/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-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:48:26,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:48:26,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:48:26,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 18:48:26,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 18:48:26,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 18:48:26,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 18:48:26,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 18:48:26,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 18:48:26,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 18:48:26,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 18:48:26,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 18:48:26,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 18:48:26,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 18:48:26,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 18:48:26,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 18:48:26,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 18:48:26,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 18:48:26,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 18:48:26,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 18:48:26,681 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 18:48:26,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 18:48:26,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 18:48:26,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 18:48:26,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 18:48:26,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 18:48:26,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:48:26,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:48:26,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:48:26,698 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 18:48:26,705 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:48:26,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:48:26,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:48:26,706 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:48:26,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:48:26,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:48:26,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:48:26,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:48:26,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:48:26,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:48:26,707 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:48:26,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:48:26,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:48:26,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:48:26,708 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:48:26,709 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:48:26,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:48:26,709 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:48:26,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:48:26,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:48:26,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:48:26,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:48:26,901 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:48:26,902 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:48:26,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-04-06 18:48:26,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cc5a07d/d26d929fac5c46eeb663429016d92b7d/FLAG9369aff4a [2022-04-06 18:48:27,356 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:48:27,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-04-06 18:48:27,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cc5a07d/d26d929fac5c46eeb663429016d92b7d/FLAG9369aff4a [2022-04-06 18:48:27,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cc5a07d/d26d929fac5c46eeb663429016d92b7d [2022-04-06 18:48:27,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:48:27,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:48:27,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:48:27,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:48:27,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:48:27,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c548cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27, skipping insertion in model container [2022-04-06 18:48:27,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:48:27,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:48:27,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-04-06 18:48:27,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:48:27,739 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:48:27,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-04-06 18:48:27,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:48:27,809 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:48:27,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27 WrapperNode [2022-04-06 18:48:27,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:48:27,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:48:27,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:48:27,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:48:27,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:48:27,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:48:27,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:48:27,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:48:27,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (1/1) ... [2022-04-06 18:48:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:48:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:48:27,933 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 18:48:27,950 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 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-06 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-06 18:48:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-04-06 18:48:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-04-06 18:48:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 18:48:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-06 18:48:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:48:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:48:28,160 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:48:28,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:48:28,312 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,360 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-04-06 18:48:28,360 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-04-06 18:48:28,364 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,397 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-04-06 18:48:28,397 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-04-06 18:48:28,423 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,432 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-06 18:48:28,433 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-06 18:48:28,468 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,492 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-04-06 18:48:28,492 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-04-06 18:48:28,492 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-04-06 18:48:28,496 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,637 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-04-06 18:48:28,637 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-04-06 18:48:28,638 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,663 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-06 18:48:28,664 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-06 18:48:28,689 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,707 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-04-06 18:48:28,707 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-04-06 18:48:28,711 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,837 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-04-06 18:48:28,837 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-04-06 18:48:28,846 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:48:28,849 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:48:28,849 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:48:28,868 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:48:28,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:48:28,883 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:48:28,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:48:28 BoogieIcfgContainer [2022-04-06 18:48:28,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:48:28,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:48:28,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:48:28,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:48:28,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:48:27" (1/3) ... [2022-04-06 18:48:28,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26714f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:48:28, skipping insertion in model container [2022-04-06 18:48:28,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:48:27" (2/3) ... [2022-04-06 18:48:28,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26714f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:48:28, skipping insertion in model container [2022-04-06 18:48:28,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:48:28" (3/3) ... [2022-04-06 18:48:28,895 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-04-06 18:48:28,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:48:28,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:48:28,927 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:48:28,932 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 18:48:28,932 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:48:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-04-06 18:48:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 18:48:28,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:28,958 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 18:48:28,958 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-04-06 18:48:28,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:28,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254944930] [2022-04-06 18:48:28,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 2 times [2022-04-06 18:48:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:28,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653475280] [2022-04-06 18:48:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:29,293 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 18:48:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653475280] [2022-04-06 18:48:29,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653475280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:29,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:29,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:48:29,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254944930] [2022-04-06 18:48:29,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254944930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:29,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:29,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:48:29,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225247941] [2022-04-06 18:48:29,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:29,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:48:29,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:48:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:48:29,322 INFO L87 Difference]: Start difference. First operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:48:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:30,968 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-04-06 18:48:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:30,970 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 18:48:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:30,981 INFO L225 Difference]: With dead ends: 1043 [2022-04-06 18:48:30,981 INFO L226 Difference]: Without dead ends: 663 [2022-04-06 18:48:30,986 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 18:48:30,988 INFO L913 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:30,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-04-06 18:48:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-04-06 18:48:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 377 states have (on average 1.4562334217506632) internal successors, (549), 395 states have internal predecessors, (549), 102 states have call successors, (102), 29 states have call predecessors, (102), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 18:48:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-04-06 18:48:31,065 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-04-06 18:48:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:31,065 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-04-06 18:48:31,065 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 18:48:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-04-06 18:48:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 18:48:31,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:31,066 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 18:48:31,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:48:31,067 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-04-06 18:48:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395702380] [2022-04-06 18:48:31,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 2 times [2022-04-06 18:48:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484900946] [2022-04-06 18:48:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:31,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:31,229 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 18:48:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484900946] [2022-04-06 18:48:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484900946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:31,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:31,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:31,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395702380] [2022-04-06 18:48:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395702380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:31,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583905126] [2022-04-06 18:48:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:31,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:31,232 INFO L87 Difference]: Start difference. First operand 507 states and 737 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:32,757 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-04-06 18:48:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:32,759 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 18:48:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:32,765 INFO L225 Difference]: With dead ends: 961 [2022-04-06 18:48:32,765 INFO L226 Difference]: Without dead ends: 842 [2022-04-06 18:48:32,766 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 18:48:32,766 INFO L913 BasicCegarLoop]: 835 mSDtfsCounter, 1480 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:32,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1027 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:48:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-04-06 18:48:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-04-06 18:48:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 501 states have (on average 1.407185628742515) internal successors, (705), 508 states have internal predecessors, (705), 111 states have call successors, (111), 40 states have call predecessors, (111), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-04-06 18:48:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-04-06 18:48:32,827 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-04-06 18:48:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:32,828 INFO L478 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-04-06 18:48:32,828 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 18:48:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-04-06 18:48:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 18:48:32,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:32,829 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 18:48:32,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:48:32,829 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-04-06 18:48:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [883462910] [2022-04-06 18:48:32,830 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 2 times [2022-04-06 18:48:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801561115] [2022-04-06 18:48:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:32,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801561115] [2022-04-06 18:48:32,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801561115] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:32,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:32,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:32,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [883462910] [2022-04-06 18:48:32,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [883462910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:32,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:32,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:32,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800435394] [2022-04-06 18:48:32,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:32,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:32,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:32,969 INFO L87 Difference]: Start difference. First operand 662 states and 961 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:34,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:34,548 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-04-06 18:48:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:34,562 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 18:48:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:34,567 INFO L225 Difference]: With dead ends: 1142 [2022-04-06 18:48:34,567 INFO L226 Difference]: Without dead ends: 966 [2022-04-06 18:48:34,568 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 18:48:34,570 INFO L913 BasicCegarLoop]: 722 mSDtfsCounter, 1133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:34,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 861 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-04-06 18:48:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-04-06 18:48:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 610 states have (on average 1.4032786885245903) internal successors, (856), 613 states have internal predecessors, (856), 113 states have call successors, (113), 46 states have call predecessors, (113), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-04-06 18:48:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-04-06 18:48:34,644 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-04-06 18:48:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:34,645 INFO L478 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-04-06 18:48:34,645 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 18:48:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-04-06 18:48:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 18:48:34,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:34,660 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 18:48:34,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 18:48:34,660 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-04-06 18:48:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965010493] [2022-04-06 18:48:34,661 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 2 times [2022-04-06 18:48:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217707362] [2022-04-06 18:48:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:34,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217707362] [2022-04-06 18:48:34,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217707362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:34,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:34,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:34,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965010493] [2022-04-06 18:48:34,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965010493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:34,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:34,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:34,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727839418] [2022-04-06 18:48:34,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:34,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:34,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:34,780 INFO L87 Difference]: Start difference. First operand 787 states and 1132 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:36,959 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-04-06 18:48:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:48:36,959 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 18:48:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:36,967 INFO L225 Difference]: With dead ends: 1624 [2022-04-06 18:48:36,968 INFO L226 Difference]: Without dead ends: 1340 [2022-04-06 18:48:36,970 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 18:48:36,971 INFO L913 BasicCegarLoop]: 1003 mSDtfsCounter, 746 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:36,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1256 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:48:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-04-06 18:48:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-04-06 18:48:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 707 states have (on average 1.413012729844413) internal successors, (999), 709 states have internal predecessors, (999), 126 states have call successors, (126), 54 states have call predecessors, (126), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-04-06 18:48:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-04-06 18:48:37,064 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-04-06 18:48:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:37,064 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-04-06 18:48:37,064 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 18:48:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-04-06 18:48:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 18:48:37,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:37,066 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 18:48:37,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 18:48:37,066 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-04-06 18:48:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607374337] [2022-04-06 18:48:37,067 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 2 times [2022-04-06 18:48:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:37,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909383718] [2022-04-06 18:48:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:37,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:37,228 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 18:48:37,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909383718] [2022-04-06 18:48:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909383718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:37,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607374337] [2022-04-06 18:48:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607374337] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:37,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:37,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:37,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092575208] [2022-04-06 18:48:37,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:37,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:48:37,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:48:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:48:37,231 INFO L87 Difference]: Start difference. First operand 905 states and 1345 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 18:48:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:38,940 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-04-06 18:48:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:48:38,940 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 18:48:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:38,945 INFO L225 Difference]: With dead ends: 1626 [2022-04-06 18:48:38,945 INFO L226 Difference]: Without dead ends: 1042 [2022-04-06 18:48:38,946 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 18:48:38,947 INFO L913 BasicCegarLoop]: 732 mSDtfsCounter, 2491 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:38,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 991 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:48:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-04-06 18:48:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-04-06 18:48:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 648 states have (on average 1.3981481481481481) internal successors, (906), 651 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-04-06 18:48:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-04-06 18:48:39,028 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-04-06 18:48:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:39,029 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-04-06 18:48:39,029 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 18:48:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-04-06 18:48:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 18:48:39,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:39,032 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 18:48:39,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 18:48:39,032 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-04-06 18:48:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067322190] [2022-04-06 18:48:39,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 2 times [2022-04-06 18:48:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977084331] [2022-04-06 18:48:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:39,130 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 18:48:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977084331] [2022-04-06 18:48:39,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977084331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:39,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:39,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:39,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067322190] [2022-04-06 18:48:39,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067322190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:39,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:39,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993085890] [2022-04-06 18:48:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:39,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:39,136 INFO L87 Difference]: Start difference. First operand 833 states and 1200 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:40,459 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-04-06 18:48:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:40,459 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 18:48:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:40,463 INFO L225 Difference]: With dead ends: 963 [2022-04-06 18:48:40,463 INFO L226 Difference]: Without dead ends: 959 [2022-04-06 18:48:40,464 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 18:48:40,464 INFO L913 BasicCegarLoop]: 710 mSDtfsCounter, 1150 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:40,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 952 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:48:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-06 18:48:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-04-06 18:48:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 648 states have (on average 1.3950617283950617) internal successors, (904), 650 states have internal predecessors, (904), 116 states have call successors, (116), 50 states have call predecessors, (116), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-04-06 18:48:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-04-06 18:48:40,542 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-04-06 18:48:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:40,542 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-04-06 18:48:40,542 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 18:48:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-04-06 18:48:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 18:48:40,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:40,544 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 18:48:40,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 18:48:40,544 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-04-06 18:48:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739927450] [2022-04-06 18:48:40,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 2 times [2022-04-06 18:48:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991915829] [2022-04-06 18:48:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:40,665 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 18:48:40,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991915829] [2022-04-06 18:48:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991915829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:40,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739927450] [2022-04-06 18:48:40,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739927450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:40,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:40,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:40,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734914401] [2022-04-06 18:48:40,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:40,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:48:40,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:48:40,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:48:40,667 INFO L87 Difference]: Start difference. First operand 832 states and 1197 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:42,307 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-04-06 18:48:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:48:42,308 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 18:48:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:42,312 INFO L225 Difference]: With dead ends: 1409 [2022-04-06 18:48:42,312 INFO L226 Difference]: Without dead ends: 993 [2022-04-06 18:48:42,313 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 18:48:42,313 INFO L913 BasicCegarLoop]: 812 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:42,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1232 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-04-06 18:48:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-04-06 18:48:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 570 states have (on average 1.3859649122807018) internal successors, (790), 573 states have internal predecessors, (790), 105 states have call successors, (105), 45 states have call predecessors, (105), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-04-06 18:48:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-04-06 18:48:42,415 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-04-06 18:48:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:42,415 INFO L478 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-04-06 18:48:42,415 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 18:48:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-04-06 18:48:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 18:48:42,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:42,417 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 18:48:42,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 18:48:42,417 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-04-06 18:48:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:42,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184873834] [2022-04-06 18:48:42,418 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 2 times [2022-04-06 18:48:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:42,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814897252] [2022-04-06 18:48:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:42,538 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 18:48:42,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814897252] [2022-04-06 18:48:42,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814897252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:42,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:42,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:42,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:42,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184873834] [2022-04-06 18:48:42,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184873834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:42,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:42,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:48:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204300734] [2022-04-06 18:48:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:42,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:48:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:48:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:48:42,540 INFO L87 Difference]: Start difference. First operand 734 states and 1026 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 18:48:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:43,767 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-04-06 18:48:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:48:43,767 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 18:48:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:43,770 INFO L225 Difference]: With dead ends: 975 [2022-04-06 18:48:43,771 INFO L226 Difference]: Without dead ends: 957 [2022-04-06 18:48:43,771 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 18:48:43,771 INFO L913 BasicCegarLoop]: 