/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:22:06,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:22:06,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:22:06,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 05:22:06,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 05:22:06,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 05:22:06,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 05:22:06,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 05:22:06,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 05:22:06,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 05:22:06,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 05:22:06,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 05:22:06,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 05:22:06,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 05:22:06,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 05:22:06,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 05:22:06,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 05:22:06,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 05:22:06,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 05:22:06,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 05:22:06,802 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 05:22:06,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 05:22:06,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 05:22:06,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 05:22:06,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 05:22:06,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 05:22:06,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:22:06,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:22:06,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:22:06,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:22:06,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:22:06,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:22:06,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:22:06,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:22:06,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:22:06,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:22:06,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:22:06,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:22:06,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:22:06,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:22:06,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:22:06,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:22:06,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:22:06,853 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:22:06,853 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:22:06,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:22:06,853 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:22:06,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:22:07,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:22:07,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:22:07,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:22:07,125 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:22:07,125 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:22:07,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-03-18 05:22:07,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb235413/1bea762378e0493ca668b4b6c31ebe9f/FLAG491c2e2e2 [2022-03-18 05:22:07,614 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:22:07,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-03-18 05:22:07,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb235413/1bea762378e0493ca668b4b6c31ebe9f/FLAG491c2e2e2 [2022-03-18 05:22:07,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb235413/1bea762378e0493ca668b4b6c31ebe9f [2022-03-18 05:22:07,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:22:07,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:22:07,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:22:07,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:22:07,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:22:07,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:22:07" (1/1) ... [2022-03-18 05:22:07,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490e8bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:07, skipping insertion in model container [2022-03-18 05:22:07,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:22:07" (1/1) ... [2022-03-18 05:22:07,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:22:07,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:22:07,919 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] [2022-03-18 05:22:08,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:22:08,151 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:22:08,173 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] [2022-03-18 05:22:08,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:22:08,247 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:22:08,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08 WrapperNode [2022-03-18 05:22:08,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:22:08,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:22:08,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:22:08,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:22:08,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:22:08,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:22:08,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:22:08,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:22:08,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (1/1) ... [2022-03-18 05:22:08,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:22:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:22:08,410 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) [2022-03-18 05:22:08,411 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 [2022-03-18 05:22:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:22:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:22:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:22:08,438 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-03-18 05:22:08,439 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-03-18 05:22:08,440 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-03-18 05:22:08,440 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-03-18 05:22:08,444 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-03-18 05:22:08,445 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-03-18 05:22:08,446 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-18 05:22:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-18 05:22:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-18 05:22:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-18 05:22:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-03-18 05:22:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-18 05:22:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-03-18 05:22:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-18 05:22:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-18 05:22:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:22:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:22:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:22:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:22:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:22:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:22:08,745 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:22:08,747 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:22:08,936 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,011 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-03-18 05:22:09,011 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-03-18 05:22:09,019 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,059 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-03-18 05:22:09,059 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-03-18 05:22:09,080 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,094 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-18 05:22:09,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-18 05:22:09,159 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,199 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-03-18 05:22:09,199 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-03-18 05:22:09,199 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-03-18 05:22:09,203 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,336 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-03-18 05:22:09,336 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-03-18 05:22:09,338 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,359 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-18 05:22:09,359 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-18 05:22:09,382 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,397 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-03-18 05:22:09,398 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-03-18 05:22:09,401 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,537 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-03-18 05:22:09,537 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-03-18 05:22:09,545 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:22:09,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:22:09,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:22:09,571 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:22:09,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:22:09,586 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:22:09,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:22:09 BoogieIcfgContainer [2022-03-18 