/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:47:18,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:47:18,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:47:18,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 18:47:18,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 18:47:18,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 18:47:18,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 18:47:18,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 18:47:18,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 18:47:18,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 18:47:18,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 18:47:18,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 18:47:18,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 18:47:18,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 18:47:18,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 18:47:18,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 18:47:18,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 18:47:18,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 18:47:18,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 18:47:18,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 18:47:18,881 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 18:47:18,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 18:47:18,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 18:47:18,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 18:47:18,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 18:47:18,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 18:47:18,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 18:47:18,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 18:47:18,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 18:47:18,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 18:47:18,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 18:47:18,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 18:47:18,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 18:47:18,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 18:47:18,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 18:47:18,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 18:47:18,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 18:47:18,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 18:47:18,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 18:47:18,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:47:18,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:47:18,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:47:18,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:47:18,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:47:18,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:47:18,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:47:18,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:47:18,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:47:18,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:47:18,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:47:18,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:47:18,905 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:47:18,905 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:47:18,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:47:18,905 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:47:18,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:47:19,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:47:19,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:47:19,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:47:19,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:47:19,123 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:47:19,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-04-06 18:47:19,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4d1db0f/3f4e4e14962343e3a48488cbd0c62dfe/FLAGc91615ded [2022-04-06 18:47:19,606 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:47:19,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-04-06 18:47:19,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4d1db0f/3f4e4e14962343e3a48488cbd0c62dfe/FLAGc91615ded [2022-04-06 18:47:19,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4d1db0f/3f4e4e14962343e3a48488cbd0c62dfe [2022-04-06 18:47:19,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:47:19,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:47:19,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:47:19,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:47:19,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:47:19,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:47:19" (1/1) ... [2022-04-06 18:47:19,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cef8ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:19, skipping insertion in model container [2022-04-06 18:47:19,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:47:19" (1/1) ... [2022-04-06 18:47:19,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:47:19,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:47:19,886 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] [2022-04-06 18:47:20,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:47:20,026 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:47:20,040 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] [2022-04-06 18:47:20,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:47:20,140 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:47:20,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20 WrapperNode [2022-04-06 18:47:20,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:47:20,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:47:20,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:47:20,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:47:20,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:47:20,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:47:20,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:47:20,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:47:20,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (1/1) ... [2022-04-06 18:47:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:47:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:47:20,267 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) [2022-04-06 18:47:20,269 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 [2022-04-06 18:47:20,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-04-06 18:47:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-04-06 18:47:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-04-06 18:47:20,299 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-04-06 18:47:20,300 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-04-06 18:47:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-06 18:47:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-04-06 18:47:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-04-06 18:47:20,305 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-04-06 18:47:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-04-06 18:47:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-06 18:47:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:47:20,307 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:47:20,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:47:20,493 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:47:20,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:47:20,625 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,683 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-04-06 18:47:20,683 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-04-06 18:47:20,687 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,709 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-04-06 18:47:20,709 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-04-06 18:47:20,723 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,732 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-06 18:47:20,732 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-06 18:47:20,769 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,792 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-04-06 18:47:20,792 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-04-06 18:47:20,792 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-04-06 18:47:20,795 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,877 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-04-06 18:47:20,877 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-04-06 18:47:20,878 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,894 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-06 18:47:20,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-06 18:47:20,915 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:20,933 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-04-06 18:47:20,933 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-04-06 18:47:20,970 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:21,117 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-04-06 18:47:21,117 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-04-06 18:47:21,126 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:47:21,129 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:47:21,129 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:47:21,146 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:47:21,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:47:21,159 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:47:21,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:47:21 BoogieIcfgContainer [2022-04-06 18:47:21,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:47:21,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:47:21,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:47:21,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:47:21,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:47:19" (1/3) ... [2022-04-06 18:47:21,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4298ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:47:21, skipping insertion in model container [2022-04-06 18:47:21,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:47:20" (2/3) ... [2022-04-06 18:47:21,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4298ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:47:21, skipping insertion in model container [2022-04-06 18:47:21,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:47:21" (3/3) ... [2022-04-06 18:47:21,169 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2022-04-06 18:47:21,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:47:21,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:47:21,206 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:47:21,211 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 [2022-04-06 18:47:21,211 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:47:21,228 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) [2022-04-06 18:47:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 18:47:21,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:21,235 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] [2022-04-06 18:47:21,235 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 1 times [2022-04-06 18:47:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124600093] [2022-04-06 18:47:21,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 2 times [2022-04-06 18:47:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:21,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012657937] [2022-04-06 18:47:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:21,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:21,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012657937] [2022-04-06 18:47:21,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012657937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:21,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:21,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:47:21,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124600093] [2022-04-06 18:47:21,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124600093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:21,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:21,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:47:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155245063] [2022-04-06 18:47:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:21,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:47:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:21,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:47:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:47:21,556 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) [2022-04-06 18:47:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:23,463 INFO L93 Difference]: Finished difference Result 1047 states and 1683 transitions. [2022-04-06 18:47:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:47:23,466 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 [2022-04-06 18:47:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:23,485 INFO L225 Difference]: With dead ends: 1047 [2022-04-06 18:47:23,486 INFO L226 Difference]: Without dead ends: 665 [2022-04-06 18:47:23,494 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 [2022-04-06 18:47:23,498 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 [2022-04-06 18:47:23,500 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] [2022-04-06 18:47:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-04-06 18:47:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2022-04-06 18:47:23,646 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) [2022-04-06 18:47:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 740 transitions. [2022-04-06 18:47:23,653 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 740 transitions. Word has length 20 [2022-04-06 18:47:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:23,654 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 740 transitions. [2022-04-06 18:47:23,654 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) [2022-04-06 18:47:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 740 transitions. [2022-04-06 18:47:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 18:47:23,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:23,656 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] [2022-04-06 18:47:23,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:47:23,656 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 1 times [2022-04-06 18:47:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334671423] [2022-04-06 18:47:23,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 2 times [2022-04-06 18:47:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:23,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234878106] [2022-04-06 18:47:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:23,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:23,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:23,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234878106] [2022-04-06 18:47:23,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234878106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:23,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334671423] [2022-04-06 18:47:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334671423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:23,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:23,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560599575] [2022-04-06 18:47:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:23,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:47:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:47:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:47:23,911 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) [2022-04-06 18:47:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:25,352 INFO L93 Difference]: Finished difference Result 967 states and 1429 transitions. [2022-04-06 18:47:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:47:25,353 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 [2022-04-06 18:47:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:25,357 INFO L225 Difference]: With dead ends: 967 [2022-04-06 18:47:25,357 INFO L226 Difference]: Without dead ends: 846 [2022-04-06 18:47:25,358 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 [2022-04-06 18:47:25,359 INFO L913 BasicCegarLoop]: 853 mSDtfsCounter, 1498 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:25,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1025 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:47:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-04-06 18:47:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 664. [2022-04-06 18:47:25,415 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) [2022-04-06 18:47:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 964 transitions. [2022-04-06 18:47:25,417 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 964 transitions. Word has length 25 [2022-04-06 18:47:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:25,418 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 964 transitions. [2022-04-06 18:47:25,418 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) [2022-04-06 18:47:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 964 transitions. [2022-04-06 18:47:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 18:47:25,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:25,419 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] [2022-04-06 18:47:25,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:47:25,419 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 1 times [2022-04-06 18:47:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317933970] [2022-04-06 18:47:25,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 2 times [2022-04-06 18:47:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274902922] [2022-04-06 18:47:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:25,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:25,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:25,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274902922] [2022-04-06 18:47:25,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274902922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:25,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:25,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:25,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317933970] [2022-04-06 18:47:25,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317933970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:25,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:25,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463791378] [2022-04-06 18:47:25,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:25,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:47:25,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:47:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:47:25,588 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) [2022-04-06 18:47:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:26,982 INFO L93 Difference]: Finished difference Result 1148 states and 1650 transitions. [2022-04-06 18:47:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:47:26,983 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 [2022-04-06 18:47:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:26,999 INFO L225 Difference]: With dead ends: 1148 [2022-04-06 18:47:26,999 INFO L226 Difference]: Without dead ends: 970 [2022-04-06 18:47:27,000 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 [2022-04-06 18:47:27,001 INFO L913 BasicCegarLoop]: 725 mSDtfsCounter, 1529 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:27,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 867 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:47:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-04-06 18:47:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 789. [2022-04-06 18:47:27,100 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) [2022-04-06 18:47:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1135 transitions. [2022-04-06 18:47:27,104 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1135 transitions. Word has length 30 [2022-04-06 18:47:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:27,105 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1135 transitions. [2022-04-06 18:47:27,105 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) [2022-04-06 18:47:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1135 transitions. [2022-04-06 18:47:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 18:47:27,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:27,106 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] [2022-04-06 18:47:27,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 18:47:27,107 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 1 times [2022-04-06 18:47:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:27,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914088208] [2022-04-06 18:47:27,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 2 times [2022-04-06 18:47:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:27,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638051860] [2022-04-06 18:47:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:27,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:27,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638051860] [2022-04-06 18:47:27,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638051860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:27,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:27,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:27,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914088208] [2022-04-06 18:47:27,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914088208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:27,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:27,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931905191] [2022-04-06 18:47:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:27,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:47:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:47:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:47:27,232 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) [2022-04-06 18:47:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:29,147 INFO L93 Difference]: Finished difference Result 1630 states and 2449 transitions. [2022-04-06 18:47:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:47:29,148 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 [2022-04-06 18:47:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:29,158 INFO L225 Difference]: With dead ends: 1630 [2022-04-06 18:47:29,158 INFO L226 Difference]: Without dead ends: 1344 [2022-04-06 18:47:29,160 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 [2022-04-06 18:47:29,162 INFO L913 BasicCegarLoop]: 1009 mSDtfsCounter, 1111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:29,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1265 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:47:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-04-06 18:47:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 907. [2022-04-06 18:47:29,236 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) [2022-04-06 18:47:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1348 transitions. [2022-04-06 18:47:29,240 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1348 transitions. Word has length 31 [2022-04-06 18:47:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:29,240 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1348 transitions. [2022-04-06 18:47:29,240 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) [2022-04-06 18:47:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1348 transitions. [2022-04-06 18:47:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 18:47:29,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:29,244 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] [2022-04-06 18:47:29,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 18:47:29,244 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 1 times [2022-04-06 18:47:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526663536] [2022-04-06 18:47:29,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 2 times [2022-04-06 18:47:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:29,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573234195] [2022-04-06 18:47:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:29,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573234195] [2022-04-06 18:47:29,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573234195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:29,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:29,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:29,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526663536] [2022-04-06 18:47:29,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526663536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:29,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:29,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960856188] [2022-04-06 18:47:29,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:29,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:47:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:47:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:47:29,425 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) [2022-04-06 18:47:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:31,185 INFO L93 Difference]: Finished difference Result 1632 states and 2483 transitions. [2022-04-06 18:47:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:47:31,185 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 [2022-04-06 18:47:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:31,190 INFO L225 Difference]: With dead ends: 1632 [2022-04-06 18:47:31,190 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 18:47:31,191 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 [2022-04-06 18:47:31,192 INFO L913 BasicCegarLoop]: 738 mSDtfsCounter, 3363 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:31,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3369 Valid, 885 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:47:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 18:47:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 835. [2022-04-06 18:47:31,282 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) [2022-04-06 18:47:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1203 transitions. [2022-04-06 18:47:31,285 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1203 transitions. Word has length 32 [2022-04-06 18:47:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:31,285 INFO L478 AbstractCegarLoop]: Abstraction has 835 states and 1203 transitions. [2022-04-06 18:47:31,285 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) [2022-04-06 18:47:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1203 transitions. [2022-04-06 18:47:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 18:47:31,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:31,286 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] [2022-04-06 18:47:31,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 18:47:31,287 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 1 times [2022-04-06 18:47:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:31,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314487257] [2022-04-06 18:47:31,287 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 2 times [2022-04-06 18:47:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:31,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433376961] [2022-04-06 18:47:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:31,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433376961] [2022-04-06 18:47:31,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433376961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:31,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:31,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:31,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314487257] [2022-04-06 18:47:31,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314487257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:31,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:31,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086792714] [2022-04-06 18:47:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:31,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:47:31,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:47:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:47:31,389 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) [2022-04-06 18:47:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:32,967 INFO L93 Difference]: Finished difference Result 965 states and 1425 transitions. [2022-04-06 18:47:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:47:32,968 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 [2022-04-06 18:47:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:32,972 INFO L225 Difference]: With dead ends: 965 [2022-04-06 18:47:32,972 INFO L226 Difference]: Without dead ends: 961 [2022-04-06 18:47:32,972 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 [2022-04-06 18:47:32,973 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 [2022-04-06 18:47:32,973 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] [2022-04-06 18:47:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-04-06 18:47:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 834. [2022-04-06 18:47:33,063 