargetDeviceObject = __VERIFIER_nondet_int() ; [L1593] int irpSp__Control ; [L1594] int tmp ; [L1595] int tmp___0 ; [L1596] int __cil_tmp8 ; [L1597] int __cil_tmp9 ; [L1598] int __cil_tmp10 ; [L1599] int __cil_tmp11 ; [L1600] int __cil_tmp12 ; [L1604] __cil_tmp8 = 56 [L1605] __cil_tmp9 = 16384 [L1606] __cil_tmp10 = 131072 [L1607] __cil_tmp11 = 147456 [L1608] __cil_tmp12 = 147512 [L1609] COND TRUE currentIrpStack__Parameters__DeviceIoControl__IoControlCode == __cil_tmp12 [L1610] COND FALSE !(s != NP) [L1615] COND FALSE !(compRegistered != 0) [L1620] compRegistered = 1 [L1621] routine = 0 [L1625] irpSp__Control = 224 [L1626] CALL, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1900] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1901] int returnVal2 ; [L1902] int compRetStatus ; [L1903] int lcontext = __VERIFIER_nondet_int() ; [L1904] unsigned long __cil_tmp8 ; [L1907] COND TRUE \read(compRegistered) [L1908] COND TRUE routine == 0 [L1910] CALL, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1569] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1570] int Irp__AssociatedIrp__SystemBuffer = __VERIFIER_nondet_int() ; [L1573] COND TRUE \read(Irp__PendingReturned) [L1574] COND TRUE pended == 0 [L1575] pended = 1 [L1582] COND FALSE !(myStatus >= 0) [L1587] return (myStatus); [L1910] RET, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1910] compRetStatus = HPCdrCompletion(DeviceObject, Irp, lcontext) [L1920] __cil_tmp8 = (unsigned long )compRetStatus [L1921] COND FALSE !(__cil_tmp8 == -1073741802) [L1928] COND FALSE !(\read(Irp__PendingReturned)) [L1931] int tmp_ndt_4; [L1932] tmp_ndt_4 = __VERIFIER_nondet_int() [L1933] COND TRUE tmp_ndt_4 == 0 [L1944] returnVal2 = 0 [L1958] COND TRUE s == NP [L1959] s = IPC [L1960] lowerDriverReturn = returnVal2 [L1981] return (returnVal2); [L1626] RET, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1626] tmp = IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1628] return (tmp); [L348] RET, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L348] status = CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L363] return (status); [L1798] RET, EXPR CdAudioDeviceControl(devobj, pirp) [L1798] status = CdAudioDeviceControl(devobj, pirp) [L1819] COND FALSE !(\read(we_should_unload)) [L1825] COND TRUE pended == 1 [L1826] COND FALSE !(s == NP) [L1833] COND TRUE pended == 1 [L1834] COND FALSE !(s == MPR3) [L1841] COND TRUE s != UNLOADED [L1842] COND TRUE status != -1 [L1843] COND TRUE s != SKIP2 [L1844] COND FALSE !(s != IPC) [L1857] COND FALSE !(pended != 1) [L1869] COND TRUE status != 259 [L1871] CALL errorFn() [L59] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 520 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 168.3s, OverallIterations: 70, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.2s, AutomataDifference: 133.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76311 SdHoareTripleChecker+Valid, 100.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75897 mSDsluCounter, 118903 SdHoareTripleChecker+Invalid, 84.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78948 mSDsCounter, 26412 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 183614 IncrementalHoareTripleChecker+Invalid, 210026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26412 mSolverCounterUnsat, 39955 mSDtfsCounter, 183614 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1975 GetRequests, 825 SyntacticMatches, 18 SemanticMatches, 1132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 17.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1099occurred in iteration=65, InterpolantAutomatonStates: 922, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 16.1s AutomataMinimizationTime, 69 MinimizatonAttempts, 8291 StatesRemovedByMinimization, 69 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-07 00:44:07,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...