05:22:09,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:22:09,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:22:09,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:22:09,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:22:09,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:22:07" (1/3) ... [2022-03-18 05:22:09,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e05388c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:22:09, skipping insertion in model container [2022-03-18 05:22:09,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:22:08" (2/3) ... [2022-03-18 05:22:09,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e05388c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:22:09, skipping insertion in model container [2022-03-18 05:22:09,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:22:09" (3/3) ... [2022-03-18 05:22:09,598 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-03-18 05:22:09,602 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:22:09,602 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:22:09,636 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:22:09,641 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 [2022-03-18 05:22:09,641 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:22:09,661 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) [2022-03-18 05:22:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 05:22:09,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:09,668 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:09,669 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-03-18 05:22:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:09,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2020722939] [2022-03-18 05:22:09,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:09,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 2 times [2022-03-18 05:22:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27459187] [2022-03-18 05:22:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:10,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:10,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27459187] [2022-03-18 05:22:10,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27459187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:10,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:10,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:22:10,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:10,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2020722939] [2022-03-18 05:22:10,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2020722939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:10,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:10,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:22:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484238040] [2022-03-18 05:22:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:10,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:22:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:22:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:22:10,153 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) [2022-03-18 05:22:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:12,293 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-03-18 05:22:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:22:12,295 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 [2022-03-18 05:22:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:12,308 INFO L225 Difference]: With dead ends: 1043 [2022-03-18 05:22:12,308 INFO L226 Difference]: Without dead ends: 663 [2022-03-18 05:22:12,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:12,317 INFO L912 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:12,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:22:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-18 05:22:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-03-18 05:22:12,420 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) [2022-03-18 05:22:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-03-18 05:22:12,426 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-03-18 05:22:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:12,426 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-03-18 05:22:12,426 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) [2022-03-18 05:22:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-03-18 05:22:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 05:22:12,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:12,427 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:12,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:22:12,428 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-03-18 05:22:12,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453627862] [2022-03-18 05:22:12,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 2 times [2022-03-18 05:22:12,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:12,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590714682] [2022-03-18 05:22:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:12,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590714682] [2022-03-18 05:22:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590714682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:12,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:12,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453627862] [2022-03-18 05:22:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453627862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:12,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109198285] [2022-03-18 05:22:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:12,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:22:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:22:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:12,634 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) [2022-03-18 05:22:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:14,643 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-03-18 05:22:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:22:14,643 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 [2022-03-18 05:22:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:14,650 INFO L225 Difference]: With dead ends: 961 [2022-03-18 05:22:14,650 INFO L226 Difference]: Without dead ends: 842 [2022-03-18 05:22:14,651 INFO L911 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 [2022-03-18 05:22:14,652 INFO L912 BasicCegarLoop]: 843 mSDtfsCounter, 1480 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:14,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1035 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:22:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-18 05:22:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-03-18 05:22:14,727 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) [2022-03-18 05:22:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-03-18 05:22:14,731 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-03-18 05:22:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:14,731 INFO L478 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-03-18 05:22:14,731 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) [2022-03-18 05:22:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-03-18 05:22:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 05:22:14,733 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:14,733 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:14,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:22:14,733 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-03-18 05:22:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:14,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118522845] [2022-03-18 05:22:14,735 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 2 times [2022-03-18 05:22:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623703274] [2022-03-18 05:22:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:14,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:14,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:14,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623703274] [2022-03-18 05:22:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623703274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:14,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:14,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118522845] [2022-03-18 05:22:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118522845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:14,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739880090] [2022-03-18 05:22:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:14,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:22:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:22:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:14,909 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) [2022-03-18 05:22:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:16,565 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-03-18 05:22:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:22:16,566 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 [2022-03-18 05:22:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:16,572 INFO L225 Difference]: With dead ends: 1142 [2022-03-18 05:22:16,572 INFO L226 Difference]: Without dead ends: 966 [2022-03-18 05:22:16,573 INFO L911 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 [2022-03-18 05:22:16,574 INFO L912 BasicCegarLoop]: 722 mSDtfsCounter, 1133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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 [2022-03-18 05:22:16,574 INFO L913 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] [2022-03-18 05:22:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-03-18 05:22:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-03-18 05:22:16,661 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) [2022-03-18 