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) [2022-04-06 18:47:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1200 transitions. [2022-04-06 18:47:33,066 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1200 transitions. Word has length 36 [2022-04-06 18:47:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:33,066 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1200 transitions. [2022-04-06 18:47:33,066 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) [2022-04-06 18:47:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1200 transitions. [2022-04-06 18:47:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 18:47:33,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:33,068 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] [2022-04-06 18:47:33,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 18:47:33,069 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 1 times [2022-04-06 18:47:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761659940] [2022-04-06 18:47:33,071 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 2 times [2022-04-06 18:47:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5862166] [2022-04-06 18:47:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:33,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:33,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5862166] [2022-04-06 18:47:33,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5862166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:33,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:33,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:33,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:33,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761659940] [2022-04-06 18:47:33,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761659940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:33,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:33,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592125555] [2022-04-06 18:47:33,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:33,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:47:33,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:47:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:47:33,217 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) [2022-04-06 18:47:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:34,829 INFO L93 Difference]: Finished difference Result 1417 states and 2024 transitions. [2022-04-06 18:47:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:47:34,830 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 [2022-04-06 18:47:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:34,834 INFO L225 Difference]: With dead ends: 1417 [2022-04-06 18:47:34,834 INFO L226 Difference]: Without dead ends: 999 [2022-04-06 18:47:34,835 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 [2022-04-06 18:47:34,836 INFO L913 BasicCegarLoop]: 821 mSDtfsCounter, 1494 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:34,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1252 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:47:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-04-06 18:47:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2022-04-06 18:47:34,916 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) [2022-04-06 18:47:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1029 transitions. [2022-04-06 18:47:34,918 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1029 transitions. Word has length 39 [2022-04-06 18:47:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:34,919 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1029 transitions. [2022-04-06 18:47:34,919 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) [2022-04-06 18:47:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1029 transitions. [2022-04-06 18:47:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 18:47:34,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:34,920 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] [2022-04-06 18:47:34,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 18:47:34,920 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 1 times [2022-04-06 18:47:34,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288536276] [2022-04-06 18:47:34,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 2 times [2022-04-06 18:47:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:34,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269806834] [2022-04-06 18:47:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:35,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:35,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269806834] [2022-04-06 18:47:35,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269806834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:35,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:35,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:35,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:35,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288536276] [2022-04-06 18:47:35,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288536276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:35,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:35,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:47:35,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081020047] [2022-04-06 18:47:35,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:35,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:47:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:47:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:47:35,054 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) [2022-04-06 18:47:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:36,432 INFO L93 Difference]: Finished difference Result 979 states and 1409 transitions. [2022-04-06 18:47:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:47:36,432 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 [2022-04-06 18:47:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:36,436 INFO L225 Difference]: With dead ends: 979 [2022-04-06 18:47:36,436 INFO L226 Difference]: Without dead ends: 959 [2022-04-06 18:47:36,436 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 [2022-04-06 18:47:36,437 INFO L913 BasicCegarLoop]: 672 mSDtfsCounter, 1124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:36,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 773 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:47:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-06 18:47:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 762. [2022-04-06 18:47:36,526 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) [2022-04-06 18:47:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1064 transitions. [2022-04-06 18:47:36,532 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1064 transitions. Word has length 40 [2022-04-06 18:47:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:36,533 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1064 transitions. [2022-04-06 18:47:36,533 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) [2022-04-06 18:47:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1064 transitions. [2022-04-06 18:47:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 18:47:36,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:36,536 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] [2022-04-06 18:47:36,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 18:47:36,536 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:36,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:36,537 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 1 times [2022-04-06 18:47:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:36,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614932322] [2022-04-06 18:47:36,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 2 times [2022-04-06 18:47:36,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:36,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806066799] [2022-04-06 18:47:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:36,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:36,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 18:47:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:36,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806066799] [2022-04-06 18:47:36,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806066799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:36,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:36,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:36,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614932322] [2022-04-06 18:47:36,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614932322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:36,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:36,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:36,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056181228] [2022-04-06 18:47:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:36,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:47:36,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:47:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:47:36,654 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) [2022-04-06 18:47:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:37,909 INFO L93 Difference]: Finished difference Result 1167 states and 1671 transitions. [2022-04-06 18:47:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:47:37,910 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 [2022-04-06 18:47:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:37,920 INFO L225 Difference]: With dead ends: 1167 [2022-04-06 18:47:37,920 INFO L226 Difference]: Without dead ends: 942 [2022-04-06 18:47:37,921 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 [2022-04-06 18:47:37,926 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:37,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1318 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:47:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-04-06 18:47:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 762. [2022-04-06 18:47:38,026 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) [2022-04-06 18:47:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1063 transitions. [2022-04-06 18:47:38,028 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1063 transitions. Word has length 46 [2022-04-06 18:47:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:38,028 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1063 transitions. [2022-04-06 18:47:38,028 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) [2022-04-06 18:47:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1063 transitions. [2022-04-06 18:47:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:47:38,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:38,030 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] [2022-04-06 18:47:38,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 18:47:38,030 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 1 times [2022-04-06 18:47:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729022955] [2022-04-06 18:47:38,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 2 times [2022-04-06 18:47:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502222995] [2022-04-06 18:47:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:38,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:38,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:38,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 18:47:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502222995] [2022-04-06 18:47:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502222995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:38,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:38,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729022955] [2022-04-06 18:47:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729022955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:38,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700439191] [2022-04-06 18:47:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:38,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:47:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:47:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:47:38,148 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) [2022-04-06 18:47:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:39,583 INFO L93 Difference]: Finished difference Result 964 states and 1383 transitions. [2022-04-06 18:47:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:47:39,583 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 [2022-04-06 18:47:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:39,589 INFO L225 Difference]: With dead ends: 964 [2022-04-06 18:47:39,589 INFO L226 Difference]: Without dead ends: 897 [2022-04-06 18:47:39,590 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 [2022-04-06 18:47:39,591 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 [2022-04-06 18:47:39,592 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] [2022-04-06 18:47:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-04-06 18:47:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 751. [2022-04-06 18:47:39,706 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) [2022-04-06 18:47:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1050 transitions. [2022-04-06 18:47:39,710 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1050 transitions. Word has length 47 [2022-04-06 18:47:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:39,710 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1050 transitions. [2022-04-06 18:47:39,710 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) [2022-04-06 18:47:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1050 transitions. [2022-04-06 18:47:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 18:47:39,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:39,716 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] [2022-04-06 18:47:39,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 18:47:39,716 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 1 times [2022-04-06 18:47:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:39,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [648229041] [2022-04-06 18:47:39,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 2 times [2022-04-06 18:47:39,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:39,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16933925] [2022-04-06 18:47:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16933925] [2022-04-06 18:47:39,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16933925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:39,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:39,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:47:39,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [648229041] [2022-04-06 18:47:39,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [648229041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:39,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:39,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:47:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803442430] [2022-04-06 18:47:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:39,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:47:39,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:47:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:47:39,904 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) [2022-04-06 18:47:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:42,125 INFO L93 Difference]: Finished difference Result 1067 states and 1515 transitions. [2022-04-06 18:47:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:47:42,126 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 [2022-04-06 18:47:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:42,129 INFO L225 Difference]: With dead ends: 1067 [2022-04-06 18:47:42,129 INFO L226 Difference]: Without dead ends: 1006 [2022-04-06 18:47:42,130 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 [2022-04-06 18:47:42,130 INFO L913 BasicCegarLoop]: 753 mSDtfsCounter, 1832 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:42,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 1732 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:47:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-04-06 18:47:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 794. [2022-04-06 18:47:42,257 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) [2022-04-06 18:47:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-04-06 18:47:42,259 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 48 [2022-04-06 18:47:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:42,259 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-04-06 18:47:42,259 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) [2022-04-06 18:47:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-04-06 18:47:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:47:42,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:42,261 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] [2022-04-06 18:47:42,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 18:47:42,261 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:42,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:42,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 1 times [2022-04-06 18:47:42,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:42,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494102804] [2022-04-06 18:47:42,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:42,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 2 times [2022-04-06 18:47:42,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:42,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524767159] [2022-04-06 18:47:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:42,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:42,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524767159] [2022-04-06 18:47:42,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524767159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:42,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:42,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:47:42,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494102804] [2022-04-06 18:47:42,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494102804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:42,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:42,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:47:42,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230418863] [2022-04-06 18:47:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:42,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:47:42,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:47:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:47:42,405 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) [2022-04-06 18:47:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:44,519 INFO L93 Difference]: Finished difference Result 952 states and 1368 transitions. [2022-04-06 18:47:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:47:44,520 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 [2022-04-06 18:47:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:44,523 INFO L225 Difference]: With dead ends: 952 [2022-04-06 18:47:44,523 INFO L226 Difference]: Without dead ends: 924 [2022-04-06 18:47:44,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:47:44,524 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1180 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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 [2022-04-06 18:47:44,524 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] [2022-04-06 18:47:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-04-06 18:47:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 797. [2022-04-06 18:47:44,639 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) [2022-04-06 18:47:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1115 transitions. [2022-04-06 18:47:44,641 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1115 transitions. Word has length 50 [2022-04-06 18:47:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:44,642 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1115 transitions. [2022-04-06 18:47:44,642 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) [2022-04-06 18:47:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1115 transitions. [2022-04-06 18:47:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:47:44,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:44,643 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] [2022-04-06 18:47:44,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 18:47:44,644 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 1 times [2022-04-06 18:47:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691906261] [2022-04-06 18:47:44,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 2 times [2022-04-06 18:47:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092819267] [2022-04-06 18:47:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:44,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092819267] [2022-04-06 18:47:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092819267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:44,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:44,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:44,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691906261] [2022-04-06 18:47:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691906261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:44,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031302737] [2022-04-06 18:47:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:44,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:47:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:47:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:47:44,796 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) [2022-04-06 18:47:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:46,736 INFO L93 Difference]: Finished difference Result 978 states and 1402 transitions. [2022-04-06 18:47:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:47:46,736 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 [2022-04-06 18:47:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:46,739 INFO L225 Difference]: With dead ends: 978 [2022-04-06 18:47:46,740 INFO L226 Difference]: Without dead ends: 914 [2022-04-06 18:47:46,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:47:46,742 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1576 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:46,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1818 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:47:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-04-06 18:47:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 792. [2022-04-06 18:47:46,856 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) [2022-04-06 18:47:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1105 transitions. [2022-04-06 18:47:46,858 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1105 transitions. Word has length 50 [2022-04-06 18:47:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:46,859 INFO L478 AbstractCegarLoop]: Abstraction has 792 states and 1105 transitions. [2022-04-06 18:47:46,859 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) [2022-04-06 18:47:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1105 transitions. [2022-04-06 18:47:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:47:46,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:46,861 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] [2022-04-06 18:47:46,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 18:47:46,861 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 1 times [2022-04-06 18:47:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478914130] [2022-04-06 18:47:46,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 2 times [2022-04-06 18:47:46,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:46,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716036748] [2022-04-06 18:47:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716036748] [2022-04-06 18:47:46,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716036748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:46,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:46,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:46,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478914130] [2022-04-06 18:47:46,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478914130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:46,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:46,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:47:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098981237] [2022-04-06 18:47:46,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:46,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:47:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:47:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:47:46,980 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) [2022-04-06 18:47:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:48,227 INFO L93 Difference]: Finished difference Result 1090 states and 1555 transitions. [2022-04-06 18:47:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:47:48,227 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 [2022-04-06 18:47:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:48,232 INFO L225 Difference]: With dead ends: 1090 [2022-04-06 18:47:48,232 INFO L226 Difference]: Without dead ends: 1074 [2022-04-06 18:47:48,235 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 [2022-04-06 18:47:48,236 INFO L913 BasicCegarLoop]: 799 mSDtfsCounter, 890 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:48,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1338 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:47:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-04-06 18:47:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 848. [2022-04-06 18:47:48,370 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) [2022-04-06 18:47:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1165 transitions. [2022-04-06 18:47:48,373 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1165 transitions. Word has length 50 [2022-04-06 18:47:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:48,374 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 1165 transitions. [2022-04-06 18:47:48,374 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) [2022-04-06 18:47:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1165 transitions. [2022-04-06 18:47:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:47:48,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:48,376 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] [2022-04-06 18:47:48,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 18:47:48,376 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:48,377 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 1 times [2022-04-06 18:47:48,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:48,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326951998] [2022-04-06 18:47:48,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 2 times [2022-04-06 18:47:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:48,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430170865] [2022-04-06 18:47:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:47:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:48,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430170865] [2022-04-06 18:47:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430170865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:48,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:48,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326951998] [2022-04-06 18:47:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326951998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:48,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815200269] [2022-04-06 18:47:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:48,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:47:48,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:47:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:47:48,551 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) [2022-04-06 18:47:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:49,755 INFO L93 Difference]: Finished difference Result 996 states and 1410 transitions. [2022-04-06 18:47:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:47:49,756 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 [2022-04-06 18:47:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:49,759 INFO L225 Difference]: With dead ends: 996 [2022-04-06 18:47:49,759 INFO L226 Difference]: Without dead ends: 991 [2022-04-06 18:47:49,759 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 [2022-04-06 18:47:49,759 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 [2022-04-06 18:47:49,760 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] [2022-04-06 18:47:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-04-06 18:47:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 867. [2022-04-06 18:47:49,890 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) [2022-04-06 18:47:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1188 transitions. [2022-04-06 18:47:49,892 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1188 transitions. Word has length 52 [2022-04-06 