669 mSDtfsCounter, 1139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:43,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 749 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:48:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-04-06 18:48:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-04-06 18:48:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3962585034013606) internal successors, (821), 600 states have internal predecessors, (821), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-04-06 18:48:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-04-06 18:48:43,857 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-04-06 18:48:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:43,859 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-04-06 18:48:43,859 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 18:48:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-04-06 18:48:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 18:48:43,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:43,862 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 18:48:43,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 18:48:43,862 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-04-06 18:48:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:43,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435616345] [2022-04-06 18:48:43,863 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 2 times [2022-04-06 18:48:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:43,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758343258] [2022-04-06 18:48:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 18:48:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:43,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758343258] [2022-04-06 18:48:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758343258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:43,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:43,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435616345] [2022-04-06 18:48:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435616345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:43,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038372261] [2022-04-06 18:48:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:43,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:48:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:48:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:48:43,970 INFO L87 Difference]: Start difference. First operand 754 states and 1052 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:48:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:45,393 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-04-06 18:48:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:45,393 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 18:48:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:45,397 INFO L225 Difference]: With dead ends: 1159 [2022-04-06 18:48:45,397 INFO L226 Difference]: Without dead ends: 934 [2022-04-06 18:48:45,398 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 18:48:45,398 INFO L913 BasicCegarLoop]: 788 mSDtfsCounter, 921 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:45,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1341 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:48:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-04-06 18:48:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-04-06 18:48:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3945578231292517) internal successors, (820), 600 states have internal predecessors, (820), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-04-06 18:48:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-04-06 18:48:45,490 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-04-06 18:48:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:45,490 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-04-06 18:48:45,490 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 18:48:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-04-06 18:48:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:48:45,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:45,492 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 18:48:45,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 18:48:45,492 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-04-06 18:48:45,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:45,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450912100] [2022-04-06 18:48:45,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:45,493 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 2 times [2022-04-06 18:48:45,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:45,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885756390] [2022-04-06 18:48:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:45,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 18:48:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:45,582 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 18:48:45,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885756390] [2022-04-06 18:48:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885756390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:45,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:45,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:45,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450912100] [2022-04-06 18:48:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450912100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:45,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:45,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549312724] [2022-04-06 18:48:45,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:45,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:48:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:48:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:48:45,584 INFO L87 Difference]: Start difference. First operand 754 states and 1051 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:48:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:46,455 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-04-06 18:48:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:46,456 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 18:48:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:46,459 INFO L225 Difference]: With dead ends: 956 [2022-04-06 18:48:46,459 INFO L226 Difference]: Without dead ends: 889 [2022-04-06 18:48:46,460 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 18:48:46,460 INFO L913 BasicCegarLoop]: 664 mSDtfsCounter, 1894 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:46,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 1086 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:48:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-04-06 18:48:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-04-06 18:48:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 581 states have (on average 1.395869191049914) internal successors, (811), 593 states have internal predecessors, (811), 105 states have call successors, (105), 46 states have call predecessors, (105), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-04-06 18:48:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-04-06 18:48:46,555 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-04-06 18:48:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:46,555 INFO L478 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-04-06 18:48:46,555 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 18:48:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-04-06 18:48:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 18:48:46,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:46,557 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 18:48:46,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 18:48:46,557 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-04-06 18:48:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631159178] [2022-04-06 18:48:46,558 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 2 times [2022-04-06 18:48:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198342869] [2022-04-06 18:48:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:48:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198342869] [2022-04-06 18:48:46,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198342869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:46,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:46,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:46,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631159178] [2022-04-06 18:48:46,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631159178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:46,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:48:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387957573] [2022-04-06 18:48:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:46,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:48:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:48:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:48:46,701 INFO L87 Difference]: Start difference. First operand 743 states and 1038 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:48:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:48,979 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-04-06 18:48:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:48:48,979 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 18:48:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:48,983 INFO L225 Difference]: With dead ends: 1059 [2022-04-06 18:48:48,983 INFO L226 Difference]: Without dead ends: 998 [2022-04-06 18:48:48,983 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 18:48:48,984 INFO L913 BasicCegarLoop]: 750 mSDtfsCounter, 1803 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:48,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 1981 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:48:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-04-06 18:48:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-04-06 18:48:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 616 states have (on average 1.3944805194805194) internal successors, (859), 627 states have internal predecessors, (859), 109 states have call successors, (109), 49 states have call predecessors, (109), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-04-06 18:48:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-04-06 18:48:49,090 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-04-06 18:48:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:49,090 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-04-06 18:48:49,090 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 18:48:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-04-06 18:48:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:48:49,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:49,092 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 18:48:49,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 18:48:49,092 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-04-06 18:48:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:49,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333916740] [2022-04-06 18:48:49,093 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 2 times [2022-04-06 18:48:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819819695] [2022-04-06 18:48:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:48:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:49,194 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 18:48:49,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819819695] [2022-04-06 18:48:49,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819819695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:49,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:49,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:49,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333916740] [2022-04-06 18:48:49,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333916740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:49,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:49,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:48:49,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904098903] [2022-04-06 18:48:49,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:49,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:48:49,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:48:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:48:49,195 INFO L87 Difference]: Start difference. First operand 786 states and 1099 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:50,877 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-04-06 18:48:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:48:50,877 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 18:48:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:50,881 INFO L225 Difference]: With dead ends: 1094 [2022-04-06 18:48:50,881 INFO L226 Difference]: Without dead ends: 1083 [2022-04-06 18:48:50,882 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 18:48:50,882 INFO L913 BasicCegarLoop]: 804 mSDtfsCounter, 1242 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:50,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 1386 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-04-06 18:48:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-04-06 18:48:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 672 states have (on average 1.3675595238095237) internal successors, (919), 678 states have internal predecessors, (919), 111 states have call successors, (111), 51 states have call predecessors, (111), 76 states have return successors, (154), 137 states have call predecessors, (154), 104 states have call successors, (154) [2022-04-06 18:48:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-04-06 18:48:51,025 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-04-06 18:48:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:51,025 INFO L478 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-04-06 18:48:51,025 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 18:48:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-04-06 18:48:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:48:51,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:51,027 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 18:48:51,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 18:48:51,027 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-04-06 18:48:51,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2611353] [2022-04-06 18:48:51,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 2 times [2022-04-06 18:48:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128815350] [2022-04-06 18:48:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:48:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:51,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:51,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128815350] [2022-04-06 18:48:51,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128815350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:51,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:51,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:51,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2611353] [2022-04-06 18:48:51,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2611353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:51,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:51,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896538181] [2022-04-06 18:48:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:51,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:51,189 INFO L87 Difference]: Start difference. First operand 860 states and 1184 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:48:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:53,145 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-04-06 18:48:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:48:53,145 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 18:48:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:53,148 INFO L225 Difference]: With dead ends: 1020 [2022-04-06 18:48:53,149 INFO L226 Difference]: Without dead ends: 957 [2022-04-06 18:48:53,149 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 18:48:53,150 INFO L913 BasicCegarLoop]: 649 mSDtfsCounter, 2232 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:53,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 1785 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:48:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-04-06 18:48:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-04-06 18:48:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 653 states have (on average 1.3721286370597243) internal successors, (896), 666 states have internal predecessors, (896), 111 states have call successors, (111), 51 states have call predecessors, (111), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-04-06 18:48:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-04-06 18:48:53,283 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-04-06 18:48:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:53,283 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-04-06 18:48:53,284 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 18:48:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-04-06 18:48:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:48:53,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:53,285 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 18:48:53,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 18:48:53,285 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-04-06 18:48:53,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881351591] [2022-04-06 18:48:53,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 2 times [2022-04-06 18:48:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:53,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051515300] [2022-04-06 18:48:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:48:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:53,433 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 18:48:53,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:53,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051515300] [2022-04-06 18:48:53,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051515300] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:53,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881351591] [2022-04-06 18:48:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881351591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:53,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:48:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938073285] [2022-04-06 18:48:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:53,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:48:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:48:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:48:53,435 INFO L87 Difference]: Start difference. First operand 837 states and 1150 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:48:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:55,069 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-04-06 18:48:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:48:55,069 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 18:48:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:55,072 INFO L225 Difference]: With dead ends: 982 [2022-04-06 18:48:55,072 INFO L226 Difference]: Without dead ends: 977 [2022-04-06 18:48:55,073 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 18:48:55,073 INFO L913 BasicCegarLoop]: 691 mSDtfsCounter, 1534 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:55,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1435 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:48:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-04-06 18:48:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-04-06 18:48:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 668 states have (on average 1.3682634730538923) internal successors, (914), 682 states have internal predecessors, (914), 112 states have call successors, (112), 52 states have call predecessors, (112), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-04-06 18:48:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-04-06 18:48:55,205 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-04-06 18:48:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:55,205 INFO L478 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-04-06 18:48:55,205 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 18:48:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-04-06 18:48:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:48:55,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:55,207 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 18:48:55,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 18:48:55,208 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:55,210 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-04-06 18:48:55,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:55,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857868129] [2022-04-06 18:48:55,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:55,210 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 2 times [2022-04-06 18:48:55,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:55,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200166760] [2022-04-06 18:48:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:48:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 18:48:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200166760] [2022-04-06 18:48:55,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200166760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:55,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:55,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:55,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857868129] [2022-04-06 18:48:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857868129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:55,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:55,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:48:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345204156] [2022-04-06 18:48:55,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:55,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:48:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:48:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:48:55,303 INFO L87 Difference]: Start difference. First operand 855 states and 1171 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:56,895 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-04-06 18:48:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:48:56,896 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 18:48:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:56,901 INFO L225 Difference]: With dead ends: 1188 [2022-04-06 18:48:56,901 INFO L226 Difference]: Without dead ends: 947 [2022-04-06 18:48:56,902 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 18:48:56,902 INFO L913 BasicCegarLoop]: 638 mSDtfsCounter, 1034 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:56,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1163 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:48:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-04-06 18:48:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-04-06 18:48:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 647 states have (on average 1.3663060278207109) internal successors, (884), 659 states have internal predecessors, (884), 110 states have call successors, (110), 51 states have call predecessors, (110), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-04-06 18:48:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-04-06 18:48:57,047 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-04-06 18:48:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:57,047 INFO L478 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-04-06 18:48:57,047 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 18:48:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-04-06 18:48:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:48:57,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:57,049 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 18:48:57,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 18:48:57,049 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-04-06 18:48:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219753389] [2022-04-06 18:48:57,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 2 times [2022-04-06 18:48:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:57,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382015411] [2022-04-06 18:48:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:48:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:57,172 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 18:48:57,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382015411] [2022-04-06 18:48:57,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382015411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:57,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:57,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:57,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219753389] [2022-04-06 18:48:57,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219753389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:57,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:57,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741667149] [2022-04-06 18:48:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:57,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:57,175 INFO L87 Difference]: Start difference. First operand 827 states and 1134 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:48:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:59,614 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-04-06 18:48:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:48:59,614 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 18:48:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:59,617 INFO L225 Difference]: With dead ends: 962 [2022-04-06 18:48:59,617 INFO L226 Difference]: Without dead ends: 958 [2022-04-06 18:48:59,617 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 18:48:59,618 INFO L913 BasicCegarLoop]: 703 mSDtfsCounter, 371 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 4881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:59,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2378 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 18:48:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-04-06 18:48:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-04-06 18:48:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 653 states have (on average 1.3644716692189893) internal successors, (891), 666 states have internal predecessors, (891), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-06 18:48:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-04-06 18:48:59,752 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-04-06 18:48:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:59,752 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-04-06 18:48:59,752 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 18:48:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-04-06 18:48:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:48:59,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:48:59,754 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 18:48:59,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 18:48:59,754 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:48:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:48:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-04-06 18:48:59,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604514055] [2022-04-06 18:48:59,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:48:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 2 times [2022-04-06 18:48:59,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:48:59,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879155087] [2022-04-06 18:48:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:48:59,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:48:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:48:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:48:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:48:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:48:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:48:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:48:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:48:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:48:59,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879155087] [2022-04-06 18:48:59,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879155087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:48:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604514055] [2022-04-06 18:48:59,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604514055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:48:59,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:48:59,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:48:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062093163] [2022-04-06 18:48:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:48:59,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:48:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:48:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:48:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:48:59,899 INFO L87 Difference]: Start difference. First operand 834 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 18:49:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:02,004 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-04-06 18:49:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:02,005 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 18:49:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:02,008 INFO L225 Difference]: With dead ends: 977 [2022-04-06 18:49:02,008 INFO L226 Difference]: Without dead ends: 953 [2022-04-06 18:49:02,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:49:02,009 INFO L913 BasicCegarLoop]: 705 mSDtfsCounter, 737 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 3841 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 3841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:02,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2434 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 3841 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:49:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-04-06 18:49:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-04-06 18:49:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.3634969325153374) internal successors, (889), 665 states have internal predecessors, (889), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-06 18:49:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-04-06 18:49:02,151 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-04-06 18:49:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:02,151 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-04-06 18:49:02,151 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 18:49:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-04-06 18:49:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:49:02,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:02,155 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 18:49:02,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 18:49:02,155 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-04-06 18:49:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843541432] [2022-04-06 18:49:02,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 2 times [2022-04-06 18:49:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527540388] [2022-04-06 18:49:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:02,342 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 18:49:02,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:02,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527540388] [2022-04-06 18:49:02,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527540388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:02,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:02,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:02,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:02,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843541432] [2022-04-06 18:49:02,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843541432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:02,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:02,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659048910] [2022-04-06 18:49:02,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:02,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:02,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:02,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:02,344 INFO L87 Difference]: Start difference. First operand 833 states and 1141 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:04,478 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-04-06 18:49:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:04,478 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 18:49:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:04,481 INFO L225 Difference]: With dead ends: 963 [2022-04-06 18:49:04,481 INFO L226 Difference]: Without dead ends: 957 [2022-04-06 18:49:04,482 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 18:49:04,482 INFO L913 BasicCegarLoop]: 653 mSDtfsCounter, 1931 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:04,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1957 Valid, 1476 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:49:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-04-06 18:49:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-04-06 18:49:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.361963190184049) internal successors, (888), 665 states have internal