05:22:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-03-18 05:22:16,665 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-03-18 05:22:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:16,665 INFO L478 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-03-18 05:22:16,665 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) [2022-03-18 05:22:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-03-18 05:22:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 05:22:16,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:16,667 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:16,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 05:22:16,668 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-03-18 05:22:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [248552378] [2022-03-18 05:22:16,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 2 times [2022-03-18 05:22:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:16,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494488492] [2022-03-18 05:22:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:16,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494488492] [2022-03-18 05:22:16,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494488492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:16,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:16,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:16,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [248552378] [2022-03-18 05:22:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [248552378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:16,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:16,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:16,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093214850] [2022-03-18 05:22:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:16,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:22:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:22:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:16,785 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) [2022-03-18 05:22:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:19,272 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-03-18 05:22:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:22:19,274 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 [2022-03-18 05:22:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:19,281 INFO L225 Difference]: With dead ends: 1624 [2022-03-18 05:22:19,282 INFO L226 Difference]: Without dead ends: 1340 [2022-03-18 05:22:19,283 INFO L911 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 [2022-03-18 05:22:19,284 INFO L912 BasicCegarLoop]: 1003 mSDtfsCounter, 746 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:19,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1256 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 05:22:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-03-18 05:22:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-03-18 05:22:19,417 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) [2022-03-18 05:22:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-03-18 05:22:19,421 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-03-18 05:22:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:19,422 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-03-18 05:22:19,422 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) [2022-03-18 05:22:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-03-18 05:22:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 05:22:19,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:19,429 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:19,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 05:22:19,429 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:19,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-03-18 05:22:19,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:19,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1971373291] [2022-03-18 05:22:19,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 2 times [2022-03-18 05:22:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:19,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153575683] [2022-03-18 05:22:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:19,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:19,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:19,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153575683] [2022-03-18 05:22:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153575683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:19,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:19,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:19,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1971373291] [2022-03-18 05:22:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1971373291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:19,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:19,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624510149] [2022-03-18 05:22:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:19,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:22:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:22:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:22:19,669 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) [2022-03-18 05:22:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:21,648 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-03-18 05:22:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:22:21,655 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 [2022-03-18 05:22:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:21,661 INFO L225 Difference]: With dead ends: 1626 [2022-03-18 05:22:21,661 INFO L226 Difference]: Without dead ends: 1042 [2022-03-18 05:22:21,663 INFO L911 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 [2022-03-18 05:22:21,664 INFO L912 BasicCegarLoop]: 736 mSDtfsCounter, 2487 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2493 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:21,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2493 Valid, 995 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 05:22:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-03-18 05:22:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-03-18 05:22:21,784 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) [2022-03-18 05:22:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-03-18 05:22:21,790 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-03-18 05:22:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:21,792 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-03-18 05:22:21,792 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) [2022-03-18 05:22:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-03-18 05:22:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 05:22:21,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:21,795 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:21,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 05:22:21,795 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-03-18 05:22:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:21,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [544618265] [2022-03-18 05:22:21,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 2 times [2022-03-18 05:22:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:21,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294852084] [2022-03-18 05:22:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294852084] [2022-03-18 05:22:21,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294852084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:21,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:21,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:21,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [544618265] [2022-03-18 05:22:21,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [544618265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:21,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:21,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354381931] [2022-03-18 05:22:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:21,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:22:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:22:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:21,926 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) [2022-03-18 05:22:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:23,460 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-03-18 05:22:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:22:23,461 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 [2022-03-18 05:22:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:23,466 INFO L225 Difference]: With dead ends: 963 [2022-03-18 05:22:23,466 INFO L226 Difference]: Without dead ends: 959 [2022-03-18 05:22:23,467 INFO L911 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 [2022-03-18 05:22:23,467 INFO L912 BasicCegarLoop]: 710 mSDtfsCounter, 1150 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:23,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 952 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 05:22:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-18 05:22:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-03-18 05:22:23,591 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) [2022-03-18 05:22:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-03-18 05:22:23,595 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-03-18 05:22:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:23,596 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-03-18 05:22:23,596 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) [2022-03-18 05:22:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-03-18 05:22:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 