18:47:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:49,892 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1188 transitions. [2022-04-06 18:47:49,892 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) [2022-04-06 18:47:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1188 transitions. [2022-04-06 18:47:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:47:49,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:49,894 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] [2022-04-06 18:47:49,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 18:47:49,894 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 1 times [2022-04-06 18:47:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658504183] [2022-04-06 18:47:49,894 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 2 times [2022-04-06 18:47:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:49,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006461223] [2022-04-06 18:47:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:47:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 18:47:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006461223] [2022-04-06 18:47:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006461223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:49,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:47:49,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658504183] [2022-04-06 18:47:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658504183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:49,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:47:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755170191] [2022-04-06 18:47:49,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:49,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:47:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:47:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:47:49,996 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) [2022-04-06 18:47:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:51,740 INFO L93 Difference]: Finished difference Result 1203 states and 1692 transitions. [2022-04-06 18:47:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:47:51,740 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 [2022-04-06 18:47:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:51,744 INFO L225 Difference]: With dead ends: 1203 [2022-04-06 18:47:51,744 INFO L226 Difference]: Without dead ends: 956 [2022-04-06 18:47:51,745 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 [2022-04-06 18:47:51,745 INFO L913 BasicCegarLoop]: 641 mSDtfsCounter, 700 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:51,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1175 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:47:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-04-06 18:47:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 836. [2022-04-06 18:47:51,899 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) [2022-04-06 18:47:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1148 transitions. [2022-04-06 18:47:51,901 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1148 transitions. Word has length 54 [2022-04-06 18:47:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:51,901 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1148 transitions. [2022-04-06 18:47:51,901 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) [2022-04-06 18:47:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1148 transitions. [2022-04-06 18:47:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:47:51,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:51,902 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] [2022-04-06 18:47:51,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 18:47:51,903 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 1 times [2022-04-06 18:47:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343706632] [2022-04-06 18:47:51,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 2 times [2022-04-06 18:47:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:51,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988017613] [2022-04-06 18:47:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:51,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:51,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988017613] [2022-04-06 18:47:52,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988017613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:52,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:52,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:52,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343706632] [2022-04-06 18:47:52,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343706632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:52,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:52,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185518426] [2022-04-06 18:47:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:52,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:47:52,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:47:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:47:52,048 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) [2022-04-06 18:47:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:53,969 INFO L93 Difference]: Finished difference Result 971 states and 1378 transitions. [2022-04-06 18:47:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:47:53,970 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 [2022-04-06 18:47:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:53,974 INFO L225 Difference]: With dead ends: 971 [2022-04-06 18:47:53,974 INFO L226 Difference]: Without dead ends: 967 [2022-04-06 18:47:53,974 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 [2022-04-06 18:47:53,975 INFO L913 BasicCegarLoop]: 706 mSDtfsCounter, 735 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:53,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2358 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:47:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-04-06 18:47:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 843. [2022-04-06 18:47:54,158 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) [2022-04-06 18:47:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1157 transitions. [2022-04-06 18:47:54,160 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1157 transitions. Word has length 51 [2022-04-06 18:47:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:54,160 INFO L478 AbstractCegarLoop]: Abstraction has 843 states and 1157 transitions. [2022-04-06 18:47:54,160 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) [2022-04-06 18:47:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1157 transitions. [2022-04-06 18:47:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:47:54,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:54,162 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] [2022-04-06 18:47:54,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 18:47:54,163 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 1 times [2022-04-06 18:47:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:54,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136986592] [2022-04-06 18:47:54,163 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 2 times [2022-04-06 18:47:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:54,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617075290] [2022-04-06 18:47:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:54,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617075290] [2022-04-06 18:47:54,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617075290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:54,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:54,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:54,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136986592] [2022-04-06 18:47:54,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136986592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:54,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:54,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:47:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966308978] [2022-04-06 18:47:54,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:54,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:47:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:47:54,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:47:54,348 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) [2022-04-06 18:47:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:56,691 INFO L93 Difference]: Finished difference Result 986 states and 1394 transitions. [2022-04-06 18:47:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:47:56,691 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 [2022-04-06 18:47:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:56,695 INFO L225 Difference]: With dead ends: 986 [2022-04-06 18:47:56,695 INFO L226 Difference]: Without dead ends: 962 [2022-04-06 18:47:56,695 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 [2022-04-06 18:47:56,695 INFO L913 BasicCegarLoop]: 708 mSDtfsCounter, 737 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 3844 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:56,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2456 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3844 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:47:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-04-06 18:47:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 842. [2022-04-06 18:47:56,838 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) [2022-04-06 18:47:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1155 transitions. [2022-04-06 18:47:56,839 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1155 transitions. Word has length 51 [2022-04-06 18:47:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:56,840 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1155 transitions. [2022-04-06 18:47:56,840 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) [2022-04-06 18:47:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1155 transitions. [2022-04-06 18:47:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:47:56,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:56,841 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] [2022-04-06 18:47:56,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 18:47:56,841 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 1 times [2022-04-06 18:47:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:56,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195689675] [2022-04-06 18:47:56,843 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 2 times [2022-04-06 18:47:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098935966] [2022-04-06 18:47:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:56,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:56,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:47:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:57,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:57,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098935966] [2022-04-06 18:47:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098935966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:47:57,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195689675] [2022-04-06 18:47:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195689675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:47:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078249218] [2022-04-06 18:47:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:57,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:47:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:47:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:47:57,059 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) [2022-04-06 18:47:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:58,799 INFO L93 Difference]: Finished difference Result 974 states and 1378 transitions. [2022-04-06 18:47:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:47:58,799 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 [2022-04-06 18:47:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:58,816 INFO L225 Difference]: With dead ends: 974 [2022-04-06 18:47:58,817 INFO L226 Difference]: Without dead ends: 968 [2022-04-06 18:47:58,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:47:58,817 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 2613 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-04-06 18:47:58,818 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] [2022-04-06 18:47:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-04-06 18:47:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 842. [2022-04-06 18:47:58,977 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) [2022-04-06 18:47:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1154 transitions. [2022-04-06 18:47:58,979 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1154 transitions. Word has length 53 [2022-04-06 18:47:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:58,979 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1154 transitions. [2022-04-06 18:47:58,979 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) [2022-04-06 18:47:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1154 transitions. [2022-04-06 18:47:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:47:58,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:58,981 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] [2022-04-06 18:47:58,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 18:47:58,981 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 1 times [2022-04-06 18:47:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:58,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635590972] [2022-04-06 18:47:58,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:47:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 2 times [2022-04-06 18:47:58,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:58,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846838913] [2022-04-06 18:47:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:58,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:47:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:47:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:47:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:47:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:47:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:47:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846838913] [2022-04-06 18:47:59,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846838913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:59,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:59,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:59,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635590972] [2022-04-06 18:47:59,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635590972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:59,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:59,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:47:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110125454] [2022-04-06 18:47:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:59,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:47:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:47:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:47:59,111 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) [2022-04-06 18:48:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:00,842 INFO L93 Difference]: Finished difference Result 979 states and 1383 transitions. [2022-04-06 18:48:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:48:00,842 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 [2022-04-06 18:48:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:00,845 INFO L225 Difference]: With dead ends: 979 [2022-04-06 18:48:00,845 INFO L226 Difference]: Without dead ends: 943 [2022-04-06 18:48:00,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:48:00,847 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 1565 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:00,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1284 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:48:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-04-06 18:48:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 815. [2022-04-06 18:48:01,042 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) [2022-04-06 18:48:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1124 transitions. [2022-04-06 18:48:01,043 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1124 transitions. Word has length 52 [2022-04-06 18:48:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:01,044 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1124 transitions. [2022-04-06 18:48:01,044 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) [2022-04-06 18:48:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1124 transitions. [2022-04-06 18:48:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:48:01,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:01,045 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] [2022-04-06 18:48:01,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 18:48:01,046 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 1 times [2022-04-06 18:48:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853910893] [2022-04-06 18:48:01,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 2 times [2022-04-06 18:48:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447232344] [2022-04-06 18:48:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447232344] [2022-04-06 18:48:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447232344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:01,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:01,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853910893] [2022-04-06 18:48:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853910893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:01,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:48:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511110680] [2022-04-06 18:48:01,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:01,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:48:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:48:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:48:01,296 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) [2022-04-06 18:48:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:03,186 INFO L93 Difference]: Finished difference Result 945 states and 1345 transitions. [2022-04-06 18:48:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:48:03,186 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 [2022-04-06 18:48:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:03,189 INFO L225 Difference]: With dead ends: 945 [2022-04-06 18:48:03,189 INFO L226 Difference]: Without dead ends: 939 [2022-04-06 18:48:03,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:48:03,190 INFO L913 BasicCegarLoop]: 630 mSDtfsCounter, 2544 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:03,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 1558 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-04-06 18:48:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 815. [2022-04-06 18:48:03,347 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) [2022-04-06 18:48:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1123 transitions. [2022-04-06 18:48:03,349 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1123 transitions. Word has length 54 [2022-04-06 18:48:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:03,349 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1123 transitions. [2022-04-06 18:48:03,349 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) [2022-04-06 18:48:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1123 transitions. [2022-04-06 18:48:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 18:48:03,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:03,351 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] [2022-04-06 18:48:03,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 18:48:03,351 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 1 times [2022-04-06 18:48:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:03,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [784443361] [2022-04-06 18:48:03,351 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 2 times [2022-04-06 18:48:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533669899] [2022-04-06 18:48:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:03,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533669899] [2022-04-06 18:48:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533669899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:03,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:03,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:03,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:03,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [784443361] [2022-04-06 18:48:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [784443361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:03,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:03,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805180701] [2022-04-06 18:48:03,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:03,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:48:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:48:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:48:03,511 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) [2022-04-06 18:48:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:05,839 INFO L93 Difference]: Finished difference Result 966 states and 1372 transitions. [2022-04-06 18:48:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:48:05,841 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 [2022-04-06 18:48:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:05,844 INFO L225 Difference]: With dead ends: 966 [2022-04-06 18:48:05,844 INFO L226 Difference]: Without dead ends: 926 [2022-04-06 18:48:05,845 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 [2022-04-06 18:48:05,845 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1069 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:05,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2475 Invalid, 4890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:48:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-04-06 18:48:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 806. [2022-04-06 18:48:06,003 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) [2022-04-06 18:48:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1099 transitions. [2022-04-06 18:48:06,015 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1099 transitions. Word has length 55 [2022-04-06 18:48:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:06,015 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1099 transitions. [2022-04-06 18:48:06,015 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) [2022-04-06 18:48:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1099 transitions. [2022-04-06 18:48:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 18:48:06,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:06,016 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] [2022-04-06 18:48:06,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 18:48:06,017 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 1 times [2022-04-06 18:48:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029556606] [2022-04-06 18:48:06,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 2 times [2022-04-06 18:48:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:06,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934669392] [2022-04-06 18:48:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934669392] [2022-04-06 18:48:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934669392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:06,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:06,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:06,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029556606] [2022-04-06 18:48:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029556606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679690354] [2022-04-06 18:48:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:06,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:48:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:48:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:48:06,247 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) [2022-04-06 18:48:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:08,972 INFO L93 Difference]: Finished difference Result 942 states and 1326 transitions. [2022-04-06 18:48:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:48:08,973 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 [2022-04-06 18:48:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:08,984 INFO L225 Difference]: With dead ends: 942 [2022-04-06 18:48:08,984 INFO L226 Difference]: Without dead ends: 924 [2022-04-06 18:48:08,985 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 [2022-04-06 18:48:08,986 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, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:08,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2682 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 18:48:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-04-06 18:48:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 804. [2022-04-06 18:48:09,234 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) [2022-04-06 18:48:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1095 transitions. [2022-04-06 18:48:09,236 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1095 transitions. Word has length 56 [2022-04-06 18:48:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:09,236 INFO L478 AbstractCegarLoop]: Abstraction has 804 states and 1095 transitions. [2022-04-06 18:48:09,237 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) [2022-04-06 18:48:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1095 transitions. [2022-04-06 18:48:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 18:48:09,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:09,239 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] [2022-04-06 18:48:09,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 18:48:09,239 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 1 times [2022-04-06 18:48:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:09,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853816472] [2022-04-06 18:48:09,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 2 times [2022-04-06 18:48:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:09,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514324447] [2022-04-06 18:48:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:09,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:48:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:09,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514324447] [2022-04-06 18:48:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514324447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:09,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:09,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:09,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:09,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853816472] [2022-04-06 18:48:09,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853816472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:09,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:09,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:48:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133486940] [2022-04-06 18:48:09,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:09,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:48:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:48:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:48:09,467 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) [2022-04-06 18:48:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:11,454 INFO L93 Difference]: Finished difference Result 937 states and 1319 transitions. [2022-04-06 18:48:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:48:11,455 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 [2022-04-06 18:48:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:11,458 INFO L225 Difference]: With dead ends: 937 [2022-04-06 18:48:11,458 INFO L226 Difference]: Without dead ends: 919 [2022-04-06 18:48:11,458 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 [2022-04-06 18:48:11,459 INFO L913 BasicCegarLoop]: 657 mSDtfsCounter, 682 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:11,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2653 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:48:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-04-06 18:48:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 799. [2022-04-06 18:48:11,633 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) [2022-04-06 18:48:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1088 transitions. [2022-04-06 18:48:11,635 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1088 transitions. Word has length 55 [2022-04-06 18:48:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:11,635 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1088 transitions. [2022-04-06 18:48:11,635 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) [2022-04-06 18:48:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1088 