predecessors, (888), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-04-06 18:49:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-04-06 18:49:04,633 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-04-06 18:49:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:04,634 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-04-06 18:49:04,634 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 18:49:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-04-06 18:49:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:49:04,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:04,636 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] [2022-04-06 18:49:04,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 18:49:04,636 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-04-06 18:49:04,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:04,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1976069120] [2022-04-06 18:49:04,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 2 times [2022-04-06 18:49:04,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:04,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259064667] [2022-04-06 18:49:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:04,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259064667] [2022-04-06 18:49:04,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259064667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:04,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:04,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:04,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1976069120] [2022-04-06 18:49:04,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1976069120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:04,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:04,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133589803] [2022-04-06 18:49:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:04,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:04,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:04,771 INFO L87 Difference]: Start difference. First operand 833 states and 1140 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:49:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:06,424 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-04-06 18:49:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:06,425 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 18:49:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:06,431 INFO L225 Difference]: With dead ends: 967 [2022-04-06 18:49:06,432 INFO L226 Difference]: Without dead ends: 931 [2022-04-06 18:49:06,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:49:06,433 INFO L913 BasicCegarLoop]: 656 mSDtfsCounter, 2284 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:06,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1257 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:49:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-04-06 18:49:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-04-06 18:49:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.370429252782194) internal successors, (862), 641 states have internal predecessors, (862), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-04-06 18:49:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-04-06 18:49:06,596 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-04-06 18:49:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:06,597 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-04-06 18:49:06,597 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 18:49:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-04-06 18:49:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:49:06,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:06,600 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 18:49:06,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 18:49:06,601 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-04-06 18:49:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513767598] [2022-04-06 18:49:06,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 2 times [2022-04-06 18:49:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:06,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981670979] [2022-04-06 18:49:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981670979] [2022-04-06 18:49:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981670979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:06,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513767598] [2022-04-06 18:49:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513767598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:06,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:06,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:49:06,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21816468] [2022-04-06 18:49:06,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:06,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:49:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:49:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:49:06,817 INFO L87 Difference]: Start difference. First operand 805 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:08,803 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-04-06 18:49:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:08,804 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 18:49:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:08,807 INFO L225 Difference]: With dead ends: 933 [2022-04-06 18:49:08,807 INFO L226 Difference]: Without dead ends: 927 [2022-04-06 18:49:08,807 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 18:49:08,808 INFO L913 BasicCegarLoop]: 624 mSDtfsCounter, 2924 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:08,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 1295 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:49:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-04-06 18:49:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-04-06 18:49:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.368839427662957) internal successors, (861), 641 states have internal predecessors, (861), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-04-06 18:49:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-04-06 18:49:08,974 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-04-06 18:49:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:08,974 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-04-06 18:49:08,974 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 18:49:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-04-06 18:49:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 18:49:08,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:08,976 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 18:49:08,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 18:49:08,976 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-04-06 18:49:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:08,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973004367] [2022-04-06 18:49:08,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 2 times [2022-04-06 18:49:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:08,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673148665] [2022-04-06 18:49:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:09,141 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 18:49:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673148665] [2022-04-06 18:49:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673148665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:09,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973004367] [2022-04-06 18:49:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973004367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:09,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:09,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126186985] [2022-04-06 18:49:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:09,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:09,142 INFO L87 Difference]: Start difference. First operand 805 states and 1107 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:11,515 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-04-06 18:49:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:49:11,516 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 18:49:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:11,519 INFO L225 Difference]: With dead ends: 956 [2022-04-06 18:49:11,519 INFO L226 Difference]: Without dead ends: 916 [2022-04-06 18:49:11,519 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 18:49:11,520 INFO L913 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 4557 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 5126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 4557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:11,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2654 Invalid, 5126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4557 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:49:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-04-06 18:49:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-04-06 18:49:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 622 states have (on average 1.3520900321543408) internal successors, (841), 634 states have internal predecessors, (841), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-04-06 18:49:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-04-06 18:49:11,689 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-04-06 18:49:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:11,689 INFO L478 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-04-06 18:49:11,689 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 18:49:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-04-06 18:49:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 18:49:11,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:11,691 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] [2022-04-06 18:49:11,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 18:49:11,691 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-04-06 18:49:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745321330] [2022-04-06 18:49:11,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 2 times [2022-04-06 18:49:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368929502] [2022-04-06 18:49:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:11,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:11,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368929502] [2022-04-06 18:49:11,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368929502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:11,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:11,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:11,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:11,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745321330] [2022-04-06 18:49:11,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745321330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:11,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:11,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:11,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308596839] [2022-04-06 18:49:11,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:11,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:11,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:11,887 INFO L87 Difference]: Start difference. First operand 796 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:14,350 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-04-06 18:49:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:14,352 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 18:49:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:14,355 INFO L225 Difference]: With dead ends: 932 [2022-04-06 18:49:14,355 INFO L226 Difference]: Without dead ends: 914 [2022-04-06 18:49:14,357 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 18:49:14,358 INFO L913 BasicCegarLoop]: 670 mSDtfsCounter, 991 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:14,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2775 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 18:49:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-04-06 18:49:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-04-06 18:49:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 621 states have (on average 1.3510466988727858) internal successors, (839), 633 states have internal predecessors, (839), 105 states have call successors, (105), 49 states have call predecessors, (105), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-04-06 18:49:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-04-06 18:49:14,528 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 56 [2022-04-06 18:49:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:14,528 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-04-06 18:49:14,528 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 18:49:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-04-06 18:49:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 18:49:14,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:14,530 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] [2022-04-06 18:49:14,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 18:49:14,530 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-04-06 18:49:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705647256] [2022-04-06 18:49:14,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 2 times [2022-04-06 18:49:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038948327] [2022-04-06 18:49:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038948327] [2022-04-06 18:49:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038948327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:14,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:14,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705647256] [2022-04-06 18:49:14,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705647256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:14,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:14,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:49:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109738460] [2022-04-06 18:49:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:14,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:49:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:49:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:49:14,703 INFO L87 Difference]: Start difference. First operand 794 states and 1079 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:16,868 INFO L93 Difference]: Finished difference Result 927 states and 1303 transitions. [2022-04-06 18:49:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:16,868 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 18:49:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:16,871 INFO L225 Difference]: With dead ends: 927 [2022-04-06 18:49:16,871 INFO L226 Difference]: Without dead ends: 909 [2022-04-06 18:49:16,872 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 18:49:16,872 INFO L913 BasicCegarLoop]: 654 mSDtfsCounter, 363 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:16,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2581 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:49:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-04-06 18:49:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-04-06 18:49:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3511326860841424) internal successors, (835), 630 states have internal predecessors, (835), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-04-06 18:49:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1072 transitions. [2022-04-06 18:49:17,048 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1072 transitions. Word has length 55 [2022-04-06 18:49:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:17,048 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1072 transitions. [2022-04-06 18:49:17,049 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 18:49:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1072 transitions. [2022-04-06 18:49:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 18:49:17,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:17,050 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 18:49:17,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 18:49:17,050 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-04-06 18:49:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233849844] [2022-04-06 18:49:17,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 2 times [2022-04-06 18:49:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111106254] [2022-04-06 18:49:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:17,172 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 18:49:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111106254] [2022-04-06 18:49:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111106254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:17,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:17,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233849844] [2022-04-06 18:49:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233849844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:17,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708070906] [2022-04-06 18:49:17,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:17,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:17,174 INFO L87 Difference]: Start difference. First operand 789 states and 1072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:19,141 INFO L93 Difference]: Finished difference Result 974 states and 1354 transitions. [2022-04-06 18:49:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:19,141 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 18:49:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:19,144 INFO L225 Difference]: With dead ends: 974 [2022-04-06 18:49:19,144 INFO L226 Difference]: Without dead ends: 931 [2022-04-06 18:49:19,145 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 18:49:19,145 INFO L913 BasicCegarLoop]: 675 mSDtfsCounter, 1170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:19,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1314 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:49:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-04-06 18:49:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 789. [2022-04-06 18:49:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3495145631067962) internal successors, (834), 630 states have internal predecessors, (834), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-04-06 18:49:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-04-06 18:49:19,318 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-04-06 18:49:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:19,319 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-04-06 18:49:19,319 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 18:49:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-04-06 18:49:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:49:19,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:19,320 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:19,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 18:49:19,320 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 1 times [2022-04-06 18:49:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970927936] [2022-04-06 18:49:19,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 2 times [2022-04-06 18:49:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250073221] [2022-04-06 18:49:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 18:49:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 18:49:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250073221] [2022-04-06 18:49:19,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250073221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:19,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:19,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:49:19,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970927936] [2022-04-06 18:49:19,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970927936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:19,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:19,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:49:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118618192] [2022-04-06 18:49:19,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:19,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:49:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:49:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:49:19,464 INFO L87 Difference]: Start difference. First operand 789 states and 1071 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:20,569 INFO L93 Difference]: Finished difference Result 1224 states and 1667 transitions. [2022-04-06 18:49:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 73 [2022-04-06 18:49:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:20,572 INFO L225 Difference]: With dead ends: 1224 [2022-04-06 18:49:20,572 INFO L226 Difference]: Without dead ends: 778 [2022-04-06 18:49:20,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:49:20,573 INFO L913 BasicCegarLoop]: 530 mSDtfsCounter, 1764 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:20,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 797 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-04-06 18:49:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-04-06 18:49:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 609 states have (on average 1.341543513957307) internal successors, (817), 620 states have internal predecessors, (817), 103 states have call successors, (103), 49 states have call predecessors, (103), 65 states have return successors, (122), 115 states have call predecessors, (122), 97 states have call successors, (122) [2022-04-06 18:49:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1042 transitions. [2022-04-06 18:49:20,738 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1042 transitions. Word has length 73 [2022-04-06 18:49:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:20,738 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1042 transitions. [2022-04-06 18:49:20,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1042 transitions. [2022-04-06 18:49:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 18:49:20,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:20,739 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 18:49:20,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 18:49:20,740 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-04-06 18:49:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491323823] [2022-04-06 18:49:20,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 2 times [2022-04-06 18:49:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171172560] [2022-04-06 18:49:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 18:49:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:20,842 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 18:49:20,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171172560] [2022-04-06 18:49:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171172560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:20,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491323823] [2022-04-06 18:49:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491323823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:20,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:20,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619432836] [2022-04-06 18:49:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:20,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:49:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:49:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:49:20,844 INFO L87 Difference]: Start difference. First operand 778 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:22,008 INFO L93 Difference]: Finished difference Result 911 states and 1202 transitions. [2022-04-06 18:49:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-04-06 18:49:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:22,011 INFO L225 Difference]: With dead ends: 911 [2022-04-06 18:49:22,011 INFO L226 Difference]: Without dead ends: 820 [2022-04-06 18:49:22,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:22,012 INFO L913 BasicCegarLoop]: 606 mSDtfsCounter, 1177 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:22,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1027 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:49:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-04-06 18:49:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 788. [2022-04-06 18:49:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 616 states have (on average 1.3327922077922079) internal successors, (821), 627 states have internal predecessors, (821), 103 states have call successors, (103), 51 states have call predecessors, (103), 68 states have return successors, (124), 116 states have call predecessors, (124), 98 states have call successors, (124) [2022-04-06 18:49:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1048 transitions. [2022-04-06 18:49:22,182 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1048 transitions. Word has length 61 [2022-04-06 18:49:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:22,182 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 1048 transitions. [2022-04-06 18:49:22,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1048 transitions. [2022-04-06 18:49:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:49:22,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:22,183 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 18:49:22,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 18:49:22,184 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-04-06 18:49:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910703516] [2022-04-06 18:49:22,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 2 times [2022-04-06 18:49:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:22,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042341451] [2022-04-06 18:49:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 18:49:22,362 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 3 [2022-04-06 18:49:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:22,409 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 18:49:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042341451] [2022-04-06 18:49:22,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042341451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:22,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910703516] [2022-04-06 18:49:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910703516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:22,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:22,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:22,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150700230] [2022-04-06 18:49:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:22,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:49:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:49:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:22,411 INFO L87 Difference]: Start difference. First operand 788 states and 1048 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:24,771 INFO L93 Difference]: Finished difference Result 814 states and 1076 transitions. [2022-04-06 18:49:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:24,771 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 18:49:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:24,774 INFO L225 Difference]: With dead ends: 814 [2022-04-06 18:49:24,774 INFO L226 Difference]: Without dead ends: 790 [2022-04-06 18:49:24,775 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 18:49:24,775 INFO L913 BasicCegarLoop]: 583 mSDtfsCounter, 709 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 5603 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 5859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 5603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:24,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 2389 Invalid, 5859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 5603 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:49:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-04-06 18:49:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-04-06 18:49:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 615 states have (on average 1.3317073170731708) internal successors, (819), 626 states have internal predecessors, (819), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-04-06 18:49:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1044 transitions. [2022-04-06 18:49:24,954 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1044 transitions. Word has length 62 [2022-04-06 18:49:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:24,954 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 1044 transitions. [2022-04-06 18:49:24,954 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 18:49:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1044 transitions. [2022-04-06 18:49:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 18:49:24,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:24,956 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 18:49:24,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 18:49:24,957 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-04-06 18:49:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971183685] [2022-04-06 18:49:24,957 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 2 times [2022-04-06 18:49:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683747055] [2022-04-06 18:49:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:25,180 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 18:49:25,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:25,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683747055] [2022-04-06 18:49:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683747055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:25,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:25,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:25,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:25,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971183685] [2022-04-06 18:49:25,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971183685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:25,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:25,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:25,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568388220] [2022-04-06 18:49:25,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:25,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:49:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:49:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:25,182 INFO L87 Difference]: Start difference. First operand 786 states and 1044 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:27,407 INFO L93 Difference]: Finished difference Result 812 states and 1072 transitions. [2022-04-06 18:49:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:27,407 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 18:49:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:27,410 INFO L225 Difference]: With dead ends: 812 [2022-04-06 18:49:27,410 INFO L226 Difference]: Without dead ends: 787 [2022-04-06 18:49:27,410 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 18:49:27,411 INFO L913 BasicCegarLoop]: 562 mSDtfsCounter, 717 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 5343 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 5595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:27,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2153 Invalid, 5595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5343 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:49:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-04-06 18:49:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2022-04-06 18:49:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 614 states have (on average 1.3159609120521172) internal successors, (808), 625 states have internal predecessors, (808), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-04-06 18:49:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1033 transitions. [2022-04-06 18:49:27,583 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1033 transitions. Word has length 59 [2022-04-06 18:49:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:27,583 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 1033 transitions. [2022-04-06 18:49:27,583 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 18:49:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1033 transitions. [2022-04-06 18:49:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:49:27,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:27,585 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 18:49:27,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 18:49:27,585 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-04-06 18:49:27,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267409769] [2022-04-06 18:49:27,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 2 times [2022-04-06 18:49:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:27,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447187918] [2022-04-06 18:49:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:27,813 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 18:49:27,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:27,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447187918] [2022-04-06 18:49:27,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447187918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:27,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:27,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:27,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267409769] [2022-04-06 18:49:27,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267409769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:27,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:27,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593074065] [2022-04-06 