05:22:23,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:23,598 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:23,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 05:22:23,598 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-03-18 05:22:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448550473] [2022-03-18 05:22:23,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 2 times [2022-03-18 05:22:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884627450] [2022-03-18 05:22:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:23,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:23,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:23,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:23,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884627450] [2022-03-18 05:22:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884627450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:23,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:23,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448550473] [2022-03-18 05:22:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448550473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:23,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583042439] [2022-03-18 05:22:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:23,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 05:22:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 05:22:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 05:22:23,786 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) [2022-03-18 05:22:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:25,747 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-03-18 05:22:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:22:25,755 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 [2022-03-18 05:22:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:25,760 INFO L225 Difference]: With dead ends: 1409 [2022-03-18 05:22:25,760 INFO L226 Difference]: Without dead ends: 993 [2022-03-18 05:22:25,762 INFO L911 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 [2022-03-18 05:22:25,762 INFO L912 BasicCegarLoop]: 812 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:25,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1232 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 05:22:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-03-18 05:22:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-03-18 05:22:25,885 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) [2022-03-18 05:22:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-03-18 05:22:25,892 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-03-18 05:22:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:25,892 INFO L478 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-03-18 05:22:25,892 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) [2022-03-18 05:22:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-03-18 05:22:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 05:22:25,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:25,895 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:25,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 05:22:25,895 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-03-18 05:22:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:25,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096410380] [2022-03-18 05:22:25,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 2 times [2022-03-18 05:22:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414016914] [2022-03-18 05:22:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:25,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:26,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414016914] [2022-03-18 05:22:26,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414016914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:26,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:26,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:26,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096410380] [2022-03-18 05:22:26,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096410380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:26,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:26,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:22:26,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754657031] [2022-03-18 05:22:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:26,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:22:26,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:22:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:22:26,051 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) [2022-03-18 05:22:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:27,455 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-03-18 05:22:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:22:27,456 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 [2022-03-18 05:22:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:27,460 INFO L225 Difference]: With dead ends: 975 [2022-03-18 05:22:27,460 INFO L226 Difference]: Without dead ends: 957 [2022-03-18 05:22:27,461 INFO L911 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 [2022-03-18 05:22:27,461 INFO L912 BasicCegarLoop]: 669 mSDtfsCounter, 1139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:27,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 749 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 05:22:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-18 05:22:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-03-18 05:22:27,589 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) [2022-03-18 05:22:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-03-18 05:22:27,592 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-03-18 05:22:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:27,592 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-03-18 05:22:27,593 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) [2022-03-18 05:22:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-03-18 05:22:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 05:22:27,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:27,595 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:27,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 05:22:27,595 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-03-18 05:22:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1063992757] [2022-03-18 05:22:27,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 2 times [2022-03-18 05:22:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:27,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836862138] [2022-03-18 05:22:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:27,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 05:22:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836862138] [2022-03-18 05:22:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836862138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:27,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1063992757] [2022-03-18 05:22:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1063992757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125324633] [2022-03-18 05:22:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:27,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 05:22:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 05:22:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 05:22:27,766 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) [2022-03-18 05:22:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:29,368 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-03-18 05:22:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:22:29,369 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 [2022-03-18 05:22:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:29,372 INFO L225 Difference]: With dead ends: 1159 [2022-03-18 05:22:29,372 INFO L226 Difference]: Without dead ends: 934 [2022-03-18 05:22:29,373 INFO L911 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 [2022-03-18 05:22:29,373 INFO L912 BasicCegarLoop]: 788 mSDtfsCounter, 921 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:29,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1341 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 05:22:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-18 05:22:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-03-18 05:22:29,502 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) [2022-03-18 05:22:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-03-18 05:22:29,505 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-03-18 05:22:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:29,505 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-03-18 05:22:29,505 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) [2022-03-18 05:22:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-03-18 05:22:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 05:22:29,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:29,508 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:29,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 05:22:29,508 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-03-18 05:22:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:29,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237760863] [2022-03-18 05:22:29,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 2 times [2022-03-18 05:22:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:29,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3385293] [2022-03-18 05:22:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:29,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 05:22:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3385293] [2022-03-18 