transitions. [2022-04-06 18:48:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 18:48:11,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:11,636 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] [2022-04-06 18:48:11,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 18:48:11,637 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 1 times [2022-04-06 18:48:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151685736] [2022-04-06 18:48:11,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 2 times [2022-04-06 18:48:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522663744] [2022-04-06 18:48:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:48:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:48:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522663744] [2022-04-06 18:48:11,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522663744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:11,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:11,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:11,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151685736] [2022-04-06 18:48:11,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151685736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:11,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:11,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013431667] [2022-04-06 18:48:11,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:11,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:48:11,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:48:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:11,780 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) [2022-04-06 18:48:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:13,094 INFO L93 Difference]: Finished difference Result 984 states and 1370 transitions. [2022-04-06 18:48:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:48:13,094 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 [2022-04-06 18:48:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:13,099 INFO L225 Difference]: With dead ends: 984 [2022-04-06 18:48:13,099 INFO L226 Difference]: Without dead ends: 941 [2022-04-06 18:48:13,099 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 [2022-04-06 18:48:13,100 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:13,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1190 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-04-06 18:48:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 799. [2022-04-06 18:48:13,286 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) [2022-04-06 18:48:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1087 transitions. [2022-04-06 18:48:13,288 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1087 transitions. Word has length 56 [2022-04-06 18:48:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:13,288 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1087 transitions. [2022-04-06 18:48:13,288 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) [2022-04-06 18:48:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1087 transitions. [2022-04-06 18:48:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 18:48:13,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:13,290 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] [2022-04-06 18:48:13,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 18:48:13,290 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 1 times [2022-04-06 18:48:13,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:13,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106700269] [2022-04-06 18:48:13,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 2 times [2022-04-06 18:48:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:13,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237967345] [2022-04-06 18:48:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:13,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 18:48:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:48:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:13,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237967345] [2022-04-06 18:48:13,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237967345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:48:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946270739] [2022-04-06 18:48:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:48:13,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:48:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:48:13,428 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) [2022-04-06 18:48:13,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:48:13,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:48:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:48:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 18:48:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:48:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:13,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:48:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:14,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946270739] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 18:48:14,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:48:14,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 15 [2022-04-06 18:48:14,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106700269] [2022-04-06 18:48:14,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106700269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:14,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:14,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:48:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735077503] [2022-04-06 18:48:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:14,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:48:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:48:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:48:14,026 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) [2022-04-06 18:48:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:14,502 INFO L93 Difference]: Finished difference Result 1117 states and 1518 transitions. [2022-04-06 18:48:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:48:14,503 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 [2022-04-06 18:48:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:14,506 INFO L225 Difference]: With dead ends: 1117 [2022-04-06 18:48:14,506 INFO L226 Difference]: Without dead ends: 953 [2022-04-06 18:48:14,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:48:14,507 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 882 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:14,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1125 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:48:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-04-06 18:48:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 837. [2022-04-06 18:48:14,702 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) [2022-04-06 18:48:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1142 transitions. [2022-04-06 18:48:14,704 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1142 transitions. Word has length 74 [2022-04-06 18:48:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:14,704 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1142 transitions. [2022-04-06 18:48:14,704 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) [2022-04-06 18:48:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1142 transitions. [2022-04-06 18:48:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 18:48:14,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:14,706 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] [2022-04-06 18:48:14,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 18:48:14,924 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 [2022-04-06 18:48:14,924 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 1 times [2022-04-06 18:48:14,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995752751] [2022-04-06 18:48:14,925 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 2 times [2022-04-06 18:48:14,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715682476] [2022-04-06 18:48:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:15,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715682476] [2022-04-06 18:48:15,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715682476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:15,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:15,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:15,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:15,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995752751] [2022-04-06 18:48:15,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995752751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:15,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:15,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121920743] [2022-04-06 18:48:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:15,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:48:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:48:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:48:15,212 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) [2022-04-06 18:48:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:17,537 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2022-04-06 18:48:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:48:17,537 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 [2022-04-06 18:48:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:17,540 INFO L225 Difference]: With dead ends: 984 [2022-04-06 18:48:17,540 INFO L226 Difference]: Without dead ends: 958 [2022-04-06 18:48:17,541 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 [2022-04-06 18:48:17,541 INFO L913 BasicCegarLoop]: 636 mSDtfsCounter, 2002 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 5902 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:17,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 3173 Invalid, 6727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 5902 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:48:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-04-06 18:48:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 836. [2022-04-06 18:48:17,755 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) [2022-04-06 18:48:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1131 transitions. [2022-04-06 18:48:17,757 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1131 transitions. Word has length 59 [2022-04-06 18:48:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:17,757 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1131 transitions. [2022-04-06 18:48:17,757 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) [2022-04-06 18:48:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1131 transitions. [2022-04-06 18:48:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:48:17,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:17,759 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] [2022-04-06 18:48:17,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 18:48:17,759 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 1 times [2022-04-06 18:48:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:17,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170772587] [2022-04-06 18:48:17,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 2 times [2022-04-06 18:48:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336201496] [2022-04-06 18:48:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336201496] [2022-04-06 18:48:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336201496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:17,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:17,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170772587] [2022-04-06 18:48:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170772587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:17,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302789242] [2022-04-06 18:48:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:17,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:48:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:48:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:48:17,984 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) [2022-04-06 18:48:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:20,435 INFO L93 Difference]: Finished difference Result 973 states and 1356 transitions. [2022-04-06 18:48:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:48:20,436 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 [2022-04-06 18:48:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:20,451 INFO L225 Difference]: With dead ends: 973 [2022-04-06 18:48:20,452 INFO L226 Difference]: Without dead ends: 953 [2022-04-06 18:48:20,452 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 [2022-04-06 18:48:20,452 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 941 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:20,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 2903 Invalid, 5479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5082 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:48:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-04-06 18:48:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-04-06 18:48:20,638 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) [2022-04-06 18:48:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1126 transitions. [2022-04-06 18:48:20,639 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1126 transitions. Word has length 58 [2022-04-06 18:48:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:20,639 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1126 transitions. [2022-04-06 18:48:20,639 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) [2022-04-06 18:48:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1126 transitions. [2022-04-06 18:48:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 18:48:20,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:20,641 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] [2022-04-06 18:48:20,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 18:48:20,641 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 1 times [2022-04-06 18:48:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:20,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645319903] [2022-04-06 18:48:20,641 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 2 times [2022-04-06 18:48:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211631429] [2022-04-06 18:48:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:48:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:20,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211631429] [2022-04-06 18:48:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211631429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:20,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:20,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:20,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645319903] [2022-04-06 18:48:20,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645319903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:20,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:20,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087803734] [2022-04-06 18:48:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:20,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:48:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:48:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:48:20,838 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) [2022-04-06 18:48:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:23,286 INFO L93 Difference]: Finished difference Result 1006 states and 1388 transitions. [2022-04-06 18:48:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:48:23,286 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 [2022-04-06 18:48:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:23,289 INFO L225 Difference]: With dead ends: 1006 [2022-04-06 18:48:23,289 INFO L226 Difference]: Without dead ends: 938 [2022-04-06 18:48:23,290 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 [2022-04-06 18:48:23,291 INFO L913 BasicCegarLoop]: 628 mSDtfsCounter, 673 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:23,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 2419 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 4402 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:48:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-04-06 18:48:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 821. [2022-04-06 18:48:23,490 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) [2022-04-06 18:48:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1105 transitions. [2022-04-06 18:48:23,492 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1105 transitions. Word has length 59 [2022-04-06 18:48:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:23,492 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1105 transitions. [2022-04-06 18:48:23,492 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) [2022-04-06 18:48:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1105 transitions. [2022-04-06 18:48:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:48:23,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:23,493 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] [2022-04-06 18:48:23,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 18:48:23,493 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 1 times [2022-04-06 18:48:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760346290] [2022-04-06 18:48:23,494 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 2 times [2022-04-06 18:48:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643438978] [2022-04-06 18:48:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:48:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643438978] [2022-04-06 18:48:23,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643438978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:23,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:23,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:23,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:23,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760346290] [2022-04-06 18:48:23,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760346290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:23,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:23,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:23,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401187311] [2022-04-06 18:48:23,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:23,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:23,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:23,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:23,657 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) [2022-04-06 18:48:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:25,499 INFO L93 Difference]: Finished difference Result 1102 states and 1563 transitions. [2022-04-06 18:48:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:25,499 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 [2022-04-06 18:48:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:25,502 INFO L225 Difference]: With dead ends: 1102 [2022-04-06 18:48:25,502 INFO L226 Difference]: Without dead ends: 991 [2022-04-06 18:48:25,503 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 [2022-04-06 18:48:25,504 INFO L913 BasicCegarLoop]: 608 mSDtfsCounter, 400 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:25,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1570 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-04-06 18:48:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 828. [2022-04-06 18:48:25,738 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) [2022-04-06 18:48:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1121 transitions. [2022-04-06 18:48:25,740 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1121 transitions. Word has length 60 [2022-04-06 18:48:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:25,740 INFO L478 AbstractCegarLoop]: Abstraction has 828 states and 1121 transitions. [2022-04-06 18:48:25,740 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) [2022-04-06 18:48:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1121 transitions. [2022-04-06 18:48:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:48:25,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:25,742 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] [2022-04-06 18:48:25,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 18:48:25,742 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 1 times [2022-04-06 18:48:25,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350495592] [2022-04-06 18:48:25,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 2 times [2022-04-06 18:48:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:25,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421148169] [2022-04-06 18:48:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:25,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:48:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:25,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:25,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421148169] [2022-04-06 18:48:25,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421148169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:25,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:25,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:25,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350495592] [2022-04-06 18:48:25,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350495592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:25,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:25,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011336565] [2022-04-06 18:48:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:25,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:48:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:48:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:48:25,943 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) [2022-04-06 18:48:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:27,724 INFO L93 Difference]: Finished difference Result 971 states and 1360 transitions. [2022-04-06 18:48:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:48:27,725 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 [2022-04-06 18:48:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:27,727 INFO L225 Difference]: With dead ends: 971 [2022-04-06 18:48:27,727 INFO L226 Difference]: Without dead ends: 946 [2022-04-06 18:48:27,728 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 [2022-04-06 18:48:27,728 INFO L913 BasicCegarLoop]: 633 mSDtfsCounter, 1274 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3599 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:27,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 2477 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 3599 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:48:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-04-06 18:48:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 826. [2022-04-06 18:48:27,952 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) [2022-04-06 18:48:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1117 transitions. [2022-04-06 18:48:27,953 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1117 transitions. Word has length 60 [2022-04-06 18:48:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:27,953 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1117 transitions. [2022-04-06 18:48:27,953 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) [2022-04-06 18:48:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1117 transitions. [2022-04-06 18:48:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:48:27,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:27,955 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] [2022-04-06 18:48:27,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 18:48:27,955 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 1 times [2022-04-06 18:48:27,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:27,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969531386] [2022-04-06 18:48:27,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 2 times [2022-04-06 18:48:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049733769] [2022-04-06 18:48:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:48:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:28,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049733769] [2022-04-06 18:48:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049733769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:28,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:28,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969531386] [2022-04-06 18:48:28,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969531386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:28,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:28,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430163448] [2022-04-06 18:48:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:28,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:28,081 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) [2022-04-06 18:48:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:29,686 INFO L93 Difference]: Finished difference Result 980 states and 1364 transitions. [2022-04-06 18:48:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:48:29,686 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 [2022-04-06 18:48:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:29,689 INFO L225 Difference]: With dead ends: 980 [2022-04-06 18:48:29,689 INFO L226 Difference]: Without dead ends: 948 [2022-04-06 18:48:29,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:48:29,690 INFO L913 BasicCegarLoop]: 612 mSDtfsCounter, 645 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:29,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1756 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:48:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-04-06 18:48:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 826. [2022-04-06 18:48:29,905 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) [2022-04-06 18:48:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1116 transitions. [2022-04-06 18:48:29,907 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1116 transitions. Word has length 60 [2022-04-06 18:48:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:29,907 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1116 transitions. [2022-04-06 18:48:29,907 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) [2022-04-06 18:48:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1116 transitions. [2022-04-06 18:48:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:48:29,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:29,909 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] [2022-04-06 18:48:29,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 18:48:29,909 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 1 times [2022-04-06 18:48:29,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:29,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1373845196] [2022-04-06 18:48:29,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 2 times [2022-04-06 18:48:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:29,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202885032] [2022-04-06 18:48:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:29,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:29,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:30,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:30,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:30,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:48:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:30,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:30,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202885032] [2022-04-06 18:48:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202885032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:30,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:30,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:30,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:30,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1373845196] [2022-04-06 18:48:30,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1373845196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:30,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:30,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:48:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811143783] [2022-04-06 18:48:30,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:30,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:48:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:48:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:48:30,126 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) [2022-04-06 18:48:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:32,127 INFO L93 Difference]: Finished difference Result 987 states and 1381 transitions. [2022-04-06 18:48:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:48:32,127 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 [2022-04-06 18:48:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:32,130 INFO L225 Difference]: With dead ends: 987 [2022-04-06 18:48:32,130 INFO L226 Difference]: Without