18:49:27,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:27,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:27,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:27,815 INFO L87 Difference]: Start difference. First operand 785 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:49:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:29,942 INFO L93 Difference]: Finished difference Result 802 states and 1051 transitions. [2022-04-06 18:49:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:49:29,942 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 18:49:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:29,945 INFO L225 Difference]: With dead ends: 802 [2022-04-06 18:49:29,945 INFO L226 Difference]: Without dead ends: 782 [2022-04-06 18:49:29,945 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 18:49:29,945 INFO L913 BasicCegarLoop]: 572 mSDtfsCounter, 641 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:29,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2143 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:49:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-04-06 18:49:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2022-04-06 18:49:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 612 states have (on average 1.315359477124183) internal successors, (805), 623 states have internal predecessors, (805), 101 states have call successors, (101), 51 states have call predecessors, (101), 68 states have return successors, (122), 114 states have call predecessors, (122), 96 states have call successors, (122) [2022-04-06 18:49:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1028 transitions. [2022-04-06 18:49:30,122 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1028 transitions. Word has length 58 [2022-04-06 18:49:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:30,123 INFO L478 AbstractCegarLoop]: Abstraction has 782 states and 1028 transitions. [2022-04-06 18:49:30,123 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 18:49:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1028 transitions. [2022-04-06 18:49:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 18:49:30,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:30,124 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 18:49:30,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 18:49:30,124 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-04-06 18:49:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:30,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112701433] [2022-04-06 18:49:30,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 2 times [2022-04-06 18:49:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:30,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466239955] [2022-04-06 18:49:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:49:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:30,336 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 18:49:30,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466239955] [2022-04-06 18:49:30,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466239955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:30,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:30,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:30,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112701433] [2022-04-06 18:49:30,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112701433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:30,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:30,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84867211] [2022-04-06 18:49:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:30,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:30,338 INFO L87 Difference]: Start difference. First operand 782 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:32,272 INFO L93 Difference]: Finished difference Result 835 states and 1083 transitions. [2022-04-06 18:49:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:32,272 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 18:49:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:32,275 INFO L225 Difference]: With dead ends: 835 [2022-04-06 18:49:32,275 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 18:49:32,275 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 18:49:32,276 INFO L913 BasicCegarLoop]: 567 mSDtfsCounter, 963 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 4087 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 4433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 4087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:32,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1936 Invalid, 4433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 4087 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:49:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 18:49:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2022-04-06 18:49:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 614 states have internal predecessors, (790), 98 states have call successors, (98), 51 states have call predecessors, (98), 68 states have return successors, (119), 111 states have call predecessors, (119), 93 states have call successors, (119) [2022-04-06 18:49:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1007 transitions. [2022-04-06 18:49:32,435 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1007 transitions. Word has length 59 [2022-04-06 18:49:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:32,435 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 1007 transitions. [2022-04-06 18:49:32,435 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 18:49:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1007 transitions. [2022-04-06 18:49:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:49:32,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:32,437 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 18:49:32,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 18:49:32,437 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-04-06 18:49:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:32,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [809281400] [2022-04-06 18:49:32,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 2 times [2022-04-06 18:49:32,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:32,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657621096] [2022-04-06 18:49:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:49:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:32,592 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 18:49:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:32,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657621096] [2022-04-06 18:49:32,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657621096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:32,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:49:32,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:32,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [809281400] [2022-04-06 18:49:32,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [809281400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:32,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:32,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:49:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221498136] [2022-04-06 18:49:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:32,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:49:32,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:49:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:49:32,595 INFO L87 Difference]: Start difference. First operand 770 states and 1007 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:33,928 INFO L93 Difference]: Finished difference Result 913 states and 1205 transitions. [2022-04-06 18:49:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:49:33,928 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 18:49:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:33,931 INFO L225 Difference]: With dead ends: 913 [2022-04-06 18:49:33,931 INFO L226 Difference]: Without dead ends: 808 [2022-04-06 18:49:33,931 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 18:49:33,931 INFO L913 BasicCegarLoop]: 536 mSDtfsCounter, 972 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:33,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1181 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:49:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-04-06 18:49:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 777. [2022-04-06 18:49:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 608 states have (on average 1.3108552631578947) internal successors, (797), 620 states have internal predecessors, (797), 99 states have call successors, (99), 51 states have call predecessors, (99), 69 states have return successors, (126), 112 states have call predecessors, (126), 94 states have call successors, (126) [2022-04-06 18:49:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1022 transitions. [2022-04-06 18:49:34,095 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1022 transitions. Word has length 60 [2022-04-06 18:49:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:34,095 INFO L478 AbstractCegarLoop]: Abstraction has 777 states and 1022 transitions. [2022-04-06 18:49:34,095 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 18:49:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1022 transitions. [2022-04-06 18:49:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:49:34,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:34,097 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 18:49:34,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 18:49:34,097 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-04-06 18:49:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:34,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374249438] [2022-04-06 18:49:34,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 2 times [2022-04-06 18:49:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:34,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365515989] [2022-04-06 18:49:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:49:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:34,314 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 18:49:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365515989] [2022-04-06 18:49:34,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365515989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:34,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:34,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:34,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374249438] [2022-04-06 18:49:34,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374249438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:34,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415613537] [2022-04-06 18:49:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:34,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:34,316 INFO L87 Difference]: Start difference. First operand 777 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:36,046 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2022-04-06 18:49:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:49:36,046 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 18:49:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:36,048 INFO L225 Difference]: With dead ends: 799 [2022-04-06 18:49:36,048 INFO L226 Difference]: Without dead ends: 775 [2022-04-06 18:49:36,049 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 18:49:36,049 INFO L913 BasicCegarLoop]: 535 mSDtfsCounter, 366 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:36,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1765 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:49:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-04-06 18:49:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-04-06 18:49:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 607 states have (on average 1.3097199341021417) internal successors, (795), 619 states have internal predecessors, (795), 98 states have call successors, (98), 51 states have call predecessors, (98), 69 states have return successors, (125), 111 states have call predecessors, (125), 93 states have call successors, (125) [2022-04-06 18:49:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1018 transitions. [2022-04-06 18:49:36,221 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1018 transitions. Word has length 60 [2022-04-06 18:49:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:36,221 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1018 transitions. [2022-04-06 18:49:36,221 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 18:49:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1018 transitions. [2022-04-06 18:49:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:49:36,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:36,222 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 18:49:36,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 18:49:36,222 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-04-06 18:49:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402481455] [2022-04-06 18:49:36,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 2 times [2022-04-06 18:49:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458099989] [2022-04-06 18:49:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:36,439 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 18:49:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458099989] [2022-04-06 18:49:36,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458099989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:36,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:36,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:36,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402481455] [2022-04-06 18:49:36,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402481455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:36,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:36,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:36,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992910604] [2022-04-06 18:49:36,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:36,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:36,441 INFO L87 Difference]: Start difference. First operand 775 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:49:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:38,283 INFO L93 Difference]: Finished difference Result 837 states and 1087 transitions. [2022-04-06 18:49:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:38,283 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 18:49:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:38,285 INFO L225 Difference]: With dead ends: 837 [2022-04-06 18:49:38,285 INFO L226 Difference]: Without dead ends: 767 [2022-04-06 18:49:38,286 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 18:49:38,286 INFO L913 BasicCegarLoop]: 529 mSDtfsCounter, 659 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 4202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:38,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1765 Invalid, 4202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3968 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:49:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-04-06 18:49:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-04-06 18:49:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 601 states have (on average 1.302828618968386) internal successors, (783), 613 states have internal predecessors, (783), 96 states have call successors, (96), 51 states have call predecessors, (96), 69 states have return successors, (123), 109 states have call predecessors, (123), 91 states have call successors, (123) [2022-04-06 18:49:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1002 transitions. [2022-04-06 18:49:38,467 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1002 transitions. Word has length 60 [2022-04-06 18:49:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:38,467 INFO L478 AbstractCegarLoop]: Abstraction has 767 states and 1002 transitions. [2022-04-06 18:49:38,467 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 18:49:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1002 transitions. [2022-04-06 18:49:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 18:49:38,469 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:38,469 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 18:49:38,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 18:49:38,469 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-04-06 18:49:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292067280] [2022-04-06 18:49:38,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:38,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 2 times [2022-04-06 18:49:38,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576709544] [2022-04-06 18:49:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:38,609 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 18:49:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:38,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576709544] [2022-04-06 18:49:38,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576709544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:38,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:38,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292067280] [2022-04-06 18:49:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292067280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:38,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243297162] [2022-04-06 18:49:38,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:38,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:38,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:38,611 INFO L87 Difference]: Start difference. First operand 767 states and 1002 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:39,984 INFO L93 Difference]: Finished difference Result 813 states and 1068 transitions. [2022-04-06 18:49:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:39,985 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 18:49:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:39,987 INFO L225 Difference]: With dead ends: 813 [2022-04-06 18:49:39,987 INFO L226 Difference]: Without dead ends: 779 [2022-04-06 18:49:39,987 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 18:49:39,990 INFO L913 BasicCegarLoop]: 518 mSDtfsCounter, 636 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:39,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 1123 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:49:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-04-06 18:49:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 771. [2022-04-06 18:49:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 603 states have (on average 1.3018242122719734) internal successors, (785), 617 states have internal predecessors, (785), 96 states have call successors, (96), 51 states have call predecessors, (96), 71 states have return successors, (139), 109 states have call predecessors, (139), 91 states have call successors, (139) [2022-04-06 18:49:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1020 transitions. [2022-04-06 18:49:40,153 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1020 transitions. Word has length 61 [2022-04-06 18:49:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:40,153 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1020 transitions. [2022-04-06 18:49:40,153 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 18:49:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1020 transitions. [2022-04-06 18:49:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:49:40,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:40,155 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 18:49:40,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 18:49:40,155 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-04-06 18:49:40,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:40,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122938688] [2022-04-06 18:49:40,155 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 2 times [2022-04-06 18:49:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514570554] [2022-04-06 18:49:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:40,458 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 18:49:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514570554] [2022-04-06 18:49:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514570554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:40,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:40,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:40,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122938688] [2022-04-06 18:49:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122938688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:40,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:40,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693309126] [2022-04-06 18:49:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:40,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:49:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:49:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:40,460 INFO L87 Difference]: Start difference. First operand 771 states and 1020 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:42,780 INFO L93 Difference]: Finished difference Result 788 states and 1038 transitions. [2022-04-06 18:49:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:49:42,780 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 18:49:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:42,783 INFO L225 Difference]: With dead ends: 788 [2022-04-06 18:49:42,783 INFO L226 Difference]: Without dead ends: 766 [2022-04-06 18:49:42,784 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 18:49:42,784 INFO L913 BasicCegarLoop]: 531 mSDtfsCounter, 883 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 5376 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 5686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 5376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:42,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 2405 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 5376 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 18:49:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-04-06 18:49:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-04-06 18:49:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 600 states have (on average 1.3016666666666667) internal successors, (781), 614 states have internal predecessors, (781), 95 states have call successors, (95), 51 states have call predecessors, (95), 70 states have return successors, (137), 107 states have call predecessors, (137), 90 states have call successors, (137) [2022-04-06 18:49:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1013 transitions. [2022-04-06 18:49:42,947 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1013 transitions. Word has length 63 [2022-04-06 18:49:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:42,947 INFO L478 AbstractCegarLoop]: Abstraction has 766 states and 1013 transitions. [2022-04-06 18:49:42,947 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 18:49:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1013 transitions. [2022-04-06 18:49:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:49:42,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:42,949 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] [2022-04-06 18:49:42,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 18:49:42,949 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-04-06 18:49:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:42,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1877271881] [2022-04-06 18:49:42,950 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 2 times [2022-04-06 18:49:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420548344] [2022-04-06 18:49:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:43,170 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 18:49:43,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:43,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420548344] [2022-04-06 18:49:43,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420548344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:43,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:43,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:43,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:43,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1877271881] [2022-04-06 18:49:43,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1877271881] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:43,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:43,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:49:43,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26247193] [2022-04-06 18:49:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:43,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:49:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:49:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:49:43,172 INFO L87 Difference]: Start difference. First operand 766 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:49:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:45,142 INFO L93 Difference]: Finished difference Result 783 states and 1031 transitions. [2022-04-06 18:49:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:49:45,142 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 18:49:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:45,144 INFO L225 Difference]: With dead ends: 783 [2022-04-06 18:49:45,144 INFO L226 Difference]: Without dead ends: 761 [2022-04-06 18:49:45,145 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 18:49:45,145 INFO L913 BasicCegarLoop]: 521 mSDtfsCounter, 591 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 5407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:45,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 2230 Invalid, 5407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:49:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-04-06 18:49:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-04-06 18:49:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 597 states have (on average 1.3015075376884422) internal successors, (777), 611 states have internal predecessors, (777), 94 states have call successors, (94), 51 states have call predecessors, (94), 69 states have return successors, (135), 105 states have call predecessors, (135), 89 states have call successors, (135) [2022-04-06 18:49:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1006 transitions. [2022-04-06 18:49:45,317 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1006 transitions. Word has length 62 [2022-04-06 18:49:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:45,317 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 1006 transitions. [2022-04-06 18:49:45,317 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 18:49:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1006 transitions. [2022-04-06 18:49:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:49:45,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:45,319 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 18:49:45,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 18:49:45,319 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-04-06 18:49:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1036974218] [2022-04-06 18:49:45,319 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 2 times [2022-04-06 18:49:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101528110] [2022-04-06 18:49:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,594 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 18:49:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101528110] [2022-04-06 18:49:45,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101528110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:45,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:45,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:45,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1036974218] [2022-04-06 18:49:45,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1036974218] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:45,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:45,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150818551] [2022-04-06 18:49:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:45,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:49:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:49:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:45,597 INFO L87 Difference]: Start difference. First operand 761 states and 1006 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:49:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:47,761 INFO L93 Difference]: Finished difference Result 785 states and 1031 transitions. [2022-04-06 18:49:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:49:47,762 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 18:49:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:47,764 INFO L225 Difference]: With dead ends: 785 [2022-04-06 18:49:47,764 INFO L226 Difference]: Without dead ends: 761 [2022-04-06 18:49:47,764 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 18:49:47,765 INFO L913 BasicCegarLoop]: 516 mSDtfsCounter, 1780 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 4873 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 5497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:47,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2243 Invalid, 5497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4873 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:49:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-04-06 18:49:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 759. [2022-04-06 18:49:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 596 states have (on average 1.3003355704697988) internal successors, (775), 610 states have internal predecessors, (775), 93 states have call successors, (93), 51 states have call predecessors, (93), 69 states have return successors, (134), 104 states have call predecessors, (134), 88 states have call successors, (134) [2022-04-06 18:49:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1002 transitions. [2022-04-06 18:49:47,934 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1002 transitions. Word has length 67 [2022-04-06 18:49:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:47,935 INFO L478 AbstractCegarLoop]: Abstraction has 759 states and 1002 transitions. [2022-04-06 18:49:47,935 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 18:49:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1002 transitions. [2022-04-06 18:49:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:49:47,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:47,936 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 18:49:47,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-06 18:49:47,936 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-04-06 18:49:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582776420] [2022-04-06 18:49:47,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 2 times [2022-04-06 18:49:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:47,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451335585] [2022-04-06 18:49:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:47,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:47,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:49:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:48,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451335585] [2022-04-06 18:49:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451335585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:48,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582776420] [2022-04-06 18:49:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582776420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:49:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809734944] [2022-04-06 18:49:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:48,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:49:48,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:49:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:48,153 INFO L87 Difference]: Start difference. First operand 759 states and 1002 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:50,331 INFO L93 Difference]: Finished difference Result 781 states and 1025 transitions. [2022-04-06 18:49:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:49:50,331 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 18:49:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:50,333 INFO L225 Difference]: With dead ends: 781 [2022-04-06 18:49:50,333 INFO L226 Difference]: Without dead ends: 757 [2022-04-06 18:49:50,334 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 18:49:50,334 INFO L913 BasicCegarLoop]: 493 mSDtfsCounter, 1456 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 5076 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 5076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:50,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2140 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 5076 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 18:49:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-04-06 18:49:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2022-04-06 18:49:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 595 states have (on average 1.2991596638655463) internal successors, (773), 609 states have internal predecessors, (773), 92 states have call successors, (92), 51 states have call predecessors, (92), 69 states have return successors, (133), 103 states have call predecessors, (133), 87 states have call successors, (133) [2022-04-06 18:49:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 998 transitions. [2022-04-06 18:49:50,505 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 998 transitions. Word has length 63 [2022-04-06 18:49:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:50,506 