05:22:29,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3385293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:29,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:29,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:29,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237760863] [2022-03-18 05:22:29,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237760863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:29,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:29,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314420374] [2022-03-18 05:22:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:29,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 05:22:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 05:22:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 05:22:29,641 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) [2022-03-18 05:22:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:30,590 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-03-18 05:22:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:22:30,590 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 [2022-03-18 05:22:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:30,594 INFO L225 Difference]: With dead ends: 956 [2022-03-18 05:22:30,594 INFO L226 Difference]: Without dead ends: 889 [2022-03-18 05:22:30,595 INFO L911 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 [2022-03-18 05:22:30,595 INFO L912 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 [2022-03-18 05:22:30,596 INFO L913 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] [2022-03-18 05:22:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-18 05:22:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-03-18 05:22:30,746 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) [2022-03-18 05:22:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-03-18 05:22:30,748 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-03-18 05:22:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:30,749 INFO L478 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-03-18 05:22:30,749 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) [2022-03-18 05:22:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-03-18 05:22:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 05:22:30,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:30,751 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:30,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 05:22:30,751 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-03-18 05:22:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919579883] [2022-03-18 05:22:30,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 2 times [2022-03-18 05:22:30,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:30,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286927979] [2022-03-18 05:22:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:30,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286927979] [2022-03-18 05:22:30,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286927979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:30,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:30,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:22:30,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:30,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919579883] [2022-03-18 05:22:30,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919579883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:30,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:30,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:22:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883696385] [2022-03-18 05:22:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:30,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:22:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:22:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:22:30,935 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) [2022-03-18 05:22:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:33,385 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-03-18 05:22:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:22:33,385 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 [2022-03-18 05:22:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:33,389 INFO L225 Difference]: With dead ends: 1059 [2022-03-18 05:22:33,389 INFO L226 Difference]: Without dead ends: 998 [2022-03-18 05:22:33,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-18 05:22:33,390 INFO L912 BasicCegarLoop]: 763 mSDtfsCounter, 1792 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:33,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2029 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 05:22:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-03-18 05:22:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-03-18 05:22:33,535 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) [2022-03-18 05:22:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-03-18 05:22:33,538 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-03-18 05:22:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:33,539 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-03-18 05:22:33,539 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) [2022-03-18 05:22:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-03-18 05:22:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:22:33,541 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:33,541 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:33,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 05:22:33,541 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-03-18 05:22:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550376768] [2022-03-18 05:22:33,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 2 times [2022-03-18 05:22:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793264983] [2022-03-18 05:22:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793264983] [2022-03-18 05:22:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793264983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:33,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [550376768] [2022-03-18 05:22:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [550376768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:22:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400313102] [2022-03-18 05:22:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:33,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 05:22:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 05:22:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 05:22:33,676 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) [2022-03-18 05:22:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:35,413 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-03-18 05:22:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:22:35,413 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 [2022-03-18 05:22:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:35,417 INFO L225 Difference]: With dead ends: 1094 [2022-03-18 05:22:35,417 INFO L226 Difference]: Without dead ends: 1083 [2022-03-18 05:22:35,417 INFO L911 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 [2022-03-18 05:22:35,418 INFO L912 BasicCegarLoop]: 806 mSDtfsCounter, 1242 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:35,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 1390 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 05:22:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-03-18 05:22:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-03-18 05:22:35,588 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) [2022-03-18 05:22:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-03-18 05:22:35,591 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-03-18 05:22:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:35,591 INFO L478 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-03-18 05:22:35,591 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) [2022-03-18 05:22:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-03-18 05:22:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:22:35,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:35,593 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:35,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 05:22:35,594 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:35,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-03-18 05:22:35,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560111482] [2022-03-18 05:22:35,595 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 2 times [2022-03-18 05:22:35,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:35,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105719255] [2022-03-18 05:22:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:35,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:35,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105719255] [2022-03-18 05:22:35,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105719255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:35,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:35,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560111482] [2022-03-18 05:22:35,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560111482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:35,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559441315] [2022-03-18 05:22:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:35,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:22:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:22:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:22:35,783 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) [2022-03-18 05:22:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:38,096 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-03-18 