dead ends: 935 [2022-04-06 18:48:32,130 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 [2022-04-06 18:48:32,131 INFO L913 BasicCegarLoop]: 627 mSDtfsCounter, 971 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:32,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 2659 Invalid, 4522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:48:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-04-06 18:48:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 818. [2022-04-06 18:48:32,350 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) [2022-04-06 18:48:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1101 transitions. [2022-04-06 18:48:32,351 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1101 transitions. Word has length 60 [2022-04-06 18:48:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:32,351 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1101 transitions. [2022-04-06 18:48:32,351 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) [2022-04-06 18:48:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1101 transitions. [2022-04-06 18:48:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 18:48:32,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:32,353 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] [2022-04-06 18:48:32,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 18:48:32,353 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 1 times [2022-04-06 18:48:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:32,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598725780] [2022-04-06 18:48:32,353 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 2 times [2022-04-06 18:48:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:32,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144346435] [2022-04-06 18:48:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:48:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144346435] [2022-04-06 18:48:32,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144346435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:32,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:32,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:32,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598725780] [2022-04-06 18:48:32,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598725780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:32,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:32,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:32,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185194068] [2022-04-06 18:48:32,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:32,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:32,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:32,513 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) [2022-04-06 18:48:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:33,853 INFO L93 Difference]: Finished difference Result 983 states and 1382 transitions. [2022-04-06 18:48:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:48:33,853 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 [2022-04-06 18:48:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:33,856 INFO L225 Difference]: With dead ends: 983 [2022-04-06 18:48:33,856 INFO L226 Difference]: Without dead ends: 949 [2022-04-06 18:48:33,857 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 [2022-04-06 18:48:33,857 INFO L913 BasicCegarLoop]: 593 mSDtfsCounter, 654 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:33,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1481 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-04-06 18:48:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 822. [2022-04-06 18:48:34,066 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) [2022-04-06 18:48:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1119 transitions. [2022-04-06 18:48:34,068 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1119 transitions. Word has length 61 [2022-04-06 18:48:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:34,068 INFO L478 AbstractCegarLoop]: Abstraction has 822 states and 1119 transitions. [2022-04-06 18:48:34,068 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) [2022-04-06 18:48:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1119 transitions. [2022-04-06 18:48:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:48:34,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:34,070 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] [2022-04-06 18:48:34,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 18:48:34,070 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 1 times [2022-04-06 18:48:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:34,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725374948] [2022-04-06 18:48:34,070 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 2 times [2022-04-06 18:48:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:34,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990553609] [2022-04-06 18:48:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:48:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:34,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990553609] [2022-04-06 18:48:34,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990553609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:34,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:34,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:34,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:34,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725374948] [2022-04-06 18:48:34,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725374948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:34,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:34,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893033414] [2022-04-06 18:48:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:34,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:48:34,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:48:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:48:34,366 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) [2022-04-06 18:48:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:37,264 INFO L93 Difference]: Finished difference Result 961 states and 1352 transitions. [2022-04-06 18:48:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:48:37,265 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 [2022-04-06 18:48:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:37,267 INFO L225 Difference]: With dead ends: 961 [2022-04-06 18:48:37,267 INFO L226 Difference]: Without dead ends: 937 [2022-04-06 18:48:37,268 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 [2022-04-06 18:48:37,268 INFO L913 BasicCegarLoop]: 592 mSDtfsCounter, 1489 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 5392 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:37,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 3154 Invalid, 6008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 5392 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 18:48:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-04-06 18:48:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2022-04-06 18:48:37,482 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) [2022-04-06 18:48:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1115 transitions. [2022-04-06 18:48:37,484 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1115 transitions. Word has length 63 [2022-04-06 18:48:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:37,484 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1115 transitions. [2022-04-06 18:48:37,484 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) [2022-04-06 18:48:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1115 transitions. [2022-04-06 18:48:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:48:37,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:37,486 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] [2022-04-06 18:48:37,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 18:48:37,486 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 1 times [2022-04-06 18:48:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298819053] [2022-04-06 18:48:37,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 2 times [2022-04-06 18:48:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:37,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077641032] [2022-04-06 18:48:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:48:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:37,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077641032] [2022-04-06 18:48:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077641032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:48:37,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298819053] [2022-04-06 18:48:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298819053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:48:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278978761] [2022-04-06 18:48:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:37,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:48:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:48:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:48:37,765 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) [2022-04-06 18:48:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:40,361 INFO L93 Difference]: Finished difference Result 961 states and 1350 transitions. [2022-04-06 18:48:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:48:40,361 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 [2022-04-06 18:48:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:40,370 INFO L225 Difference]: With dead ends: 961 [2022-04-06 18:48:40,371 INFO L226 Difference]: Without dead ends: 936 [2022-04-06 18:48:40,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:48:40,374 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 1517 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 5495 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:40,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 3383 Invalid, 6121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 5495 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:48:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-04-06 18:48:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 818. [2022-04-06 18:48:40,633 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) [2022-04-06 18:48:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1111 transitions. [2022-04-06 18:48:40,635 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1111 transitions. Word has length 66 [2022-04-06 18:48:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:40,635 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1111 transitions. [2022-04-06 18:48:40,635 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) [2022-04-06 18:48:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1111 transitions. [2022-04-06 18:48:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:48:40,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:40,636 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] [2022-04-06 18:48:40,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 18:48:40,637 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 1 times [2022-04-06 18:48:40,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1582251955] [2022-04-06 18:48:40,637 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 2 times [2022-04-06 18:48:40,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706193732] [2022-04-06 18:48:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 18:48:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706193732] [2022-04-06 18:48:40,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706193732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:40,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1582251955] [2022-04-06 18:48:40,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1582251955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:48:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608815404] [2022-04-06 18:48:40,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:40,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:48:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:48:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:48:40,865 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) [2022-04-06 18:48:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:43,934 INFO L93 Difference]: Finished difference Result 958 states and 1343 transitions. [2022-04-06 18:48:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:48:43,934 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 [2022-04-06 18:48:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:43,937 INFO L225 Difference]: With dead ends: 958 [2022-04-06 18:48:43,937 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 18:48:43,937 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 [2022-04-06 18:48:43,938 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, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:43,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 2936 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 5649 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 18:48:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 18:48:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 816. [2022-04-06 18:48:44,175 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) [2022-04-06 18:48:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1107 transitions. [2022-04-06 18:48:44,177 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1107 transitions. Word has length 62 [2022-04-06 18:48:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:44,177 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1107 transitions. [2022-04-06 18:48:44,177 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) [2022-04-06 18:48:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1107 transitions. [2022-04-06 18:48:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:48:44,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:44,178 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] [2022-04-06 18:48:44,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-06 18:48:44,179 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 1 times [2022-04-06 18:48:44,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:44,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503538607] [2022-04-06 18:48:44,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 2 times [2022-04-06 18:48:44,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:44,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272763467] [2022-04-06 18:48:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272763467] [2022-04-06 18:48:44,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272763467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:44,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:44,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:48:44,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503538607] [2022-04-06 18:48:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503538607] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:44,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:44,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:48:44,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288928125] [2022-04-06 18:48:44,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:44,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:48:44,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:48:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:48:44,431 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) [2022-04-06 18:48:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:46,816 INFO L93 Difference]: Finished difference Result 949 states and 1332 transitions. [2022-04-06 18:48:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:48:46,817 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 [2022-04-06 18:48:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:46,820 INFO L225 Difference]: With dead ends: 949 [2022-04-06 18:48:46,820 INFO L226 Difference]: Without dead ends: 927 [2022-04-06 18:48:46,821 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 [2022-04-06 18:48:46,824 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 600 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 5198 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:46,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 3046 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 5198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:48:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-04-06 18:48:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 811. [2022-04-06 18:48:47,082 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) [2022-04-06 18:48:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1100 transitions. [2022-04-06 18:48:47,083 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1100 transitions. Word has length 62 [2022-04-06 18:48:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:47,083 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1100 transitions. [2022-04-06 18:48:47,084 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) [2022-04-06 18:48:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1100 transitions. [2022-04-06 18:48:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:48:47,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:47,085 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] [2022-04-06 18:48:47,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-06 18:48:47,085 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 1 times [2022-04-06 18:48:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908168225] [2022-04-06 18:48:47,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 2 times [2022-04-06 18:48:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514042143] [2022-04-06 18:48:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:48:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:47,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514042143] [2022-04-06 18:48:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514042143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:47,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:47,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:47,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908168225] [2022-04-06 18:48:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908168225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:47,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:47,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:48:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518201801] [2022-04-06 18:48:47,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:47,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:48:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:48:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:48:47,239 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) [2022-04-06 18:48:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:48,388 INFO L93 Difference]: Finished difference Result 1144 states and 1570 transitions. [2022-04-06 18:48:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:48,389 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 [2022-04-06 18:48:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:48,391 INFO L225 Difference]: With dead ends: 1144 [2022-04-06 18:48:48,391 INFO L226 Difference]: Without dead ends: 812 [2022-04-06 18:48:48,392 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 [2022-04-06 18:48:48,393 INFO L913 BasicCegarLoop]: 523 mSDtfsCounter, 909 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:48,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 884 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:48:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-04-06 18:48:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 703. [2022-04-06 18:48:48,623 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) [2022-04-06 18:48:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 921 transitions. [2022-04-06 18:48:48,624 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 921 transitions. Word has length 63 [2022-04-06 18:48:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:48,624 INFO L478 AbstractCegarLoop]: Abstraction has 703 states and 921 transitions. [2022-04-06 18:48:48,624 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) [2022-04-06 18:48:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 921 transitions. [2022-04-06 18:48:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:48:48,625 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:48,625 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] [2022-04-06 18:48:48,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-06 18:48:48,626 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 1 times [2022-04-06 18:48:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:48,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [668359418] [2022-04-06 18:48:48,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 2 times [2022-04-06 18:48:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:48,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7280917] [2022-04-06 18:48:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:48:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7280917] [2022-04-06 18:48:48,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7280917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:48,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:48,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:48:48,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [668359418] [2022-04-06 18:48:48,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [668359418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:48,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:48,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:48:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667874241] [2022-04-06 18:48:48,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:48,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:48:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:48:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:48:48,868 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) [2022-04-06 18:48:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:51,024 INFO L93 Difference]: Finished difference Result 780 states and 1034 transitions. [2022-04-06 18:48:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:48:51,024 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 [2022-04-06 18:48:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:51,026 INFO L225 Difference]: With dead ends: 780 [2022-04-06 18:48:51,026 INFO L226 Difference]: Without dead ends: 758 [2022-04-06 18:48:51,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:48:51,027 INFO L913 BasicCegarLoop]: 525 mSDtfsCounter, 841 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:51,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2683 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:48:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-04-06 18:48:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 698. [2022-04-06 18:48:51,240 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) [2022-04-06 18:48:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 914 transitions. [2022-04-06 18:48:51,241 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 914 transitions. Word has length 63 [2022-04-06 18:48:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:51,242 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 914 transitions. [2022-04-06 18:48:51,242 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) [2022-04-06 18:48:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 914 transitions. [2022-04-06 18:48:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:48:51,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:51,243 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] [2022-04-06 18:48:51,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-06 18:48:51,243 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 1 times [2022-04-06 18:48:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122367405] [2022-04-06 18:48:51,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 2 times [2022-04-06 18:48:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18732595] [2022-04-06 18:48:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 18:48:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:48:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18732595] [2022-04-06 18:48:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18732595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:51,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122367405] [2022-04-06 18:48:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122367405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943746591] [2022-04-06 18:48:51,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:51,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:48:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:48:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:48:51,359 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) [2022-04-06 18:48:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:52,736 INFO L93 Difference]: Finished difference Result 971 states and 1279 transitions. [2022-04-06 18:48:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:52,736 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 [2022-04-06 18:48:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:52,738 INFO L225 Difference]: With dead ends: 971 [2022-04-06 18:48:52,738 INFO L226 Difference]: Without dead ends: 834 [2022-04-06 18:48:52,739 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 [2022-04-06 18:48:52,739 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:52,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1065 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:48:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-06 18:48:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 717. [2022-04-06 18:48:52,946 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) [2022-04-06 18:48:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 928 transitions. [2022-04-06 18:48:52,947 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 928 transitions. Word has length 67 [2022-04-06 18:48:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:52,948 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 928 transitions. [2022-04-06 18:48:52,948 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) [2022-04-06 18:48:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 928 transitions. [2022-04-06 18:48:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:48:52,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:52,949 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] [2022-04-06 18:48:52,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-06 18:48:52,950 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 1 times [2022-04-06 18:48:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:52,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769498028] [2022-04-06 18:48:52,950 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 2 times [2022-04-06 18:48:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:52,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255056212] [2022-04-06 18:48:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:48:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:48:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:53,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:53,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255056212] [2022-04-06 18:48:53,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255056212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:53,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769498028] [2022-04-06 18:48:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769498028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:53,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462270139] [2022-04-06 18:48:53,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:53,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:48:53,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:48:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:48:53,104 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) [2022-04-06 18:48:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:54,440 INFO L93 Difference]: Finished difference Result 908 states and 1199 transitions. [2022-04-06 18:48:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:48:54,441 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 [2022-04-06 18:48:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:54,443 INFO L225 Difference]: With dead ends: 908 [2022-04-06 18:48:54,443 INFO L226 Difference]: Without dead ends: 788 [2022-04-06 18:48:54,443 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 [2022-04-06 18:48:54,443 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 [2022-04-06 18:48:54,444 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] [2022-04-06 18:48:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-04-06 18:48:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 717. [2022-04-06 18:48:54,671 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) [2022-04-06 18:48:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 925 transitions. [2022-04-06 18:48:54,672 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 925 transitions. Word has length 66 [2022-04-06 