INFO L478 AbstractCegarLoop]: Abstraction has 757 states and 998 transitions. [2022-04-06 18:49:50,506 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 18:49:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 998 transitions. [2022-04-06 18:49:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:49:50,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:50,507 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 18:49:50,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-06 18:49:50,507 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-04-06 18:49:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314450803] [2022-04-06 18:49:50,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 2 times [2022-04-06 18:49:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:50,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022013957] [2022-04-06 18:49:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:49:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,628 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 18:49:50,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022013957] [2022-04-06 18:49:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022013957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:50,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314450803] [2022-04-06 18:49:50,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314450803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684875705] [2022-04-06 18:49:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:50,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:50,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:50,630 INFO L87 Difference]: Start difference. First operand 757 states and 998 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:51,544 INFO L93 Difference]: Finished difference Result 1021 states and 1347 transitions. [2022-04-06 18:49:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:49:51,545 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 18:49:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:51,548 INFO L225 Difference]: With dead ends: 1021 [2022-04-06 18:49:51,548 INFO L226 Difference]: Without dead ends: 702 [2022-04-06 18:49:51,549 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 18:49:51,549 INFO L913 BasicCegarLoop]: 487 mSDtfsCounter, 1149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:51,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 863 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-04-06 18:49:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2022-04-06 18:49:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.2925925925925925) internal successors, (698), 552 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-04-06 18:49:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 882 transitions. [2022-04-06 18:49:51,695 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 882 transitions. Word has length 63 [2022-04-06 18:49:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:51,696 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 882 transitions. [2022-04-06 18:49:51,696 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 18:49:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 882 transitions. [2022-04-06 18:49:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:51,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:51,697 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 18:49:51,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-06 18:49:51,697 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-04-06 18:49:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089419030] [2022-04-06 18:49:51,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 2 times [2022-04-06 18:49:51,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:51,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144245785] [2022-04-06 18:49:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:49:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:51,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144245785] [2022-04-06 18:49:51,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144245785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:51,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:51,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:51,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089419030] [2022-04-06 18:49:51,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089419030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:51,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:51,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696933895] [2022-04-06 18:49:51,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:51,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:51,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:51,813 INFO L87 Difference]: Start difference. First operand 685 states and 882 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 18:49:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:52,850 INFO L93 Difference]: Finished difference Result 805 states and 1038 transitions. [2022-04-06 18:49:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:49:52,850 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 18:49:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:52,852 INFO L225 Difference]: With dead ends: 805 [2022-04-06 18:49:52,852 INFO L226 Difference]: Without dead ends: 685 [2022-04-06 18:49:52,852 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 18:49:52,852 INFO L913 BasicCegarLoop]: 463 mSDtfsCounter, 338 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:52,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 849 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-04-06 18:49:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-04-06 18:49:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.288888888888889) internal successors, (696), 552 states have internal predecessors, (696), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-04-06 18:49:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-04-06 18:49:52,999 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 66 [2022-04-06 18:49:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:52,999 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-04-06 18:49:52,999 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 18:49:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-04-06 18:49:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:53,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:53,001 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 18:49:53,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-06 18:49:53,001 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-04-06 18:49:53,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:53,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600236702] [2022-04-06 18:49:53,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 2 times [2022-04-06 18:49:53,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:53,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726485657] [2022-04-06 18:49:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:53,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:49:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:49:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726485657] [2022-04-06 18:49:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726485657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:53,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:53,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600236702] [2022-04-06 18:49:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600236702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:53,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:49:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623182372] [2022-04-06 18:49:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:53,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:49:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:49:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:49:53,268 INFO L87 Difference]: Start difference. First operand 685 states and 880 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:49:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:55,367 INFO L93 Difference]: Finished difference Result 707 states and 903 transitions. [2022-04-06 18:49:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:49:55,367 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 18:49:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:55,369 INFO L225 Difference]: With dead ends: 707 [2022-04-06 18:49:55,369 INFO L226 Difference]: Without dead ends: 683 [2022-04-06 18:49:55,369 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 18:49:55,369 INFO L913 BasicCegarLoop]: 470 mSDtfsCounter, 1194 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 5234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:55,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 2045 Invalid, 5234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 18:49:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-04-06 18:49:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-04-06 18:49:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 539 states have (on average 1.287569573283859) internal successors, (694), 551 states have internal predecessors, (694), 81 states have call successors, (81), 47 states have call predecessors, (81), 62 states have return successors, (101), 91 states have call predecessors, (101), 76 states have call successors, (101) [2022-04-06 18:49:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 876 transitions. [2022-04-06 18:49:55,516 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 876 transitions. Word has length 66 [2022-04-06 18:49:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:55,517 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 876 transitions. [2022-04-06 18:49:55,517 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 18:49:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 876 transitions. [2022-04-06 18:49:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 18:49:55,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:55,518 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:55,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-06 18:49:55,518 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-04-06 18:49:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:55,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907476293] [2022-04-06 18:49:55,519 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 2 times [2022-04-06 18:49:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:55,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314435316] [2022-04-06 18:49:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:49:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:49:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,702 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 18:49:55,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314435316] [2022-04-06 18:49:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314435316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:55,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:55,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:55,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907476293] [2022-04-06 18:49:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907476293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:55,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:55,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149170726] [2022-04-06 18:49:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:55,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:55,703 INFO L87 Difference]: Start difference. First operand 683 states and 876 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 18:49:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:56,888 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2022-04-06 18:49:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:49:56,888 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 18:49:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:56,890 INFO L225 Difference]: With dead ends: 747 [2022-04-06 18:49:56,890 INFO L226 Difference]: Without dead ends: 714 [2022-04-06 18:49:56,891 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 18:49:56,891 INFO L913 BasicCegarLoop]: 467 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:56,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 863 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-04-06 18:49:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-04-06 18:49:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.286764705882353) internal successors, (700), 556 states have internal predecessors, (700), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-04-06 18:49:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 884 transitions. [2022-04-06 18:49:57,055 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 884 transitions. Word has length 65 [2022-04-06 18:49:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:57,055 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 884 transitions. [2022-04-06 18:49:57,055 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 18:49:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 884 transitions. [2022-04-06 18:49:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:57,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:57,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:57,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-06 18:49:57,057 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-04-06 18:49:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:57,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152411457] [2022-04-06 18:49:57,057 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 2 times [2022-04-06 18:49:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:57,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905608550] [2022-04-06 18:49:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:49:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,209 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 18:49:57,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905608550] [2022-04-06 18:49:57,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905608550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:57,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:57,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:57,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152411457] [2022-04-06 18:49:57,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152411457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:57,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:57,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:57,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563268744] [2022-04-06 18:49:57,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:57,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:57,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:57,211 INFO L87 Difference]: Start difference. First operand 689 states and 884 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:49:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:58,287 INFO L93 Difference]: Finished difference Result 745 states and 945 transitions. [2022-04-06 18:49:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:49:58,287 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 18:49:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:58,289 INFO L225 Difference]: With dead ends: 745 [2022-04-06 18:49:58,289 INFO L226 Difference]: Without dead ends: 691 [2022-04-06 18:49:58,289 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 18:49:58,289 INFO L913 BasicCegarLoop]: 474 mSDtfsCounter, 615 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:58,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 997 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-04-06 18:49:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-04-06 18:49:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.2830882352941178) internal successors, (698), 556 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-04-06 18:49:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 882 transitions. [2022-04-06 18:49:58,438 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 882 transitions. Word has length 66 [2022-04-06 18:49:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:58,438 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 882 transitions. [2022-04-06 18:49:58,439 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 18:49:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 882 transitions. [2022-04-06 18:49:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 18:49:58,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:58,440 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 18:49:58,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-06 18:49:58,440 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-04-06 18:49:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650940721] [2022-04-06 18:49:58,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 2 times [2022-04-06 18:49:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:58,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222000084] [2022-04-06 18:49:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:49:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:49:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:49:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:58,622 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 18:49:58,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:58,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222000084] [2022-04-06 18:49:58,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222000084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:58,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:58,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:58,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650940721] [2022-04-06 18:49:58,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650940721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:58,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:58,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:49:58,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517988749] [2022-04-06 18:49:58,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:58,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:49:58,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:58,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:49:58,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:49:58,624 INFO L87 Difference]: Start difference. First operand 689 states and 882 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:00,401 INFO L93 Difference]: Finished difference Result 716 states and 912 transitions. [2022-04-06 18:50:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:00,401 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 18:50:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:00,403 INFO L225 Difference]: With dead ends: 716 [2022-04-06 18:50:00,403 INFO L226 Difference]: Without dead ends: 658 [2022-04-06 18:50:00,404 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 18:50:00,404 INFO L913 BasicCegarLoop]: 477 mSDtfsCounter, 361 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 3605 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 3734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:00,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1641 Invalid, 3734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3605 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:50:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-04-06 18:50:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2022-04-06 18:50:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 514 states have (on average 1.2684824902723735) internal successors, (652), 526 states have internal predecessors, (652), 75 states have call successors, (75), 47 states have call predecessors, (75), 62 states have return successors, (94), 85 states have call predecessors, (94), 70 states have call successors, (94) [2022-04-06 18:50:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-04-06 18:50:00,544 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 66 [2022-04-06 18:50:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:00,545 INFO L478 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-04-06 18:50:00,545 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 18:50:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-04-06 18:50:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:50:00,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:00,546 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 18:50:00,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-06 18:50:00,546 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-04-06 18:50:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010610923] [2022-04-06 18:50:00,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 2 times [2022-04-06 18:50:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862826572] [2022-04-06 18:50:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 18:50:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,702 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 18:50:00,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862826572] [2022-04-06 18:50:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862826572] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:00,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:00,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010610923] [2022-04-06 18:50:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010610923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:00,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:00,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790281984] [2022-04-06 18:50:00,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:00,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:00,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:00,703 INFO L87 Difference]: Start difference. First operand 652 states and 821 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:01,703 INFO L93 Difference]: Finished difference Result 686 states and 856 transitions. [2022-04-06 18:50:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:01,704 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 18:50:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:01,705 INFO L225 Difference]: With dead ends: 686 [2022-04-06 18:50:01,705 INFO L226 Difference]: Without dead ends: 647 [2022-04-06 18:50:01,706 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 18:50:01,706 INFO L913 BasicCegarLoop]: 424 mSDtfsCounter, 510 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:01,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1027 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-04-06 18:50:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-04-06 18:50:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 510 states have (on average 1.268627450980392) internal successors, (647), 522 states have internal predecessors, (647), 74 states have call successors, (74), 47 states have call predecessors, (74), 62 states have return successors, (93), 84 states have call predecessors, (93), 69 states have call successors, (93) [2022-04-06 18:50:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 814 transitions. [2022-04-06 18:50:01,836 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 814 transitions. Word has length 67 [2022-04-06 18:50:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:01,836 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 814 transitions. [2022-04-06 18:50:01,836 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 18:50:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 814 transitions. [2022-04-06 18:50:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 18:50:01,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:01,837 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 18:50:01,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-06 18:50:01,840 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-04-06 18:50:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053664923] [2022-04-06 18:50:01,841 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 2 times [2022-04-06 18:50:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144729253] [2022-04-06 18:50:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:01,987 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 18:50:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144729253] [2022-04-06 18:50:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144729253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:01,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:01,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:01,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053664923] [2022-04-06 18:50:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053664923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:01,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:01,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:01,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383045937] [2022-04-06 18:50:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:01,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:01,989 INFO L87 Difference]: Start difference. First operand 647 states and 814 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:50:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:03,086 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2022-04-06 18:50:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:03,090 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 18:50:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:03,092 INFO L225 Difference]: With dead ends: 771 [2022-04-06 18:50:03,093 INFO L226 Difference]: Without dead ends: 763 [2022-04-06 18:50:03,093 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 18:50:03,093 INFO L913 BasicCegarLoop]: 453 mSDtfsCounter, 907 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:03,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 925 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-04-06 18:50:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 689. [2022-04-06 18:50:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2619926199261993) internal successors, (684), 556 states have internal predecessors, (684), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-04-06 18:50:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 861 transitions. [2022-04-06 18:50:03,252 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 861 transitions. Word has length 67 [2022-04-06 18:50:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:03,252 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 861 transitions. [2022-04-06 18:50:03,252 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 18:50:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 861 transitions. [2022-04-06 18:50:03,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 18:50:03,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:03,254 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 18:50:03,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-06 18:50:03,254 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-04-06 18:50:03,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:03,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664602983] [2022-04-06 18:50:03,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 2 times [2022-04-06 18:50:03,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:03,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163960451] [2022-04-06 18:50:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,402 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 18:50:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:03,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163960451] [2022-04-06 18:50:03,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163960451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:03,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:03,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:03,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664602983] [2022-04-06 18:50:03,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664602983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:03,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:03,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057118028] [2022-04-06 18:50:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:03,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:03,404 INFO L87 Difference]: Start difference. First operand 689 states and 861 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:04,649 INFO L93 Difference]: Finished difference Result 767 states and 959 transitions. [2022-04-06 18:50:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:04,649 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 18:50:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:04,651 INFO L225 Difference]: With dead ends: 767 [2022-04-06 18:50:04,651 INFO L226 Difference]: Without dead ends: 761 [2022-04-06 18:50:04,652 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 18:50:04,652 INFO L913 BasicCegarLoop]: 455 mSDtfsCounter, 1189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:04,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 821 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-04-06 18:50:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 689. [2022-04-06 18:50:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2601476014760147) internal successors, (683), 556 states have internal predecessors, (683), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-04-06 18:50:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 860 transitions. [2022-04-06 18:50:04,827 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 860 transitions. Word has length 68 [2022-04-06 18:50:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:04,827 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 860 transitions. [2022-04-06 18:50:04,827 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 18:50:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 860 transitions. [2022-04-06 18:50:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 18:50:04,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:04,828 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 18:50:04,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-06 18:50:04,829 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-04-06 18:50:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306068138] [2022-04-06 18:50:04,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 2 times [2022-04-06 18:50:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102958997] [2022-04-06 18:50:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:50:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:05,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:05,088 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 18:50:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102958997] [2022-04-06 18:50:05,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102958997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:05,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:05,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:05,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306068138] [2022-04-06 18:50:05,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306068138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:05,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:05,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401081203] [2022-04-06 18:50:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:05,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:50:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:50:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:50:05,090 INFO L87 Difference]: Start difference. First operand 689 states and 860 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 18:50:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:07,051 INFO L93 Difference]: Finished difference Result 722 states and 899 transitions. [2022-04-06 18:50:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:50:07,051 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 18:50:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:07,053 INFO L225 Difference]: With dead ends: 722 [2022-04-06 18:50:07,053 INFO L226 Difference]: Without dead ends: 698 [2022-04-06 18:50:07,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:50:07,054 INFO L913 BasicCegarLoop]: 434 mSDtfsCounter, 311 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 4560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:07,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2211 Invalid, 4560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4451 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:50:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-04-06 18:50:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 687. [2022-04-06 18:50:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 541 states have (on average 1.2587800369685767) internal successors, (681), 555 states have internal predecessors, (681), 75 states have call successors, (75), 49 states have call predecessors, (75), 70 states have return successors, (100), 91 states have call predecessors, (100), 70 states have call successors, (100) [2022-04-06 18:50:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2022-04-06 18:50:07,206 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 74 [2022-04-06 18:50:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:07,207 INFO L478 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2022-04-06 18:50:07,207 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 18:50:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2022-04-06 18:50:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 18:50:07,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:07,208 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 18:50:07,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-06 18:50:07,208 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-04-06 