05:22:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:22:38,097 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 [2022-03-18 05:22:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:38,100 INFO L225 Difference]: With dead ends: 1020 [2022-03-18 05:22:38,100 INFO L226 Difference]: Without dead ends: 957 [2022-03-18 05:22:38,101 INFO L911 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 [2022-03-18 05:22:38,101 INFO L912 BasicCegarLoop]: 649 mSDtfsCounter, 2232 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:38,102 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 1785 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:22:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-18 05:22:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-03-18 05:22:38,250 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) [2022-03-18 05:22:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-03-18 05:22:38,253 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-03-18 05:22:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:38,253 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-03-18 05:22:38,253 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) [2022-03-18 05:22:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-03-18 05:22:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:22:38,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:38,255 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:38,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 05:22:38,256 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-03-18 05:22:38,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198489529] [2022-03-18 05:22:38,256 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 2 times [2022-03-18 05:22:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008040420] [2022-03-18 05:22:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:38,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:22:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008040420] [2022-03-18 05:22:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008040420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:38,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:38,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198489529] [2022-03-18 05:22:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198489529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:38,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287952009] [2022-03-18 05:22:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:38,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:22:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:22:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:22:38,419 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) [2022-03-18 05:22:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:40,195 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-03-18 05:22:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:22:40,196 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 [2022-03-18 05:22:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:40,198 INFO L225 Difference]: With dead ends: 982 [2022-03-18 05:22:40,198 INFO L226 Difference]: Without dead ends: 977 [2022-03-18 05:22:40,199 INFO L911 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 [2022-03-18 05:22:40,199 INFO L912 BasicCegarLoop]: 691 mSDtfsCounter, 1534 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:40,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1435 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 05:22:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-03-18 05:22:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-03-18 05:22:40,344 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) [2022-03-18 05:22:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-03-18 05:22:40,346 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-03-18 05:22:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:40,347 INFO L478 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-03-18 05:22:40,347 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) [2022-03-18 05:22:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-03-18 05:22:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 05:22:40,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:40,349 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:40,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 05:22:40,349 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-03-18 05:22:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273106042] [2022-03-18 05:22:40,350 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 2 times [2022-03-18 05:22:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316650336] [2022-03-18 05:22:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:40,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:22:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 05:22:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:40,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:40,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316650336] [2022-03-18 05:22:40,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316650336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:40,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:40,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:22:40,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273106042] [2022-03-18 05:22:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273106042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:40,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:40,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:22:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83225806] [2022-03-18 05:22:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:40,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:22:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:22:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:22:40,476 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) [2022-03-18 05:22:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:42,288 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-03-18 05:22:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:22:42,289 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 [2022-03-18 05:22:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:42,292 INFO L225 Difference]: With dead ends: 1188 [2022-03-18 05:22:42,292 INFO L226 Difference]: Without dead ends: 947 [2022-03-18 05:22:42,293 INFO L911 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 [2022-03-18 05:22:42,293 INFO L912 BasicCegarLoop]: 638 mSDtfsCounter, 1034 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:42,293 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1163 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 05:22:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-18 05:22:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-03-18 05:22:42,449 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) [2022-03-18 05:22:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-03-18 05:22:42,450 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-03-18 05:22:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:42,451 INFO L478 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-03-18 05:22:42,451 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) [2022-03-18 05:22:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-03-18 05:22:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 05:22:42,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:42,453 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:42,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 05:22:42,454 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-03-18 05:22:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:42,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778123569] [2022-03-18 05:22:42,455 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 2 times [2022-03-18 05:22:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:42,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728901528] [2022-03-18 05:22:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728901528] [2022-03-18 05:22:42,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728901528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:42,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:42,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:42,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778123569] [2022-03-18 05:22:42,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778123569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:42,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:42,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751227490] [2022-03-18 05:22:42,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:42,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:22:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:22:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:22:42,626 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) [2022-03-18 05:22:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:45,344 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-03-18 05:22:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:22:45,344 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 [2022-03-18 05:22:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:45,347 INFO L225 Difference]: With dead ends: 962 [2022-03-18 05:22:45,347 INFO L226 Difference]: Without dead ends: 958 [2022-03-18 05:22:45,347 INFO L911 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 [2022-03-18 05:22:45,348 INFO L912 BasicCegarLoop]: 703 mSDtfsCounter, 371 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:45,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2378 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 