18:48:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:54,672 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 925 transitions. [2022-04-06 18:48:54,673 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) [2022-04-06 18:48:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 925 transitions. [2022-04-06 18:48:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 18:48:54,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:54,674 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] [2022-04-06 18:48:54,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-06 18:48:54,674 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 1 times [2022-04-06 18:48:54,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:54,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288357271] [2022-04-06 18:48:54,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 2 times [2022-04-06 18:48:54,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:54,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145244726] [2022-04-06 18:48:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:48:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:54,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145244726] [2022-04-06 18:48:54,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145244726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:54,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:54,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:54,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288357271] [2022-04-06 18:48:54,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288357271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:54,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:54,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:54,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956562194] [2022-04-06 18:48:54,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:54,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:54,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:54,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:54,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:54,860 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) [2022-04-06 18:48:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:56,342 INFO L93 Difference]: Finished difference Result 852 states and 1114 transitions. [2022-04-06 18:48:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:48:56,343 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 [2022-04-06 18:48:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:56,350 INFO L225 Difference]: With dead ends: 852 [2022-04-06 18:48:56,350 INFO L226 Difference]: Without dead ends: 819 [2022-04-06 18:48:56,351 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 [2022-04-06 18:48:56,356 INFO L913 BasicCegarLoop]: 502 mSDtfsCounter, 1601 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:56,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 1355 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:48:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-06 18:48:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 723. [2022-04-06 18:48:56,572 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) [2022-04-06 18:48:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 933 transitions. [2022-04-06 18:48:56,574 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 933 transitions. Word has length 65 [2022-04-06 18:48:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:56,574 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 933 transitions. [2022-04-06 18:48:56,574 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) [2022-04-06 18:48:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 933 transitions. [2022-04-06 18:48:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:48:56,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:56,575 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] [2022-04-06 18:48:56,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-06 18:48:56,575 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 1 times [2022-04-06 18:48:56,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35232308] [2022-04-06 18:48:56,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 2 times [2022-04-06 18:48:56,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586661731] [2022-04-06 18:48:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:56,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:48:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:48:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586661731] [2022-04-06 18:48:56,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586661731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:56,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:56,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:48:56,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35232308] [2022-04-06 18:48:56,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35232308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:56,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:56,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:48:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827389974] [2022-04-06 18:48:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:56,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:48:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:48:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:48:56,837 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) [2022-04-06 18:48:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:59,189 INFO L93 Difference]: Finished difference Result 816 states and 1069 transitions. [2022-04-06 18:48:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:48:59,189 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 [2022-04-06 18:48:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:59,191 INFO L225 Difference]: With dead ends: 816 [2022-04-06 18:48:59,191 INFO L226 Difference]: Without dead ends: 791 [2022-04-06 18:48:59,192 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 [2022-04-06 18:48:59,193 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, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:59,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 2871 Invalid, 5968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5323 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:48:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-06 18:48:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 721. [2022-04-06 18:48:59,419 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) [2022-04-06 18:48:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 929 transitions. [2022-04-06 18:48:59,420 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 929 transitions. Word has length 67 [2022-04-06 18:48:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:59,420 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 929 transitions. [2022-04-06 18:48:59,420 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) [2022-04-06 18:48:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 929 transitions. [2022-04-06 18:48:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:48:59,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:59,421 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] [2022-04-06 18:48:59,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-06 18:48:59,421 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 1 times [2022-04-06 18:48:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [982439301] [2022-04-06 18:48:59,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 2 times [2022-04-06 18:48:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019789581] [2022-04-06 18:48:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:48:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:48:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019789581] [2022-04-06 18:48:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019789581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [982439301] [2022-04-06 18:48:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [982439301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653402545] [2022-04-06 18:48:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:59,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:59,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:59,569 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) [2022-04-06 18:49:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:01,009 INFO L93 Difference]: Finished difference Result 847 states and 1100 transitions. [2022-04-06 18:49:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:01,009 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 [2022-04-06 18:49:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:01,011 INFO L225 Difference]: With dead ends: 847 [2022-04-06 18:49:01,011 INFO L226 Difference]: Without dead ends: 793 [2022-04-06 18:49:01,012 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 [2022-04-06 18:49:01,014 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 591 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:01,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1527 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:49:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-04-06 18:49:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 721. [2022-04-06 18:49:01,236 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) [2022-04-06 18:49:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 927 transitions. [2022-04-06 18:49:01,237 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 927 transitions. Word has length 66 [2022-04-06 18:49:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:01,237 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 927 transitions. [2022-04-06 18:49:01,237 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) [2022-04-06 18:49:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 927 transitions. [2022-04-06 18:49:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:01,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:01,239 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] [2022-04-06 18:49:01,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-06 18:49:01,239 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 1 times [2022-04-06 18:49:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:01,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371388225] [2022-04-06 18:49:01,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 2 times [2022-04-06 18:49:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:01,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373887324] [2022-04-06 18:49:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:49:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:01,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373887324] [2022-04-06 18:49:01,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373887324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:01,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:01,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:01,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371388225] [2022-04-06 18:49:01,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371388225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:01,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:01,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999159294] [2022-04-06 18:49:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:01,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:01,439 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) [2022-04-06 18:49:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:03,237 INFO L93 Difference]: Finished difference Result 818 states and 1067 transitions. [2022-04-06 18:49:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:49:03,237 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 [2022-04-06 18:49:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:03,239 INFO L225 Difference]: With dead ends: 818 [2022-04-06 18:49:03,239 INFO L226 Difference]: Without dead ends: 741 [2022-04-06 18:49:03,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:03,240 INFO L913 BasicCegarLoop]: 508 mSDtfsCounter, 922 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 3398 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:03,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1875 Invalid, 3746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3398 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:49:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-04-06 18:49:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 684. [2022-04-06 18:49:03,458 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) [2022-04-06 18:49:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 866 transitions. [2022-04-06 18:49:03,459 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 866 transitions. Word has length 66 [2022-04-06 18:49:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:03,459 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 866 transitions. [2022-04-06 18:49:03,459 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) [2022-04-06 18:49:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 866 transitions. [2022-04-06 18:49:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:49:03,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:03,460 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] [2022-04-06 18:49:03,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-06 18:49:03,461 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 1 times [2022-04-06 18:49:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [49909550] [2022-04-06 18:49:03,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 2 times [2022-04-06 18:49:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359806508] [2022-04-06 18:49:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 18:49:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:03,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:03,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359806508] [2022-04-06 18:49:03,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359806508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:03,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:03,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:03,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:03,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [49909550] [2022-04-06 18:49:03,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [49909550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:03,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:03,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977939543] [2022-04-06 18:49:03,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:03,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:03,613 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) [2022-04-06 18:49:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:04,916 INFO L93 Difference]: Finished difference Result 769 states and 981 transitions. [2022-04-06 18:49:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:04,917 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 [2022-04-06 18:49:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:04,918 INFO L225 Difference]: With dead ends: 769 [2022-04-06 18:49:04,918 INFO L226 Difference]: Without dead ends: 730 [2022-04-06 18:49:04,921 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 [2022-04-06 18:49:04,921 INFO L913 BasicCegarLoop]: 451 mSDtfsCounter, 523 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:04,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1210 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:49:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-04-06 18:49:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 679. [2022-04-06 18:49:05,107 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) [2022-04-06 18:49:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 859 transitions. [2022-04-06 18:49:05,108 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 859 transitions. Word has length 67 [2022-04-06 18:49:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:05,108 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 859 transitions. [2022-04-06 18:49:05,108 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) [2022-04-06 18:49:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 859 transitions. [2022-04-06 18:49:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:49:05,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:05,109 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] [2022-04-06 18:49:05,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-06 18:49:05,109 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 1 times [2022-04-06 18:49:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871397583] [2022-04-06 18:49:05,110 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 2 times [2022-04-06 18:49:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824435626] [2022-04-06 18:49:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:05,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:05,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824435626] [2022-04-06 18:49:05,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824435626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:05,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:05,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:05,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:05,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871397583] [2022-04-06 18:49:05,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871397583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:05,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:05,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453005613] [2022-04-06 18:49:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:05,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:05,253 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) [2022-04-06 18:49:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:06,477 INFO L93 Difference]: Finished difference Result 848 states and 1087 transitions. [2022-04-06 18:49:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:06,478 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 [2022-04-06 18:49:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:06,480 INFO L225 Difference]: With dead ends: 848 [2022-04-06 18:49:06,480 INFO L226 Difference]: Without dead ends: 836 [2022-04-06 18:49:06,480 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 [2022-04-06 18:49:06,480 INFO L913 BasicCegarLoop]: 470 mSDtfsCounter, 712 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-04-06 18:49:06,481 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] [2022-04-06 18:49:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-04-06 18:49:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 725. [2022-04-06 18:49:06,698 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) [2022-04-06 18:49:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 911 transitions. [2022-04-06 18:49:06,700 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 911 transitions. Word has length 67 [2022-04-06 18:49:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:06,700 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 911 transitions. [2022-04-06 18:49:06,700 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) [2022-04-06 18:49:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 911 transitions. [2022-04-06 18:49:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 18:49:06,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:06,701 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] [2022-04-06 18:49:06,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-06 18:49:06,701 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 1 times [2022-04-06 18:49:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741664391] [2022-04-06 18:49:06,706 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 2 times [2022-04-06 18:49:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:06,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820579373] [2022-04-06 18:49:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:06,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820579373] [2022-04-06 18:49:06,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820579373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:06,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741664391] [2022-04-06 18:49:06,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741664391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:06,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702539251] [2022-04-06 18:49:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:06,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:06,861 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) [2022-04-06 18:49:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:08,643 INFO L93 Difference]: Finished difference Result 842 states and 1076 transitions. [2022-04-06 18:49:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:08,644 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 [2022-04-06 18:49:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:08,645 INFO L225 Difference]: With dead ends: 842 [2022-04-06 18:49:08,645 INFO L226 Difference]: Without dead ends: 833 [2022-04-06 18:49:08,646 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 [2022-04-06 18:49:08,647 INFO L913 BasicCegarLoop]: 472 mSDtfsCounter, 1726 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:08,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1046 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:49:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-04-06 18:49:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 725. [2022-04-06 18:49:08,916 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) [2022-04-06 18:49:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 909 transitions. [2022-04-06 18:49:08,918 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 909 transitions. Word has length 68 [2022-04-06 18:49:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:08,918 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 909 transitions. [2022-04-06 18:49:08,918 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) [2022-04-06 18:49:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 909 transitions. [2022-04-06 18:49:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 18:49:08,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:08,919 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] [2022-04-06 18:49:08,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-06 18:49:08,920 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 1 times [2022-04-06 18:49:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:08,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247513597] [2022-04-06 18:49:08,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 2 times [2022-04-06 18:49:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:08,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812740516] [2022-04-06 18:49:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:08,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812740516] [2022-04-06 18:49:09,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812740516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:09,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247513597] [2022-04-06 18:49:09,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247513597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:09,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878829806] [2022-04-06 18:49:09,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:09,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:49:09,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:49:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:09,265 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) [2022-04-06 18:49:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:11,626 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2022-04-06 18:49:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:49:11,626 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 [2022-04-06 18:49:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:11,644 INFO L225 Difference]: With dead ends: 816 [2022-04-06 18:49:11,644 INFO L226 Difference]: Without dead ends: 791 [2022-04-06 18:49:11,645 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 [2022-04-06 18:49:11,645 INFO L913 BasicCegarLoop]: 458 mSDtfsCounter, 787 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 4942 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:11,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2724 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4942 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:49:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-06 18:49:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 723. [2022-04-06 18:49:11,880 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) [2022-04-06 18:49:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 905 transitions. [2022-04-06 18:49:11,881 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 905 transitions. Word has length 74 [2022-04-06 18:49:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:11,881 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 905 transitions. [2022-04-06 18:49:11,881 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) [2022-04-06 18:49:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 905 transitions. [2022-04-06 18:49:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 18:49:11,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:11,883 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] [2022-04-06 18:49:11,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-06 18:49:11,883 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 1 times [2022-04-06 18:49:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997073760] [2022-04-06 18:49:11,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 2 times [2022-04-06 18:49:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:11,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105001536] [2022-04-06 18:49:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:49:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:49:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:12,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:12,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105001536] [2022-04-06 18:49:12,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105001536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:12,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:12,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:12,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:12,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997073760] [2022-04-06 18:49:12,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997073760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:12,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:49:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674557003] [2022-04-06 18:49:12,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:12,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:49:12,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:49:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:49:12,200 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) [2022-04-06 18:49:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:14,127 INFO L93 Difference]: Finished difference Result 797 states and 1008 transitions. [2022-04-06 18:49:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:49:14,128 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 [2022-04-06 18:49:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:14,130 INFO L225 Difference]: With dead ends: 797 [2022-04-06 18:49:14,130 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 18:49:14,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 18:49:14,131 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1479 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 4839 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:14,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 2695 Invalid, 5399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 4839 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:49:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 18:49:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 720. [2022-04-06 18:49:14,360 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) [2022-04-06 18:49:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 900 transitions. [2022-04-06 18:49:14,361 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 900 transitions. Word has length 70 [2022-04-06 18:49:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:14,361 INFO L478 AbstractCegarLoop]: Abstraction has 720 states and 900 transitions. [2022-04-06 18:49:14,361 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) [2022-04-06 18:49:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 900 transitions. [2022-04-06 18:49:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 18:49:14,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:14,363 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] [2022-04-06 18:49:14,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-04-06 18:49:14,363 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 1 times [2022-04-06 18:49:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:14,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [253907882] [2022-04-06 18:49:14,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 2 times [2022-04-06 