18:50:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:07,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [679721307] [2022-04-06 18:50:07,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 2 times [2022-04-06 18:50:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:07,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744810536] [2022-04-06 18:50:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:07,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:50:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,511 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 18:50:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744810536] [2022-04-06 18:50:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744810536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:07,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:07,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:50:07,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [679721307] [2022-04-06 18:50:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [679721307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:07,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:07,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:50:07,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390773876] [2022-04-06 18:50:07,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:07,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:50:07,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:50:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:50:07,513 INFO L87 Difference]: Start difference. First operand 687 states and 856 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:50:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:09,531 INFO L93 Difference]: Finished difference Result 711 states and 882 transitions. [2022-04-06 18:50:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:50:09,532 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 18:50:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:09,534 INFO L225 Difference]: With dead ends: 711 [2022-04-06 18:50:09,534 INFO L226 Difference]: Without dead ends: 684 [2022-04-06 18:50:09,534 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 18:50:09,535 INFO L913 BasicCegarLoop]: 426 mSDtfsCounter, 789 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 4845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:09,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2268 Invalid, 4845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:50:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-04-06 18:50:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-04-06 18:50:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 539 states have (on average 1.2578849721706864) internal successors, (678), 553 states have internal predecessors, (678), 74 states have call successors, (74), 49 states have call predecessors, (74), 70 states have return successors, (99), 90 states have call predecessors, (99), 69 states have call successors, (99) [2022-04-06 18:50:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 851 transitions. [2022-04-06 18:50:09,700 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 851 transitions. Word has length 70 [2022-04-06 18:50:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:09,700 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 851 transitions. [2022-04-06 18:50:09,700 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 18:50:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 851 transitions. [2022-04-06 18:50:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 18:50:09,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:09,701 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, 1, 1, 1, 1] [2022-04-06 18:50:09,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-06 18:50:09,701 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-04-06 18:50:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:09,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869818381] [2022-04-06 18:50:09,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 2 times [2022-04-06 18:50:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:09,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404318792] [2022-04-06 18:50:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,994 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 18:50:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:09,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404318792] [2022-04-06 18:50:09,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404318792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:09,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:09,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:09,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:09,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869818381] [2022-04-06 18:50:09,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869818381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:09,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:09,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342837617] [2022-04-06 18:50:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:09,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:50:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:50:09,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:09,996 INFO L87 Difference]: Start difference. First operand 684 states and 851 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:50:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:11,741 INFO L93 Difference]: Finished difference Result 704 states and 872 transitions. [2022-04-06 18:50:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:11,742 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 18:50:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:11,743 INFO L225 Difference]: With dead ends: 704 [2022-04-06 18:50:11,743 INFO L226 Difference]: Without dead ends: 682 [2022-04-06 18:50:11,744 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 18:50:11,744 INFO L913 BasicCegarLoop]: 421 mSDtfsCounter, 465 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:11,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 2031 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 18:50:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-04-06 18:50:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-04-06 18:50:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 538 states have (on average 1.2565055762081785) internal successors, (676), 552 states have internal predecessors, (676), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (98), 89 states have call predecessors, (98), 68 states have call successors, (98) [2022-04-06 18:50:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 847 transitions. [2022-04-06 18:50:11,891 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 847 transitions. Word has length 72 [2022-04-06 18:50:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:11,891 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 847 transitions. [2022-04-06 18:50:11,891 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 18:50:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 847 transitions. [2022-04-06 18:50:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:50:11,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:11,892 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 18:50:11,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-06 18:50:11,893 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-04-06 18:50:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220941884] [2022-04-06 18:50:11,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 2 times [2022-04-06 18:50:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958501927] [2022-04-06 18:50:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:50:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,183 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 18:50:12,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958501927] [2022-04-06 18:50:12,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958501927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:12,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:12,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:12,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:12,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220941884] [2022-04-06 18:50:12,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220941884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:12,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:12,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444494403] [2022-04-06 18:50:12,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:12,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:50:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:50:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:12,185 INFO L87 Difference]: Start difference. First operand 682 states and 847 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:50:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:13,972 INFO L93 Difference]: Finished difference Result 699 states and 865 transitions. [2022-04-06 18:50:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:13,972 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 18:50:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:13,974 INFO L225 Difference]: With dead ends: 699 [2022-04-06 18:50:13,974 INFO L226 Difference]: Without dead ends: 670 [2022-04-06 18:50:13,975 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 18:50:13,975 INFO L913 BasicCegarLoop]: 414 mSDtfsCounter, 689 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 4417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:13,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 2003 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 18:50:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-04-06 18:50:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-04-06 18:50:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 529 states have (on average 1.2570888468809074) internal successors, (665), 543 states have internal predecessors, (665), 71 states have call successors, (71), 49 states have call predecessors, (71), 69 states have return successors, (95), 86 states have call predecessors, (95), 66 states have call successors, (95) [2022-04-06 18:50:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 831 transitions. [2022-04-06 18:50:14,131 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 831 transitions. Word has length 69 [2022-04-06 18:50:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:14,131 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 831 transitions. [2022-04-06 18:50:14,131 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 18:50:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 831 transitions. [2022-04-06 18:50:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:50:14,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:14,132 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 18:50:14,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-04-06 18:50:14,133 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-04-06 18:50:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864200400] [2022-04-06 18:50:14,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 2 times [2022-04-06 18:50:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230600221] [2022-04-06 18:50:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230600221] [2022-04-06 18:50:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230600221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:14,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:14,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:14,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864200400] [2022-04-06 18:50:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864200400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:14,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:14,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348058169] [2022-04-06 18:50:14,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:14,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:14,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:14,268 INFO L87 Difference]: Start difference. First operand 670 states and 831 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:15,358 INFO L93 Difference]: Finished difference Result 704 states and 866 transitions. [2022-04-06 18:50:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:15,358 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 18:50:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:15,360 INFO L225 Difference]: With dead ends: 704 [2022-04-06 18:50:15,360 INFO L226 Difference]: Without dead ends: 665 [2022-04-06 18:50:15,361 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 18:50:15,361 INFO L913 BasicCegarLoop]: 395 mSDtfsCounter, 703 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:15,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 981 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-04-06 18:50:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-04-06 18:50:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 525 states have (on average 1.2571428571428571) internal successors, (660), 539 states have internal predecessors, (660), 70 states have call successors, (70), 49 states have call predecessors, (70), 69 states have return successors, (94), 85 states have call predecessors, (94), 65 states have call successors, (94) [2022-04-06 18:50:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 824 transitions. [2022-04-06 18:50:15,527 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 824 transitions. Word has length 69 [2022-04-06 18:50:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:15,528 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 824 transitions. [2022-04-06 18:50:15,528 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 18:50:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 824 transitions. [2022-04-06 18:50:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:50:15,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:15,529 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 18:50:15,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-04-06 18:50:15,529 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-04-06 18:50:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638308484] [2022-04-06 18:50:15,529 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 2 times [2022-04-06 18:50:15,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:15,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730994605] [2022-04-06 18:50:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:50:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,758 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 18:50:15,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:15,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730994605] [2022-04-06 18:50:15,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730994605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:15,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:15,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:15,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:15,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638308484] [2022-04-06 18:50:15,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638308484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:15,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:15,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:15,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505383574] [2022-04-06 18:50:15,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:15,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:50:15,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:50:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:15,760 INFO L87 Difference]: Start difference. First operand 665 states and 824 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:17,401 INFO L93 Difference]: Finished difference Result 692 states and 854 transitions. [2022-04-06 18:50:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:50:17,401 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 18:50:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:17,403 INFO L225 Difference]: With dead ends: 692 [2022-04-06 18:50:17,403 INFO L226 Difference]: Without dead ends: 662 [2022-04-06 18:50:17,403 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 18:50:17,404 INFO L913 BasicCegarLoop]: 409 mSDtfsCounter, 260 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:17,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1932 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:50:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-04-06 18:50:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-04-06 18:50:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 523 states have (on average 1.2562141491395793) internal successors, (657), 537 states have internal predecessors, (657), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-04-06 18:50:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 819 transitions. [2022-04-06 18:50:17,545 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 819 transitions. Word has length 69 [2022-04-06 18:50:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:17,546 INFO L478 AbstractCegarLoop]: Abstraction has 662 states and 819 transitions. [2022-04-06 18:50:17,546 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 18:50:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 819 transitions. [2022-04-06 18:50:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:50:17,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:17,547 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 18:50:17,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-04-06 18:50:17,547 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-04-06 18:50:17,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:17,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [5641710] [2022-04-06 18:50:17,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 2 times [2022-04-06 18:50:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:17,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57545444] [2022-04-06 18:50:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,750 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 18:50:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57545444] [2022-04-06 18:50:17,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57545444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:17,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:17,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:17,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [5641710] [2022-04-06 18:50:17,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [5641710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:17,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:17,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060220568] [2022-04-06 18:50:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:17,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:50:17,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:50:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:17,752 INFO L87 Difference]: Start difference. First operand 662 states and 819 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 18:50:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:19,263 INFO L93 Difference]: Finished difference Result 672 states and 828 transitions. [2022-04-06 18:50:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 18:50:19,264 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 18:50:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:19,265 INFO L225 Difference]: With dead ends: 672 [2022-04-06 18:50:19,265 INFO L226 Difference]: Without dead ends: 666 [2022-04-06 18:50:19,266 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 18:50:19,266 INFO L913 BasicCegarLoop]: 358 mSDtfsCounter, 748 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 3700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:19,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1544 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:50:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-04-06 18:50:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 660. [2022-04-06 18:50:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 521 states have (on average 1.2533589251439539) internal successors, (653), 535 states have internal predecessors, (653), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-04-06 18:50:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 815 transitions. [2022-04-06 18:50:19,407 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 815 transitions. Word has length 69 [2022-04-06 18:50:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:19,407 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 815 transitions. [2022-04-06 18:50:19,407 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 18:50:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 815 transitions. [2022-04-06 18:50:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 18:50:19,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:19,408 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] [2022-04-06 18:50:19,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-04-06 18:50:19,409 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-04-06 18:50:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:19,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861659928] [2022-04-06 18:50:19,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 2 times [2022-04-06 18:50:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:19,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190426045] [2022-04-06 18:50:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:19,587 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 18:50:19,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:19,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190426045] [2022-04-06 18:50:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190426045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:19,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:19,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:19,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861659928] [2022-04-06 18:50:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861659928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:19,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:19,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176291137] [2022-04-06 18:50:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:19,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:19,589 INFO L87 Difference]: Start difference. First operand 660 states and 815 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:20,923 INFO L93 Difference]: Finished difference Result 736 states and 910 transitions. [2022-04-06 18:50:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:20,923 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 18:50:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:20,925 INFO L225 Difference]: With dead ends: 736 [2022-04-06 18:50:20,925 INFO L226 Difference]: Without dead ends: 674 [2022-04-06 18:50:20,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:50:20,926 INFO L913 BasicCegarLoop]: 404 mSDtfsCounter, 925 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:20,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 802 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-04-06 18:50:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 604. [2022-04-06 18:50:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 475 states have (on average 1.2463157894736843) internal successors, (592), 487 states have internal predecessors, (592), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-04-06 18:50:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 744 transitions. [2022-04-06 18:50:21,067 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 744 transitions. Word has length 69 [2022-04-06 18:50:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:21,067 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 744 transitions. [2022-04-06 18:50:21,067 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 18:50:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 744 transitions. [2022-04-06 18:50:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:50:21,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:21,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:50:21,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-04-06 18:50:21,068 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-04-06 18:50:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710434265] [2022-04-06 18:50:21,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 2 times [2022-04-06 18:50:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:21,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381442873] [2022-04-06 18:50:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,327 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 18:50:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381442873] [2022-04-06 18:50:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381442873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:21,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:21,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:21,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710434265] [2022-04-06 18:50:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710434265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:21,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:21,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214133731] [2022-04-06 18:50:21,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:21,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:50:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:50:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:50:21,329 INFO L87 Difference]: Start difference. First operand 604 states and 744 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:50:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:23,070 INFO L93 Difference]: Finished difference Result 637 states and 783 transitions. [2022-04-06 18:50:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:50:23,071 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 18:50:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:23,079 INFO L225 Difference]: With dead ends: 637 [2022-04-06 18:50:23,079 INFO L226 Difference]: Without dead ends: 610 [2022-04-06 18:50:23,079 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 18:50:23,080 INFO L913 BasicCegarLoop]: 409 mSDtfsCounter, 1108 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 4001 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 4386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 4001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:23,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2199 Invalid, 4386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4001 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 18:50:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-04-06 18:50:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-04-06 18:50:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 477 states have (on average 1.2389937106918238) internal successors, (591), 489 states have internal predecessors, (591), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-04-06 18:50:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 743 transitions. [2022-04-06 18:50:23,215 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 743 transitions. Word has length 71 [2022-04-06 18:50:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:23,215 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 743 transitions. [2022-04-06 18:50:23,215 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 18:50:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 743 transitions. [2022-04-06 18:50:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:50:23,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:23,216 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 18:50:23,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-04-06 18:50:23,216 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-04-06 18:50:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464032027] [2022-04-06 18:50:23,217 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 2 times [2022-04-06 18:50:23,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:23,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402149897] [2022-04-06 18:50:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,373 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 18:50:23,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402149897] [2022-04-06 18:50:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402149897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:23,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:23,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:23,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464032027] [2022-04-06 18:50:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464032027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:23,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:23,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193131443] [2022-04-06 18:50:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:23,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:23,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:23,374 INFO L87 Difference]: Start difference. First operand 606 states and 743 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 18:50:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:24,481 INFO L93 Difference]: Finished difference Result 644 states and 782 transitions. [2022-04-06 18:50:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-04-06 18:50:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:24,482 INFO L225 Difference]: With dead ends: 644 [2022-04-06 18:50:24,482 INFO L226 Difference]: Without dead ends: 599 [2022-04-06 18:50:24,483 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 18:50:24,483 INFO L913 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:24,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1087 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-04-06 18:50:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-04-06 18:50:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.2399150743099787) internal successors, (584), 483 states have internal predecessors, (584), 66 states have call successors, (66), 47 states have call predecessors, (66), 61 states have return successors, (83), 75 states have call predecessors, (83), 61 states have call successors, (83) [2022-04-06 18:50:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 733 transitions. [2022-04-06 18:50:24,614 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 733 transitions. Word has length 71 [2022-04-06 18:50:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:24,615 INFO L478 AbstractCegarLoop]: Abstraction has 599 states and 733 transitions. [2022-04-06 18:50:24,615 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 18:50:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 733 transitions. [2022-04-06 18:50:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:50:24,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:24,616 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 18:50:24,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-04-06 18:50:24,616 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-04-06 18:50:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2077389760] [2022-04-06 18:50:24,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 2 times [2022-04-06 18:50:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402652910] [2022-04-06 18:50:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:24,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,775 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 18:50:24,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402652910] [2022-04-06 18:50:24,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402652910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:24,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:24,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:24,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:24,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2077389760] [2022-04-06 18:50:24,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2077389760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:24,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:24,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28227411] [2022-04-06 18:50:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:24,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:24,777 INFO L87 Difference]: Start difference. First operand 599 states and 733 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 18:50:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:25,773 INFO L93 Difference]: Finished difference Result 637 states and 772 transitions. [2022-04-06 18:50:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:25,773 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 18:50:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:25,774 INFO L225 Difference]: With dead ends: 637 [2022-04-06 18:50:25,775 INFO L226 Difference]: Without dead ends: 593 [2022-04-06 18:50:25,775 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 18:50:25,775 INFO L913 BasicCegarLoop]: 382 mSDtfsCounter, 623 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:25,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 949 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-04-06 18:50:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-04-06 18:50:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 466 states have (on average 1.240343347639485) internal successors, (578), 478 states have internal predecessors, (578), 65 states have call successors, (65), 47 states have call predecessors, (65), 61 states have return successors, (82), 74 states have call predecessors, (82), 60 states have call successors, (82) [2022-04-06 18:50:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 725 transitions. [2022-04-06 18:50:25,904 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 