05:22:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-18 05:22:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-03-18 05:22:45,497 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) [2022-03-18 05:22:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-03-18 05:22:45,498 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-03-18 05:22:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:45,499 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-03-18 05:22:45,499 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) [2022-03-18 05:22:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-03-18 05:22:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 05:22:45,501 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:45,501 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:45,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 05:22:45,501 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-03-18 05:22:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244591243] [2022-03-18 05:22:45,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 2 times [2022-03-18 05:22:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515092735] [2022-03-18 05:22:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515092735] [2022-03-18 05:22:45,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515092735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:45,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:45,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:45,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244591243] [2022-03-18 05:22:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244591243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:45,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:45,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:22:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194663153] [2022-03-18 05:22:45,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:45,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:22:45,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:22:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:22:45,688 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) [2022-03-18 05:22:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:48,015 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-03-18 05:22:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:22:48,015 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 [2022-03-18 05:22:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:48,019 INFO L225 Difference]: With dead ends: 977 [2022-03-18 05:22:48,019 INFO L226 Difference]: Without dead ends: 953 [2022-03-18 05:22:48,020 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:22:48,020 INFO L912 BasicCegarLoop]: 705 mSDtfsCounter, 737 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3839 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 3839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:48,020 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2436 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 3839 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 05:22:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-18 05:22:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-03-18 05:22:48,187 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) [2022-03-18 05:22:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-03-18 05:22:48,190 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-03-18 05:22:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:48,190 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-03-18 05:22:48,190 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) [2022-03-18 05:22:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-03-18 05:22:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 05:22:48,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:48,192 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:48,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 05:22:48,192 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-03-18 05:22:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:48,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773542419] [2022-03-18 05:22:48,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 2 times [2022-03-18 05:22:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:48,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708819148] [2022-03-18 05:22:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:48,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:22:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:48,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708819148] [2022-03-18 05:22:48,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708819148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:48,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:48,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:22:48,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:48,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773542419] [2022-03-18 05:22:48,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773542419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:48,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:48,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:22:48,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039396218] [2022-03-18 05:22:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:48,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:22:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:22:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:22:48,455 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) [2022-03-18 05:22:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:50,990 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-03-18 05:22:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:22:50,991 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 [2022-03-18 05:22:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:50,993 INFO L225 Difference]: With dead ends: 963 [2022-03-18 05:22:50,994 INFO L226 Difference]: Without dead ends: 957 [2022-03-18 05:22:50,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:22:50,995 INFO L912 BasicCegarLoop]: 653 mSDtfsCounter, 1931 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:50,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1957 Valid, 1476 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 05:22:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-18 05:22:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-03-18 05:22:51,181 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) [2022-03-18 05:22:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-03-18 05:22:51,182 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-03-18 05:22:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:51,183 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-03-18 05:22:51,183 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) [2022-03-18 05:22:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-03-18 05:22:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:22:51,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:51,185 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:51,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 05:22:51,185 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-03-18 05:22:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:51,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030199964] [2022-03-18 05:22:51,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 2 times [2022-03-18 05:22:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:51,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386102249] [2022-03-18 05:22:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:22:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:51,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386102249] [2022-03-18 05:22:51,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386102249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:51,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:51,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:51,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030199964] [2022-03-18 05:22:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030199964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:51,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:22:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376070442] [2022-03-18 05:22:51,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:51,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:22:51,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:22:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:22:51,346 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) [2022-03-18 05:22:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:53,222 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-03-18 05:22:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:22:53,223 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 [2022-03-18 05:22:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:53,227 INFO L225 Difference]: With dead ends: 967 [2022-03-18 05:22:53,227 INFO L226 Difference]: Without dead ends: 931 [2022-03-18 05:22:53,227 INFO L911 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 [2022-03-18 05:22:53,228 INFO L912 BasicCegarLoop]: 656 mSDtfsCounter, 2284 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:53,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1257 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 05:22:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-03-18 05:22:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-03-18 05:22:53,450 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) [2022-03-18 05:22:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-03-18 