18:49:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:14,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989065491] [2022-04-06 18:49:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:49:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989065491] [2022-04-06 18:49:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989065491] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:14,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [253907882] [2022-04-06 18:49:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [253907882] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332409432] [2022-04-06 18:49:14,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:14,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:49:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:49:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:14,620 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) [2022-04-06 18:49:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:16,319 INFO L93 Difference]: Finished difference Result 790 states and 998 transitions. [2022-04-06 18:49:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:49:16,320 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 [2022-04-06 18:49:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:16,321 INFO L225 Difference]: With dead ends: 790 [2022-04-06 18:49:16,321 INFO L226 Difference]: Without dead ends: 768 [2022-04-06 18:49:16,322 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 [2022-04-06 18:49:16,322 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 467 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:16,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2339 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:49:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-04-06 18:49:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2022-04-06 18:49:16,528 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) [2022-04-06 18:49:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2022-04-06 18:49:16,529 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 72 [2022-04-06 18:49:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:16,529 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2022-04-06 18:49:16,529 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) [2022-04-06 18:49:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2022-04-06 18:49:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:16,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:16,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:16,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-04-06 18:49:16,531 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 1 times [2022-04-06 18:49:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:16,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2078805784] [2022-04-06 18:49:16,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 2 times [2022-04-06 18:49:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:16,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497948348] [2022-04-06 18:49:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:16,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497948348] [2022-04-06 18:49:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497948348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:16,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:16,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2078805784] [2022-04-06 18:49:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2078805784] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:16,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698298074] [2022-04-06 18:49:16,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:16,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:49:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:49:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:16,814 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) [2022-04-06 18:49:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:18,463 INFO L93 Difference]: Finished difference Result 785 states and 991 transitions. [2022-04-06 18:49:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:49:18,463 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 [2022-04-06 18:49:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:18,465 INFO L225 Difference]: With dead ends: 785 [2022-04-06 18:49:18,465 INFO L226 Difference]: Without dead ends: 754 [2022-04-06 18:49:18,465 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 [2022-04-06 18:49:18,466 INFO L913 BasicCegarLoop]: 440 mSDtfsCounter, 239 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:18,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2240 Invalid, 4537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:49:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-04-06 18:49:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 706. [2022-04-06 18:49:18,687 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) [2022-04-06 18:49:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 880 transitions. [2022-04-06 18:49:18,689 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 880 transitions. Word has length 69 [2022-04-06 18:49:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:18,690 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 880 transitions. [2022-04-06 18:49:18,690 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) [2022-04-06 18:49:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 880 transitions. [2022-04-06 18:49:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:18,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:18,691 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] [2022-04-06 18:49:18,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-04-06 18:49:18,691 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 1 times [2022-04-06 18:49:18,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190991658] [2022-04-06 18:49:18,691 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 2 times [2022-04-06 18:49:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999455589] [2022-04-06 18:49:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999455589] [2022-04-06 18:49:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999455589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:18,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:18,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:18,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190991658] [2022-04-06 18:49:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190991658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:18,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:18,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424989462] [2022-04-06 18:49:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:18,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:18,831 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) [2022-04-06 18:49:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:20,155 INFO L93 Difference]: Finished difference Result 788 states and 988 transitions. [2022-04-06 18:49:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:20,155 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 [2022-04-06 18:49:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:20,157 INFO L225 Difference]: With dead ends: 788 [2022-04-06 18:49:20,157 INFO L226 Difference]: Without dead ends: 749 [2022-04-06 18:49:20,157 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 [2022-04-06 18:49:20,158 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 [2022-04-06 18:49:20,158 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] [2022-04-06 18:49:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-04-06 18:49:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 701. [2022-04-06 18:49:20,361 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) [2022-04-06 18:49:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 873 transitions. [2022-04-06 18:49:20,362 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 873 transitions. Word has length 69 [2022-04-06 18:49:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:20,362 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 873 transitions. [2022-04-06 18:49:20,362 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) [2022-04-06 18:49:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 873 transitions. [2022-04-06 18:49:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:20,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:20,363 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] [2022-04-06 18:49:20,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-04-06 18:49:20,363 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 1 times [2022-04-06 18:49:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107748860] [2022-04-06 18:49:20,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 2 times [2022-04-06 18:49:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744228423] [2022-04-06 18:49:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:20,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:49:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744228423] [2022-04-06 18:49:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744228423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:20,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107748860] [2022-04-06 18:49:20,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107748860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258461580] [2022-04-06 18:49:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:20,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:49:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:49:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:49:20,594 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) [2022-04-06 18:49:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:22,104 INFO L93 Difference]: Finished difference Result 776 states and 976 transitions. [2022-04-06 18:49:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:49:22,105 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 [2022-04-06 18:49:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:22,107 INFO L225 Difference]: With dead ends: 776 [2022-04-06 18:49:22,107 INFO L226 Difference]: Without dead ends: 746 [2022-04-06 18:49:22,107 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 [2022-04-06 18:49:22,107 INFO L913 BasicCegarLoop]: 435 mSDtfsCounter, 705 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:22,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 2058 Invalid, 3402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:49:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-04-06 18:49:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 698. [2022-04-06 18:49:22,322 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) [2022-04-06 18:49:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 868 transitions. [2022-04-06 18:49:22,323 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 868 transitions. Word has length 69 [2022-04-06 18:49:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:22,323 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 868 transitions. [2022-04-06 18:49:22,323 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) [2022-04-06 18:49:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 868 transitions. [2022-04-06 18:49:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:22,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:22,324 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] [2022-04-06 18:49:22,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-04-06 18:49:22,324 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 1 times [2022-04-06 18:49:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816498889] [2022-04-06 18:49:22,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 2 times [2022-04-06 18:49:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247936915] [2022-04-06 18:49:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247936915] [2022-04-06 18:49:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247936915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:22,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816498889] [2022-04-06 18:49:22,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816498889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125944487] [2022-04-06 18:49:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:22,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:49:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:49:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:49:22,538 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) [2022-04-06 18:49:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:24,081 INFO L93 Difference]: Finished difference Result 756 states and 950 transitions. [2022-04-06 18:49:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 18:49:24,081 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 [2022-04-06 18:49:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:24,083 INFO L225 Difference]: With dead ends: 756 [2022-04-06 18:49:24,083 INFO L226 Difference]: Without dead ends: 750 [2022-04-06 18:49:24,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-04-06 18:49:24,083 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 789 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:24,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1669 Invalid, 4020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:49:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-04-06 18:49:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 695. [2022-04-06 18:49:24,286 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) [2022-04-06 18:49:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 861 transitions. [2022-04-06 18:49:24,286 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 861 transitions. Word has length 69 [2022-04-06 18:49:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:24,287 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 861 transitions. [2022-04-06 18:49:24,287 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) [2022-04-06 18:49:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 861 transitions. [2022-04-06 18:49:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:24,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:24,288 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] [2022-04-06 18:49:24,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-04-06 18:49:24,288 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 1 times [2022-04-06 18:49:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1337723455] [2022-04-06 18:49:24,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 2 times [2022-04-06 18:49:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:24,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699613964] [2022-04-06 18:49:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:24,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699613964] [2022-04-06 18:49:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699613964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:24,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:24,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:24,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1337723455] [2022-04-06 18:49:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1337723455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:24,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:24,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217895196] [2022-04-06 18:49:24,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:24,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:24,460 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) [2022-04-06 18:49:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:26,054 INFO L93 Difference]: Finished difference Result 805 states and 1014 transitions. [2022-04-06 18:49:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:49:26,054 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 [2022-04-06 18:49:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:26,056 INFO L225 Difference]: With dead ends: 805 [2022-04-06 18:49:26,056 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 18:49:26,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:49:26,056 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:26,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 925 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:49:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 18:49:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 666. [2022-04-06 18:49:26,265 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) [2022-04-06 18:49:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 825 transitions. [2022-04-06 18:49:26,266 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 825 transitions. Word has length 69 [2022-04-06 18:49:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:26,266 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 825 transitions. [2022-04-06 18:49:26,274 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) [2022-04-06 18:49:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 825 transitions. [2022-04-06 18:49:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:49:26,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:26,275 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] [2022-04-06 18:49:26,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-04-06 18:49:26,276 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 1 times [2022-04-06 18:49:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:26,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201329668] [2022-04-06 18:49:26,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 2 times [2022-04-06 18:49:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:26,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875517013] [2022-04-06 18:49:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:26,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:26,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875517013] [2022-04-06 18:49:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875517013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:26,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:26,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201329668] [2022-04-06 18:49:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201329668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:26,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643670402] [2022-04-06 18:49:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:26,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:26,447 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) [2022-04-06 18:49:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:27,500 INFO L93 Difference]: Finished difference Result 740 states and 928 transitions. [2022-04-06 18:49:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:27,500 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 [2022-04-06 18:49:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:27,501 INFO L225 Difference]: With dead ends: 740 [2022-04-06 18:49:27,501 INFO L226 Difference]: Without dead ends: 700 [2022-04-06 18:49:27,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:27,502 INFO L913 BasicCegarLoop]: 431 mSDtfsCounter, 608 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:27,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 821 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-04-06 18:49:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-04-06 18:49:27,700 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) [2022-04-06 18:49:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 800 transitions. [2022-04-06 18:49:27,701 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 800 transitions. Word has length 69 [2022-04-06 18:49:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:27,701 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 800 transitions. [2022-04-06 18:49:27,702 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) [2022-04-06 18:49:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 800 transitions. [2022-04-06 18:49:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:49:27,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:27,703 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] [2022-04-06 18:49:27,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-04-06 18:49:27,703 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 1 times [2022-04-06 18:49:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1683511815] [2022-04-06 18:49:27,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 2 times [2022-04-06 18:49:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023995358] [2022-04-06 18:49:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:49:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:49:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:27,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:27,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023995358] [2022-04-06 18:49:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023995358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:27,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:27,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1683511815] [2022-04-06 18:49:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1683511815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:27,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:27,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622589892] [2022-04-06 18:49:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:27,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:27,872 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) [2022-04-06 18:49:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:29,197 INFO L93 Difference]: Finished difference Result 738 states and 917 transitions. [2022-04-06 18:49:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:49:29,198 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 [2022-04-06 18:49:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:29,199 INFO L225 Difference]: With dead ends: 738 [2022-04-06 18:49:29,199 INFO L226 Difference]: Without dead ends: 700 [2022-04-06 18:49:29,200 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 [2022-04-06 18:49:29,200 INFO L913 BasicCegarLoop]: 419 mSDtfsCounter, 273 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:29,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1251 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:49:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-04-06 18:49:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-04-06 18:49:29,398 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) [2022-04-06 18:49:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 799 transitions. [2022-04-06 18:49:29,399 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 799 transitions. Word has length 71 [2022-04-06 18:49:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:29,399 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 799 transitions. [2022-04-06 18:49:29,399 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) [2022-04-06 18:49:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 799 transitions. [2022-04-06 18:49:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:49:29,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:29,400 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] [2022-04-06 18:49:29,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-04-06 18:49:29,400 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 1 times [2022-04-06 18:49:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:29,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187002013] [2022-04-06 18:49:29,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 2 times [2022-04-06 18:49:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:29,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934257633] [2022-04-06 18:49:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:49:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:49:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:29,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934257633] [2022-04-06 18:49:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934257633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:29,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:29,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:29,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187002013] [2022-04-06 18:49:29,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187002013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:29,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:29,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:29,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145287200] [2022-04-06 18:49:29,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:29,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:49:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:49:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:29,660 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) [2022-04-06 18:49:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:31,649 INFO L93 Difference]: Finished difference Result 736 states and 923 transitions. [2022-04-06 18:49:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:49:31,650 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 [2022-04-06 18:49:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:31,651 INFO L225 Difference]: With dead ends: 736 [2022-04-06 18:49:31,651 INFO L226 Difference]: Without dead ends: 698 [2022-04-06 18:49:31,651 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 [2022-04-06 18:49:31,652 INFO L913 BasicCegarLoop]: 429 mSDtfsCounter, 936 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:31,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2451 Invalid, 4331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3986 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:49:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-04-06 18:49:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 643. [2022-04-06 18:49:31,851 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) [2022-04-06 18:49:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 789 transitions. [2022-04-06 18:49:31,852 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 789 transitions. Word has length 71 [2022-04-06 18:49:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:31,852 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 789 transitions. [2022-04-06 18:49:31,852 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) [2022-04-06 18:49:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 789 transitions. [2022-04-06 18:49:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:49:31,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:31,853 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, 1, 1, 1, 1] [2022-04-06 18:49:31,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-04-06 18:49:31,853 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 1 times [2022-04-06 18:49:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043455859] [2022-04-06 18:49:31,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 2 times [2022-04-06 18:49:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989111718] [2022-04-06 18:49:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:31,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:49:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:49:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989111718] [2022-04-06 18:49:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989111718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:32,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:32,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043455859] [2022-04-06 18:49:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043455859] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:32,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:32,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121851621] [2022-04-06 18:49:32,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:32,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:32,017 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) [2022-04-06 18:49:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:33,354 INFO L93 Difference]: Finished difference Result 731 states and 903 transitions. [2022-04-06 18:49:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:33,354 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 [2022-04-06 18:49:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:33,356 INFO L225 Difference]: With dead ends: 731 [2022-04-06 18:49:33,356 INFO L226 Difference]: Without dead ends: 687 [2022-04-06 18:49:33,356 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 [2022-04-06 18:49:33,356 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 [2022-04-06 18:49:33,356 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] [2022-04-06 18:49:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-04-06 18:49:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 637. [2022-04-06 18:49:33,557 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) [2022-04-06 18:49:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 781 transitions. [2022-04-06 18:49:33,558 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 781 transitions. Word has length 71 [2022-04-06 18:49:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:33,558 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 781 transitions. [2022-04-06 18:49:33,558 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) [2022-04-06 