725 transitions. Word has length 71 [2022-04-06 18:50:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:25,904 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 725 transitions. [2022-04-06 18:50:25,904 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 18:50:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 725 transitions. [2022-04-06 18:50:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:50:25,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:25,905 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 18:50:25,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-04-06 18:50:25,905 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-04-06 18:50:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222864082] [2022-04-06 18:50:25,906 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 2 times [2022-04-06 18:50:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466417948] [2022-04-06 18:50:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:25,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:25,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:25,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,072 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 18:50:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466417948] [2022-04-06 18:50:26,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466417948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:26,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:26,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:26,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222864082] [2022-04-06 18:50:26,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222864082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:26,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:26,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:26,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827913173] [2022-04-06 18:50:26,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:26,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:26,074 INFO L87 Difference]: Start difference. First operand 593 states and 725 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 18:50:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:26,997 INFO L93 Difference]: Finished difference Result 631 states and 764 transitions. [2022-04-06 18:50:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:26,998 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 18:50:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:26,999 INFO L225 Difference]: With dead ends: 631 [2022-04-06 18:50:26,999 INFO L226 Difference]: Without dead ends: 581 [2022-04-06 18:50:26,999 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 18:50:27,000 INFO L913 BasicCegarLoop]: 373 mSDtfsCounter, 632 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:27,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 886 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-04-06 18:50:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-04-06 18:50:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 455 states have (on average 1.2351648351648352) internal successors, (562), 467 states have internal predecessors, (562), 64 states have call successors, (64), 47 states have call predecessors, (64), 61 states have return successors, (81), 73 states have call predecessors, (81), 59 states have call successors, (81) [2022-04-06 18:50:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 707 transitions. [2022-04-06 18:50:27,128 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 707 transitions. Word has length 73 [2022-04-06 18:50:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:27,129 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 707 transitions. [2022-04-06 18:50:27,129 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 18:50:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 707 transitions. [2022-04-06 18:50:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:50:27,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:27,130 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 18:50:27,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-04-06 18:50:27,130 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-04-06 18:50:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133728424] [2022-04-06 18:50:27,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 2 times [2022-04-06 18:50:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098005368] [2022-04-06 18:50:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,387 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 18:50:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098005368] [2022-04-06 18:50:27,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098005368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:27,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:27,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:27,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133728424] [2022-04-06 18:50:27,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133728424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:27,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:27,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73351916] [2022-04-06 18:50:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:27,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:50:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:50:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:27,388 INFO L87 Difference]: Start difference. First operand 581 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 18:50:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:30,439 INFO L93 Difference]: Finished difference Result 1245 states and 1510 transitions. [2022-04-06 18:50:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 18:50:30,439 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 18:50:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:30,442 INFO L225 Difference]: With dead ends: 1245 [2022-04-06 18:50:30,442 INFO L226 Difference]: Without dead ends: 1100 [2022-04-06 18:50:30,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 18:50:30,443 INFO L913 BasicCegarLoop]: 377 mSDtfsCounter, 2001 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 4443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:30,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1198 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 18:50:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-04-06 18:50:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 892. [2022-04-06 18:50:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 703 states have (on average 1.2574679943100995) internal successors, (884), 722 states have internal predecessors, (884), 95 states have call successors, (95), 74 states have call predecessors, (95), 93 states have return successors, (124), 102 states have call predecessors, (124), 90 states have call successors, (124) [2022-04-06 18:50:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1103 transitions. [2022-04-06 18:50:30,645 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1103 transitions. Word has length 73 [2022-04-06 18:50:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:30,645 INFO L478 AbstractCegarLoop]: Abstraction has 892 states and 1103 transitions. [2022-04-06 18:50:30,645 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 18:50:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1103 transitions. [2022-04-06 18:50:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:50:30,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:30,647 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 18:50:30,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-04-06 18:50:30,647 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-04-06 18:50:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:30,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1492310679] [2022-04-06 18:50:30,647 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 2 times [2022-04-06 18:50:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:30,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128480347] [2022-04-06 18:50:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:30,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:30,809 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 18:50:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128480347] [2022-04-06 18:50:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128480347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:30,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:30,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:30,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:30,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1492310679] [2022-04-06 18:50:30,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1492310679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:30,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:30,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:30,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257301718] [2022-04-06 18:50:30,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:30,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:30,811 INFO L87 Difference]: Start difference. First operand 892 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 18:50:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:32,474 INFO L93 Difference]: Finished difference Result 1149 states and 1395 transitions. [2022-04-06 18:50:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:50:32,474 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 18:50:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:32,476 INFO L225 Difference]: With dead ends: 1149 [2022-04-06 18:50:32,476 INFO L226 Difference]: Without dead ends: 1044 [2022-04-06 18:50:32,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-04-06 18:50:32,477 INFO L913 BasicCegarLoop]: 624 mSDtfsCounter, 2826 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:32,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 1160 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:50:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-04-06 18:50:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 985. [2022-04-06 18:50:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 776 states have (on average 1.2448453608247423) internal successors, (966), 790 states have internal predecessors, (966), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-04-06 18:50:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1215 transitions. [2022-04-06 18:50:32,730 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1215 transitions. Word has length 73 [2022-04-06 18:50:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:32,730 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1215 transitions. [2022-04-06 18:50:32,730 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 18:50:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1215 transitions. [2022-04-06 18:50:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 18:50:32,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:32,732 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:32,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-04-06 18:50:32,732 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-04-06 18:50:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:32,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725353440] [2022-04-06 18:50:32,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 2 times [2022-04-06 18:50:32,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107155969] [2022-04-06 18:50:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:50:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,989 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 18:50:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107155969] [2022-04-06 18:50:32,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107155969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:32,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:32,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:32,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725353440] [2022-04-06 18:50:32,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725353440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:32,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:32,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:50:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033938238] [2022-04-06 18:50:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:32,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:50:32,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:50:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:50:32,990 INFO L87 Difference]: Start difference. First operand 985 states and 1215 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 18:50:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:34,717 INFO L93 Difference]: Finished difference Result 1017 states and 1250 transitions. [2022-04-06 18:50:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:50:34,717 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 18:50:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:34,719 INFO L225 Difference]: With dead ends: 1017 [2022-04-06 18:50:34,719 INFO L226 Difference]: Without dead ends: 981 [2022-04-06 18:50:34,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:50:34,719 INFO L913 BasicCegarLoop]: 372 mSDtfsCounter, 565 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:34,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2183 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:50:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-04-06 18:50:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-04-06 18:50:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 772 states have (on average 1.2435233160621761) internal successors, (960), 786 states have internal predecessors, (960), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-04-06 18:50:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1209 transitions. [2022-04-06 18:50:34,963 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1209 transitions. Word has length 77 [2022-04-06 18:50:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:34,963 INFO L478 AbstractCegarLoop]: Abstraction has 981 states and 1209 transitions. [2022-04-06 18:50:34,963 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 18:50:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1209 transitions. [2022-04-06 18:50:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 18:50:34,965 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:34,965 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 18:50:34,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-04-06 18:50:34,965 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 1 times [2022-04-06 18:50:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145652828] [2022-04-06 18:50:34,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 2 times [2022-04-06 18:50:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:34,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18716766] [2022-04-06 18:50:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 18:50:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,144 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 18:50:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18716766] [2022-04-06 18:50:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18716766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:35,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:35,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:35,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145652828] [2022-04-06 18:50:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145652828] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:35,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:35,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316705753] [2022-04-06 18:50:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:35,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:35,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:35,145 INFO L87 Difference]: Start difference. First operand 981 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:50:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:36,349 INFO L93 Difference]: Finished difference Result 1034 states and 1265 transitions. [2022-04-06 18:50:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:36,349 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 18:50:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:36,352 INFO L225 Difference]: With dead ends: 1034 [2022-04-06 18:50:36,352 INFO L226 Difference]: Without dead ends: 947 [2022-04-06 18:50:36,353 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 18:50:36,353 INFO L913 BasicCegarLoop]: 347 mSDtfsCounter, 520 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:36,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1099 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-04-06 18:50:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-04-06 18:50:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 744 states have (on average 1.239247311827957) internal successors, (922), 758 states have internal predecessors, (922), 103 states have call successors, (103), 78 states have call predecessors, (103), 99 states have return successors, (132), 115 states have call predecessors, (132), 98 states have call successors, (132) [2022-04-06 18:50:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1157 transitions. [2022-04-06 18:50:36,587 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1157 transitions. Word has length 78 [2022-04-06 18:50:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:36,587 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1157 transitions. [2022-04-06 18:50:36,587 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 18:50:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1157 transitions. [2022-04-06 18:50:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 18:50:36,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:36,589 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 18:50:36,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-04-06 18:50:36,589 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:36,589 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-04-06 18:50:36,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:36,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774773456] [2022-04-06 18:50:36,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 2 times [2022-04-06 18:50:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:36,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326238079] [2022-04-06 18:50:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:36,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:50:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,787 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 18:50:36,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:36,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326238079] [2022-04-06 18:50:36,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326238079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:36,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:36,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:36,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774773456] [2022-04-06 18:50:36,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774773456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:36,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:36,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635636398] [2022-04-06 18:50:36,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:36,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:50:36,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:50:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:36,789 INFO L87 Difference]: Start difference. First operand 947 states and 1157 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:50:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:37,905 INFO L93 Difference]: Finished difference Result 976 states and 1185 transitions. [2022-04-06 18:50:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:37,906 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 18:50:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:37,907 INFO L225 Difference]: With dead ends: 976 [2022-04-06 18:50:37,907 INFO L226 Difference]: Without dead ends: 899 [2022-04-06 18:50:37,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:37,908 INFO L913 BasicCegarLoop]: 321 mSDtfsCounter, 203 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:37,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1048 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-04-06 18:50:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-04-06 18:50:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 710 states have (on average 1.2422535211267605) internal successors, (882), 724 states have internal predecessors, (882), 93 states have call successors, (93), 74 states have call predecessors, (93), 95 states have return successors, (120), 105 states have call predecessors, (120), 88 states have call successors, (120) [2022-04-06 18:50:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1095 transitions. [2022-04-06 18:50:38,116 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1095 transitions. Word has length 75 [2022-04-06 18:50:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:38,117 INFO L478 AbstractCegarLoop]: Abstraction has 899 states and 1095 transitions. [2022-04-06 18:50:38,117 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 18:50:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1095 transitions. [2022-04-06 18:50:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:50:38,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:38,118 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 18:50:38,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-04-06 18:50:38,118 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-04-06 18:50:38,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305645264] [2022-04-06 18:50:38,119 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:38,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 2 times [2022-04-06 18:50:38,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705057172] [2022-04-06 18:50:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:38,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 18:50:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 18:50:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,293 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 18:50:38,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705057172] [2022-04-06 18:50:38,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705057172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:38,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:38,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:38,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305645264] [2022-04-06 18:50:38,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305645264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:38,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:38,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:38,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991482073] [2022-04-06 18:50:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:38,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:38,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:38,294 INFO L87 Difference]: Start difference. First operand 899 states and 1095 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 18:50:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:39,088 INFO L93 Difference]: Finished difference Result 944 states and 1143 transitions. [2022-04-06 18:50:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:39,088 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 18:50:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:39,090 INFO L225 Difference]: With dead ends: 944 [2022-04-06 18:50:39,090 INFO L226 Difference]: Without dead ends: 883 [2022-04-06 18:50:39,090 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 18:50:39,090 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 307 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:39,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 857 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-04-06 18:50:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-04-06 18:50:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 696 states have (on average 1.2413793103448276) internal successors, (864), 710 states have internal predecessors, (864), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-04-06 18:50:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1071 transitions. [2022-04-06 18:50:39,315 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1071 transitions. Word has length 73 [2022-04-06 18:50:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:39,315 INFO L478 AbstractCegarLoop]: Abstraction has 883 states and 1071 transitions. [2022-04-06 18:50:39,315 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 18:50:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1071 transitions. [2022-04-06 18:50:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 18:50:39,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:39,317 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 18:50:39,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-04-06 18:50:39,317 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-04-06 18:50:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834053322] [2022-04-06 18:50:39,318 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 2 times [2022-04-06 18:50:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192920139] [2022-04-06 18:50:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:50:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 18:50:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192920139] [2022-04-06 18:50:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192920139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:39,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:39,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:39,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834053322] [2022-04-06 18:50:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834053322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:39,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:39,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216188988] [2022-04-06 18:50:39,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:39,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:39,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:39,509 INFO L87 Difference]: Start difference. First operand 883 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:50:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:40,327 INFO L93 Difference]: Finished difference Result 1161 states and 1426 transitions. [2022-04-06 18:50:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:50:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 77 [2022-04-06 18:50:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:40,329 INFO L225 Difference]: With dead ends: 1161 [2022-04-06 18:50:40,329 INFO L226 Difference]: Without dead ends: 869 [2022-04-06 18:50:40,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:50:40,330 INFO L913 BasicCegarLoop]: 297 mSDtfsCounter, 622 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:40,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 959 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-04-06 18:50:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-04-06 18:50:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 682 states have (on average 1.2346041055718475) internal successors, (842), 696 states have internal predecessors, (842), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-04-06 18:50:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1049 transitions. [2022-04-06 18:50:40,527 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1049 transitions. Word has length 77 [2022-04-06 18:50:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:40,527 INFO L478 AbstractCegarLoop]: Abstraction has 869 states and 1049 transitions. [2022-04-06 18:50:40,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 18:50:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1049 transitions. [2022-04-06 18:50:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 18:50:40,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:40,529 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:40,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-04-06 18:50:40,529 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-04-06 18:50:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:40,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912257717] [2022-04-06 18:50:40,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 2 times [2022-04-06 18:50:40,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:40,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989617608] [2022-04-06 18:50:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:40,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:50:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 18:50:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 18:50:40,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989617608] [2022-04-06 18:50:40,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989617608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:40,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:40,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:40,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912257717] [2022-04-06 18:50:40,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912257717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:40,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:40,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:40,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368292834] [2022-04-06 18:50:40,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:40,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:40,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:40,683 INFO L87 Difference]: Start difference. First operand 869 states and 1049 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 18:50:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:41,456 INFO L93 Difference]: Finished difference Result 914 states and 1097 transitions. [2022-04-06 18:50:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-04-06 18:50:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:41,458 INFO L225 Difference]: With dead ends: 914 [2022-04-06 18:50:41,458 INFO L226 Difference]: Without dead ends: 849 [2022-04-06 18:50:41,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:41,459 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 284 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:41,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 858 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-04-06 18:50:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-04-06 18:50:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 666 states have (on average 1.2342342342342343) internal successors, (822), 680 states have internal predecessors, (822), 87 states have call successors, (87), 74 states have call predecessors, (87), 95 states have return successors, (112), 99 states have call predecessors, (112), 82 states have call successors, (112) [2022-04-06 18:50:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1021 transitions. [2022-04-06 18:50:41,653 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1021 transitions. Word has length 75 [2022-04-06 18:50:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:41,653 INFO L478 AbstractCegarLoop]: Abstraction has 849 states and 1021 transitions. [2022-04-06 18:50:41,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 18:50:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1021 transitions. [2022-04-06 18:50:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 18:50:41,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:41,654 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:41,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-04-06 18:50:41,655 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-04-06 18:50:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358057421] [2022-04-06 18:50:41,655 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 2 times [2022-04-06 18:50:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604368804] [2022-04-06 18:50:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:41,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 18:50:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 18:50:41,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604368804] [2022-04-06 18:50:41,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604368804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:50:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532432416] [2022-04-06 18:50:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:50:41,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:50:41,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:50:41,810 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 18:50:41,811 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 18:50:41,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:50:41,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:50:42,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 18:50:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:50:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 18:50:42,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:50:42,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532432416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:50:42,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 13 [2022-04-06 18:50:42,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358057421] [2022-04-06 18:50:42,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358057421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:42,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:50:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396398264] [2022-04-06 