18:49:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 781 transitions. [2022-04-06 18:49:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:49:33,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:33,559 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] [2022-04-06 18:49:33,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-04-06 18:49:33,559 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:33,559 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 1 times [2022-04-06 18:49:33,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:33,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017095317] [2022-04-06 18:49:33,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 2 times [2022-04-06 18:49:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:33,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884169548] [2022-04-06 18:49:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:33,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884169548] [2022-04-06 18:49:33,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884169548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:33,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:33,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:33,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017095317] [2022-04-06 18:49:33,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017095317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:33,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:33,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:49:33,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255792254] [2022-04-06 18:49:33,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:33,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:49:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:49:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:49:33,811 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) [2022-04-06 18:49:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:35,191 INFO L93 Difference]: Finished difference Result 868 states and 1068 transitions. [2022-04-06 18:49:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:49:35,193 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 [2022-04-06 18:49:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:35,194 INFO L225 Difference]: With dead ends: 868 [2022-04-06 18:49:35,194 INFO L226 Difference]: Without dead ends: 729 [2022-04-06 18:49:35,195 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 [2022-04-06 18:49:35,195 INFO L913 BasicCegarLoop]: 382 mSDtfsCounter, 562 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:35,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1928 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:49:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-04-06 18:49:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 643. [2022-04-06 18:49:35,406 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) [2022-04-06 18:49:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 783 transitions. [2022-04-06 18:49:35,407 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 783 transitions. Word has length 71 [2022-04-06 18:49:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:35,407 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 783 transitions. [2022-04-06 18:49:35,407 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) [2022-04-06 18:49:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 783 transitions. [2022-04-06 18:49:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:35,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:35,408 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] [2022-04-06 18:49:35,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-04-06 18:49:35,408 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 1 times [2022-04-06 18:49:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082618933] [2022-04-06 18:49:35,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 2 times [2022-04-06 18:49:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066443091] [2022-04-06 18:49:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:49:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066443091] [2022-04-06 18:49:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066443091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:35,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:35,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:35,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082618933] [2022-04-06 18:49:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082618933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:35,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:35,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618668156] [2022-04-06 18:49:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:35,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:35,572 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) [2022-04-06 18:49:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:36,602 INFO L93 Difference]: Finished difference Result 731 states and 897 transitions. [2022-04-06 18:49:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:36,603 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 [2022-04-06 18:49:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:36,604 INFO L225 Difference]: With dead ends: 731 [2022-04-06 18:49:36,604 INFO L226 Difference]: Without dead ends: 681 [2022-04-06 18:49:36,604 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 [2022-04-06 18:49:36,604 INFO L913 BasicCegarLoop]: 399 mSDtfsCounter, 614 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:36,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1229 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-04-06 18:49:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 631. [2022-04-06 18:49:36,822 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) [2022-04-06 18:49:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 765 transitions. [2022-04-06 18:49:36,823 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 765 transitions. Word has length 73 [2022-04-06 18:49:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:36,823 INFO L478 AbstractCegarLoop]: Abstraction has 631 states and 765 transitions. [2022-04-06 18:49:36,823 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) [2022-04-06 18:49:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 765 transitions. [2022-04-06 18:49:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:36,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:36,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:36,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-04-06 18:49:36,825 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 1 times [2022-04-06 18:49:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762086223] [2022-04-06 18:49:36,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 2 times [2022-04-06 18:49:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:36,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448920183] [2022-04-06 18:49:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:36,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:37,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:49:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:37,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448920183] [2022-04-06 18:49:37,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448920183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:37,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:37,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:37,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:37,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762086223] [2022-04-06 18:49:37,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762086223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:37,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:37,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527604665] [2022-04-06 18:49:37,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:37,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:49:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:49:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:37,062 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) [2022-04-06 18:49:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:40,341 INFO L93 Difference]: Finished difference Result 1532 states and 1866 transitions. [2022-04-06 18:49:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 18:49:40,341 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 [2022-04-06 18:49:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:40,344 INFO L225 Difference]: With dead ends: 1532 [2022-04-06 18:49:40,344 INFO L226 Difference]: Without dead ends: 1385 [2022-04-06 18:49:40,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=2630, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 18:49:40,345 INFO L913 BasicCegarLoop]: 418 mSDtfsCounter, 3349 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:40,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 1381 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:49:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-04-06 18:49:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1006. [2022-04-06 18:49:40,719 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) [2022-04-06 18:49:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1235 transitions. [2022-04-06 18:49:40,721 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1235 transitions. Word has length 73 [2022-04-06 18:49:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:40,721 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1235 transitions. [2022-04-06 18:49:40,721 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) [2022-04-06 18:49:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1235 transitions. [2022-04-06 18:49:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:40,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:40,723 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] [2022-04-06 18:49:40,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-04-06 18:49:40,723 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 1 times [2022-04-06 18:49:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477244286] [2022-04-06 18:49:40,723 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 2 times [2022-04-06 18:49:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083638217] [2022-04-06 18:49:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:49:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083638217] [2022-04-06 18:49:40,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083638217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:40,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:40,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:49:40,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477244286] [2022-04-06 18:49:40,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477244286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:40,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:40,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:49:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738604600] [2022-04-06 18:49:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:40,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:49:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:49:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:49:40,922 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) [2022-04-06 18:49:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:43,475 INFO L93 Difference]: Finished difference Result 1405 states and 1720 transitions. [2022-04-06 18:49:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:49:43,475 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 [2022-04-06 18:49:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:43,478 INFO L225 Difference]: With dead ends: 1405 [2022-04-06 18:49:43,478 INFO L226 Difference]: Without dead ends: 1275 [2022-04-06 18:49:43,478 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 [2022-04-06 18:49:43,478 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1989 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:43,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1330 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:49:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-04-06 18:49:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1099. [2022-04-06 18:49:43,917 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) [2022-04-06 18:49:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1347 transitions. [2022-04-06 18:49:43,918 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1347 transitions. Word has length 73 [2022-04-06 18:49:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:43,918 INFO L478 AbstractCegarLoop]: Abstraction has 1099 states and 1347 transitions. [2022-04-06 18:49:43,918 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) [2022-04-06 18:49:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1347 transitions. [2022-04-06 18:49:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 18:49:43,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:43,920 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] [2022-04-06 18:49:43,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-04-06 18:49:43,920 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 1 times [2022-04-06 18:49:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136256157] [2022-04-06 18:49:43,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 2 times [2022-04-06 18:49:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596778856] [2022-04-06 18:49:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:49:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:44,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596778856] [2022-04-06 18:49:44,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596778856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:44,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:44,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:44,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136256157] [2022-04-06 18:49:44,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136256157] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:44,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:44,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518616753] [2022-04-06 18:49:44,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:44,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:49:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:49:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:44,208 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) [2022-04-06 18:49:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:46,417 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2022-04-06 18:49:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:49:46,417 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 [2022-04-06 18:49:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:46,419 INFO L225 Difference]: With dead ends: 1233 [2022-04-06 18:49:46,419 INFO L226 Difference]: Without dead ends: 1191 [2022-04-06 18:49:46,420 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 [2022-04-06 18:49:46,420 INFO L913 BasicCegarLoop]: 397 mSDtfsCounter, 790 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 3515 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-04-06 18:49:46,420 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] [2022-04-06 18:49:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-04-06 18:49:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1095. [2022-04-06 18:49:46,821 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) [2022-04-06 18:49:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1341 transitions. [2022-04-06 18:49:46,823 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1341 transitions. Word has length 77 [2022-04-06 18:49:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:46,823 INFO L478 AbstractCegarLoop]: Abstraction has 1095 states and 1341 transitions. [2022-04-06 18:49:46,823 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) [2022-04-06 18:49:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1341 transitions. [2022-04-06 18:49:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 18:49:46,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:46,825 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] [2022-04-06 18:49:46,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-04-06 18:49:46,825 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 1 times [2022-04-06 18:49:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447323544] [2022-04-06 18:49:46,826 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 2 times [2022-04-06 18:49:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77969735] [2022-04-06 18:49:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 18:49:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:47,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77969735] [2022-04-06 18:49:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77969735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:47,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:47,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447323544] [2022-04-06 18:49:47,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447323544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:47,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:47,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:47,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016717300] [2022-04-06 18:49:47,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:47,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:47,007 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) [2022-04-06 18:49:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:48,278 INFO L93 Difference]: Finished difference Result 1230 states and 1517 transitions. [2022-04-06 18:49:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:48,279 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 [2022-04-06 18:49:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:48,281 INFO L225 Difference]: With dead ends: 1230 [2022-04-06 18:49:48,281 INFO L226 Difference]: Without dead ends: 1131 [2022-04-06 18:49:48,281 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 [2022-04-06 18:49:48,281 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 [2022-04-06 18:49:48,281 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] [2022-04-06 18:49:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-04-06 18:49:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1061. [2022-04-06 18:49:48,642 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) [2022-04-06 18:49:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1289 transitions. [2022-04-06 18:49:48,644 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1289 transitions. Word has length 78 [2022-04-06 18:49:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:48,644 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1289 transitions. [2022-04-06 18:49:48,644 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) [2022-04-06 18:49:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1289 transitions. [2022-04-06 18:49:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 18:49:48,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:48,645 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] [2022-04-06 18:49:48,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-04-06 18:49:48,645 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 1 times [2022-04-06 18:49:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579017320] [2022-04-06 18:49:48,646 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 2 times [2022-04-06 18:49:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798802539] [2022-04-06 18:49:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798802539] [2022-04-06 18:49:48,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798802539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:48,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579017320] [2022-04-06 18:49:48,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579017320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588501938] [2022-04-06 18:49:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:48,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:48,846 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) [2022-04-06 18:49:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:50,306 INFO L93 Difference]: Finished difference Result 1156 states and 1411 transitions. [2022-04-06 18:49:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:50,307 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 [2022-04-06 18:49:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:50,309 INFO L225 Difference]: With dead ends: 1156 [2022-04-06 18:49:50,309 INFO L226 Difference]: Without dead ends: 1065 [2022-04-06 18:49:50,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:50,309 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:50,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1422 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:49:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-04-06 18:49:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1013. [2022-04-06 18:49:50,648 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) [2022-04-06 18:49:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1227 transitions. [2022-04-06 18:49:50,649 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1227 transitions. Word has length 75 [2022-04-06 18:49:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:50,649 INFO L478 AbstractCegarLoop]: Abstraction has 1013 states and 1227 transitions. [2022-04-06 18:49:50,649 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) [2022-04-06 18:49:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1227 transitions. [2022-04-06 18:49:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:50,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:50,651 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] [2022-04-06 18:49:50,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-04-06 18:49:50,651 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 1 times [2022-04-06 18:49:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1271301846] [2022-04-06 18:49:50,651 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 2 times [2022-04-06 18:49:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:50,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501148442] [2022-04-06 18:49:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 18:49:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:50,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501148442] [2022-04-06 18:49:50,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501148442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:50,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:50,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1271301846] [2022-04-06 18:49:50,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1271301846] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713522160] [2022-04-06 18:49:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:50,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:50,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:50,806 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) [2022-04-06 18:49:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:51,861 INFO L93 Difference]: Finished difference Result 1110 states and 1349 transitions. [2022-04-06 18:49:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:51,861 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 [2022-04-06 18:49:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:51,863 INFO L225 Difference]: With dead ends: 1110 [2022-04-06 18:49:51,863 INFO L226 Difference]: Without dead ends: 1049 [2022-04-06 18:49:51,863 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 [2022-04-06 18:49:51,863 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 [2022-04-06 18:49:51,863 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] [2022-04-06 18:49:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-04-06 18:49:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 997. [2022-04-06 18:49:52,172 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) [2022-04-06 18:49:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2022-04-06 18:49:52,173 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 73 [2022-04-06 18:49:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:52,173 INFO L478 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2022-04-06 18:49:52,174 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) [2022-04-06 18:49:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2022-04-06 18:49:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:52,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:52,176 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] [2022-04-06 18:49:52,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-04-06 18:49:52,176 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 1 times [2022-04-06 18:49:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:52,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1742787770] [2022-04-06 18:49:52,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 2 times [2022-04-06 18:49:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309888359] [2022-04-06 18:49:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 18:49:52,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 18:49:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 18:49:52,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 18:49:52,227 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 18:49:52,227 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 18:49:52,228 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:49:52,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-04-06 18:49:52,231 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] [2022-04-06 18:49:52,233 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 18:49:52,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:49:52 BoogieIcfgContainer [2022-04-06 18:49:52,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 18:49:52,246 INFO L158 Benchmark]: Toolchain (without parser) took 152602.37ms. Allocated memory was 177.2MB in the beginning and 780.1MB in the end (delta: 602.9MB). Free memory was 118.5MB in the beginning and 715.6MB in the end (delta: -597.1MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-04-06 18:49:52,246 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 177.2MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:49:52,246 INFO L158 Benchmark]: CACSL2BoogieTranslator took 496.36ms. Allocated memory was 177.2MB in the beginning and 216.0MB in the end (delta: 38.8MB). Free memory was 118.4MB in the beginning and 169.1MB in the end (delta: -50.7MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-04-06 18:49:52,246 INFO L158 Benchmark]: Boogie Preprocessor took 91.86ms. Allocated memory is still 216.0MB. Free memory was 169.1MB in the beginning and 164.4MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-04-06 18:49:52,246 INFO L158 Benchmark]: RCFGBuilder took 928.28ms. Allocated memory is still 216.0MB. Free memory was 163.8MB in the beginning and 164.6MB in the end (delta: -796.9kB). Peak memory consumption was 54.3MB. Max. memory is 8.0GB. [2022-04-06 18:49:52,246 INFO L158 Benchmark]: TraceAbstraction took 151081.70ms. Allocated memory was 216.0MB in the beginning and 780.1MB in the end (delta: 564.1MB). Free memory was 164.1MB in the beginning and 715.6MB in the end (delta: -551.5MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. [2022-04-06 18:49:52,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 177.2MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 496.36ms. Allocated memory was 177.2MB in the beginning and 216.0MB in the end (delta: 38.8MB). Free memory was 118.4MB in the beginning and 169.1MB in the end (delta: -50.7MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 91.86ms. Allocated memory is still 216.0MB. Free memory was 169.1MB in the beginning and 164.4MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 928.28ms. Allocated memory is still 216.0MB. Free memory was 163.8MB in the beginning and 164.6MB in the end (delta: -796.9kB). Peak memory consumption was 54.3MB. Max. memory is 8.0GB. * TraceAbstraction took 151081.70ms. Allocated memory was 216.0MB in the beginning and 780.1MB in the end (delta: 564.1MB). Free memory was 164.1MB in the beginning and 715.6MB in the end (delta: -551.5MB). Peak memory consumption was 13.2MB. 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: 151.0s, OverallIterations: 70, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 122.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76334 SdHoareTripleChecker+Valid, 92.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75919 mSDsluCounter, 118893 SdHoareTripleChecker+Invalid, 77.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78948 mSDsCounter, 26420 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 183613 IncrementalHoareTripleChecker+Invalid, 210033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26420 mSolverCounterUnsat, 39945 mSDtfsCounter, 183613 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1975 GetRequests, 825 SyntacticMatches, 18 SemanticMatches, 1132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 15.7s 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: 13.8s 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! [2022-04-06 18:49:52,266 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...