18:50:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:42,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:50:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:50:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:42,140 INFO L87 Difference]: Start difference. First operand 849 states and 1021 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 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 18:50:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:42,330 INFO L93 Difference]: Finished difference Result 867 states and 1039 transitions. [2022-04-06 18:50:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:50:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-04-06 18:50:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:42,332 INFO L225 Difference]: With dead ends: 867 [2022-04-06 18:50:42,332 INFO L226 Difference]: Without dead ends: 788 [2022-04-06 18:50:42,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:42,333 INFO L913 BasicCegarLoop]: 299 mSDtfsCounter, 0 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:42,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1187 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:50:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-04-06 18:50:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-04-06 18:50:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.2419354838709677) internal successors, (770), 631 states have internal predecessors, (770), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-04-06 18:50:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 951 transitions. [2022-04-06 18:50:42,505 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 951 transitions. Word has length 77 [2022-04-06 18:50:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:42,505 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 951 transitions. [2022-04-06 18:50:42,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 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 18:50:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 951 transitions. [2022-04-06 18:50:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 18:50:42,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:42,507 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, 1, 1, 1] [2022-04-06 18:50:42,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 18:50:42,707 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,SelfDestructingSolverStorable67 [2022-04-06 18:50:42,707 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-04-06 18:50:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132499753] [2022-04-06 18:50:42,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 2 times [2022-04-06 18:50:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:42,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660913186] [2022-04-06 18:50:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:42,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:50:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 18:50:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660913186] [2022-04-06 18:50:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660913186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:42,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:42,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132499753] [2022-04-06 18:50:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132499753] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797610345] [2022-04-06 18:50:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:42,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:42,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:42,955 INFO L87 Difference]: Start difference. First operand 788 states and 951 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 18:50:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:43,712 INFO L93 Difference]: Finished difference Result 1066 states and 1306 transitions. [2022-04-06 18:50:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 81 [2022-04-06 18:50:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:43,714 INFO L225 Difference]: With dead ends: 1066 [2022-04-06 18:50:43,714 INFO L226 Difference]: Without dead ends: 788 [2022-04-06 18:50:43,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:50:43,727 INFO L913 BasicCegarLoop]: 260 mSDtfsCounter, 756 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:43,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 659 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-04-06 18:50:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-04-06 18:50:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.238709677419355) internal successors, (768), 631 states have internal predecessors, (768), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-04-06 18:50:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 949 transitions. [2022-04-06 18:50:43,911 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 949 transitions. Word has length 81 [2022-04-06 18:50:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:43,911 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 949 transitions. [2022-04-06 18:50:43,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 18:50:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 949 transitions. [2022-04-06 18:50:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 18:50:43,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:43,912 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:43,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-04-06 18:50:43,912 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-04-06 18:50:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:43,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1302616542] [2022-04-06 18:50:43,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 2 times [2022-04-06 18:50:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:43,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417807119] [2022-04-06 18:50:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:44,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:44,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417807119] [2022-04-06 18:50:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417807119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:44,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:44,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:44,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1302616542] [2022-04-06 18:50:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1302616542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:44,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:44,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:44,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844952536] [2022-04-06 18:50:44,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:44,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:50:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:50:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:44,142 INFO L87 Difference]: Start difference. First operand 788 states and 949 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 18:50:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:45,805 INFO L93 Difference]: Finished difference Result 833 states and 994 transitions. [2022-04-06 18:50:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 18:50:45,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2022-04-06 18:50:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:45,806 INFO L225 Difference]: With dead ends: 833 [2022-04-06 18:50:45,806 INFO L226 Difference]: Without dead ends: 700 [2022-04-06 18:50:45,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 18:50:45,807 INFO L913 BasicCegarLoop]: 425 mSDtfsCounter, 1203 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:45,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1571 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:50:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-04-06 18:50:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 359. [2022-04-06 18:50:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 282 states have (on average 1.2375886524822695) internal successors, (349), 286 states have internal predecessors, (349), 39 states have call successors, (39), 35 states have call predecessors, (39), 37 states have return successors, (43), 39 states have call predecessors, (43), 35 states have call successors, (43) [2022-04-06 18:50:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2022-04-06 18:50:45,905 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 78 [2022-04-06 18:50:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:45,906 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2022-04-06 18:50:45,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 18:50:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2022-04-06 18:50:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 18:50:45,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:45,906 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, 1] [2022-04-06 18:50:45,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-04-06 18:50:45,907 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-04-06 18:50:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014221554] [2022-04-06 18:50:45,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 2 times [2022-04-06 18:50:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234583482] [2022-04-06 18:50:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:45,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:50:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234583482] [2022-04-06 18:50:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234583482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:46,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:46,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:50:46,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014221554] [2022-04-06 18:50:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014221554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:46,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:46,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:50:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924092945] [2022-04-06 18:50:46,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:46,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:50:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:50:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:50:46,124 INFO L87 Difference]: Start difference. First operand 359 states and 431 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 18:50:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:46,914 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2022-04-06 18:50:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) Word has length 79 [2022-04-06 18:50:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:46,915 INFO L225 Difference]: With dead ends: 361 [2022-04-06 18:50:46,915 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 18:50:46,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:50:46,915 INFO L913 BasicCegarLoop]: 219 mSDtfsCounter, 285 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:46,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1561 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 18:50:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-04-06 18:50:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 219 states have (on average 1.2557077625570776) internal successors, (275), 221 states have internal predecessors, (275), 31 states have call successors, (31), 29 states have call predecessors, (31), 31 states have return successors, (36), 32 states have call predecessors, (36), 28 states have call successors, (36) [2022-04-06 18:50:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 342 transitions. [2022-04-06 18:50:46,996 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 342 transitions. Word has length 79 [2022-04-06 18:50:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:46,996 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 342 transitions. [2022-04-06 18:50:46,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 18:50:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 342 transitions. [2022-04-06 18:50:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 18:50:46,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:46,997 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:50:46,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-04-06 18:50:46,997 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-04-06 18:50:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354252617] [2022-04-06 18:50:46,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 2 times [2022-04-06 18:50:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473700662] [2022-04-06 18:50:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 18:50:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:47,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473700662] [2022-04-06 18:50:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473700662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:47,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354252617] [2022-04-06 18:50:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354252617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:47,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797635746] [2022-04-06 18:50:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:47,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:47,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:47,135 INFO L87 Difference]: Start difference. First operand 282 states and 342 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 18:50:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:47,646 INFO L93 Difference]: Finished difference Result 365 states and 428 transitions. [2022-04-06 18:50:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:50:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-04-06 18:50:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:47,647 INFO L225 Difference]: With dead ends: 365 [2022-04-06 18:50:47,647 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 18:50:47,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:47,647 INFO L913 BasicCegarLoop]: 205 mSDtfsCounter, 215 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:47,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 736 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:50:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 18:50:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 235. [2022-04-06 18:50:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 183 states have internal predecessors, (211), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-04-06 18:50:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 267 transitions. [2022-04-06 18:50:47,705 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 267 transitions. Word has length 83 [2022-04-06 18:50:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:47,705 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 267 transitions. [2022-04-06 18:50:47,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 18:50:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 267 transitions. [2022-04-06 18:50:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 18:50:47,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:47,706 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:50:47,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-04-06 18:50:47,706 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-04-06 18:50:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [505487799] [2022-04-06 18:50:47,707 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 2 times [2022-04-06 18:50:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71301791] [2022-04-06 18:50:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:47,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 18:50:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,960 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 18:50:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71301791] [2022-04-06 18:50:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71301791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:47,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [505487799] [2022-04-06 18:50:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [505487799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596107265] [2022-04-06 18:50:47,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:47,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:50:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:50:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:47,962 INFO L87 Difference]: Start difference. First operand 235 states and 267 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 18:50:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:48,546 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-04-06 18:50:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2022-04-06 18:50:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:48,547 INFO L225 Difference]: With dead ends: 287 [2022-04-06 18:50:48,547 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 18:50:48,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:50:48,548 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 435 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:48,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 999 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 18:50:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2022-04-06 18:50:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 182 states have internal predecessors, (207), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-04-06 18:50:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-04-06 18:50:48,615 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 99 [2022-04-06 18:50:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:48,615 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-04-06 18:50:48,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 18:50:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-04-06 18:50:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 18:50:48,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:48,616 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, 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 18:50:48,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-04-06 18:50:48,616 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-04-06 18:50:48,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:48,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853583054] [2022-04-06 18:50:48,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 2 times [2022-04-06 18:50:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:48,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848156059] [2022-04-06 18:50:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:48,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 18:50:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,852 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 18:50:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848156059] [2022-04-06 18:50:48,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848156059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:48,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:48,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:48,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:48,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853583054] [2022-04-06 18:50:48,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853583054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:48,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:48,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724338428] [2022-04-06 18:50:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:48,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:50:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:50:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:48,854 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 18:50:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:50,160 INFO L93 Difference]: Finished difference Result 508 states and 570 transitions. [2022-04-06 18:50:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 18:50:50,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 101 [2022-04-06 18:50:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:50,162 INFO L225 Difference]: With dead ends: 508 [2022-04-06 18:50:50,162 INFO L226 Difference]: Without dead ends: 399 [2022-04-06 18:50:50,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 18:50:50,163 INFO L913 BasicCegarLoop]: 252 mSDtfsCounter, 929 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:50,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 976 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-04-06 18:50:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 349. [2022-04-06 18:50:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 269 states have (on average 1.1486988847583643) internal successors, (309), 274 states have internal predecessors, (309), 40 states have call successors, (40), 38 states have call predecessors, (40), 39 states have return successors, (41), 37 states have call predecessors, (41), 38 states have call successors, (41) [2022-04-06 18:50:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2022-04-06 18:50:50,253 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 101 [2022-04-06 18:50:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:50,253 INFO L478 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2022-04-06 18:50:50,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 18:50:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2022-04-06 18:50:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 18:50:50,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:50,254 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, 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 18:50:50,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-04-06 18:50:50,254 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-04-06 18:50:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:50,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685821432] [2022-04-06 18:50:50,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 2 times [2022-04-06 18:50:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:50,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980388489] [2022-04-06 18:50:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 18:50:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,478 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 18:50:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980388489] [2022-04-06 18:50:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980388489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:50,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:50,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:50:50,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685821432] [2022-04-06 18:50:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685821432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:50,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:50,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:50:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418483971] [2022-04-06 18:50:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:50,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 18:50:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 18:50:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:50:50,479 INFO L87 Difference]: Start difference. First operand 349 states and 390 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-06 18:50:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:50,970 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2022-04-06 18:50:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-04-06 18:50:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:50,971 INFO L225 Difference]: With dead ends: 367 [2022-04-06 18:50:50,971 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 18:50:50,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:50,972 INFO L913 BasicCegarLoop]: 160 mSDtfsCounter, 105 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:50,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 946 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 18:50:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 146. [2022-04-06 18:50:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-04-06 18:50:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-04-06 18:50:51,013 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 101 [2022-04-06 18:50:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:51,013 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-04-06 18:50:51,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-06 18:50:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-04-06 18:50:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 18:50:51,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:51,014 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:51,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-04-06 18:50:51,014 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 1 times [2022-04-06 18:50:51,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1328854678] [2022-04-06 18:50:51,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 2 times [2022-04-06 18:50:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:51,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197045779] [2022-04-06 18:50:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:50:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 18:50:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:50:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197045779] [2022-04-06 18:50:51,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197045779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:51,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:51,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1328854678] [2022-04-06 18:50:51,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1328854678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797730002] [2022-04-06 18:50:51,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:51,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:51,175 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 18:50:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:51,431 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-04-06 18:50:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:50:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-04-06 18:50:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:51,432 INFO L225 Difference]: With dead ends: 192 [2022-04-06 18:50:51,432 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 18:50:51,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:51,433 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 117 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:51,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 360 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:50:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 18:50:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-04-06 18:50:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 119 states have internal predecessors, (131), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-06 18:50:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-04-06 18:50:51,476 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 116 [2022-04-06 18:50:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:51,476 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-04-06 18:50:51,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-06 18:50:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-04-06 18:50:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 18:50:51,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:51,477 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:51,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-04-06 18:50:51,477 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-04-06 18:50:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122915483] [2022-04-06 18:50:51,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 2 times [2022-04-06 18:50:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194208423] [2022-04-06 18:50:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:50:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 18:50:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:50:51,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194208423] [2022-04-06 18:50:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194208423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:51,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:51,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122915483] [2022-04-06 18:50:51,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122915483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:50:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367353219] [2022-04-06 18:50:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:51,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:50:51,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:50:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:51,702 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 18:50:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:52,421 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-04-06 18:50:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 18:50:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-04-06 18:50:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:52,422 INFO L225 Difference]: With dead ends: 292 [2022-04-06 18:50:52,422 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 18:50:52,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 18:50:52,423 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 436 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:52,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 388 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 18:50:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 18:50:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 119 states have internal predecessors, (130), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-06 18:50:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-04-06 18:50:52,465 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-04-06 18:50:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:52,465 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-04-06 18:50:52,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 18:50:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-04-06 18:50:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 18:50:52,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:52,466 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:50:52,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-04-06 18:50:52,466 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-04-06 18:50:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:52,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614685003] [2022-04-06 18:50:52,467 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 2 times [2022-04-06 18:50:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:52,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622042874] [2022-04-06 18:50:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:52,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:50:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 18:50:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 18:50:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 18:50:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:50:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:52,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622042874] [2022-04-06 18:50:52,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622042874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:52,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:52,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:50:52,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:52,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614685003] [2022-04-06 18:50:52,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614685003] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:52,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:52,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:50:52,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943971541] [2022-04-06 18:50:52,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:52,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:50:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:52,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:50:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:50:52,720 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 18:50:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:53,276 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-04-06 18:50:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-04-06 18:50:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:53,277 INFO L225 Difference]: With dead ends: 152 [2022-04-06 18:50:53,277 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:50:53,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-04-06 18:50:53,278 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 240 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:53,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 340 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:50:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:50:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 18:50:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:50:53,279 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-04-06 18:50:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:53,279 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:50:53,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 18:50:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:50:53,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:50:53,281 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:50:53,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-04-06 18:50:53,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.