05:22:53,452 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-03-18 05:22:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:53,452 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-03-18 05:22:53,452 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) [2022-03-18 05:22:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-03-18 05:22:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 05:22:53,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:53,454 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:53,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 05:22:53,454 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:53,454 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-03-18 05:22:53,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:53,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403423782] [2022-03-18 05:22:53,455 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 2 times [2022-03-18 05:22:53,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:53,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579118369] [2022-03-18 05:22:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:53,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:22:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:53,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:53,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579118369] [2022-03-18 05:22:53,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579118369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:53,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:53,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:22:53,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:53,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403423782] [2022-03-18 05:22:53,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403423782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:53,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:53,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:22:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700379027] [2022-03-18 05:22:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:53,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:22:53,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:22:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:22:53,701 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) [2022-03-18 05:22:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:55,913 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-03-18 05:22:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:22:55,914 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 [2022-03-18 05:22:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:55,919 INFO L225 Difference]: With dead ends: 933 [2022-03-18 05:22:55,920 INFO L226 Difference]: Without dead ends: 927 [2022-03-18 05:22:55,920 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:22:55,921 INFO L912 BasicCegarLoop]: 624 mSDtfsCounter, 2924 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:55,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 1295 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 05:22:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-18 05:22:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-03-18 05:22:56,109 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) [2022-03-18 05:22:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-03-18 05:22:56,111 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-03-18 05:22:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:56,111 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-03-18 05:22:56,111 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) [2022-03-18 05:22:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-03-18 05:22:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 05:22:56,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:56,113 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:56,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 05:22:56,113 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-03-18 05:22:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296031870] [2022-03-18 05:22:56,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 2 times [2022-03-18 05:22:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104059780] [2022-03-18 05:22:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:56,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:22:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104059780] [2022-03-18 05:22:56,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104059780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:56,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:56,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:22:56,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296031870] [2022-03-18 05:22:56,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296031870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:56,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:56,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:22:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029419440] [2022-03-18 05:22:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:56,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:22:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:22:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:22:56,326 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) [2022-03-18 05:22:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:58,873 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-03-18 05:22:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:22:58,874 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 [2022-03-18 05:22:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:58,877 INFO L225 Difference]: With dead ends: 956 [2022-03-18 05:22:58,878 INFO L226 Difference]: Without dead ends: 916 [2022-03-18 05:22:58,878 INFO L911 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 [2022-03-18 05:22:58,879 INFO L912 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 5125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:58,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2655 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 05:22:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-03-18 05:22:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-03-18 05:22:59,071 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) [2022-03-18 05:22:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-03-18 05:22:59,072 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-03-18 05:22:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:59,072 INFO L478 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-03-18 05:22:59,072 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) [2022-03-18 05:22:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-03-18 05:22:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 05:22:59,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:22:59,074 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:22:59,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 05:22:59,074 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:22:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:22:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-03-18 05:22:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:59,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [181319756] [2022-03-18 05:22:59,075 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:22:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 2 times [2022-03-18 05:22:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:22:59,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825730097] [2022-03-18 05:22:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:22:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:22:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:22:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:22:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:22:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:22:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:22:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:22:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:22:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:22:59,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:22:59,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825730097] [2022-03-18 05:22:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825730097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:59,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:22:59,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:22:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [181319756] [2022-03-18 05:22:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [181319756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:22:59,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:22:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:22:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948647801] [2022-03-18 05:22:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:22:59,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:22:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:22:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:22:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:22:59,361 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) [2022-03-18 05:23:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:02,076 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-03-18 05:23:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:23:02,078 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 [2022-03-18 05:23:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:02,081 INFO L225 Difference]: With dead ends: 932 [2022-03-18 05:23:02,081 INFO L226 Difference]: Without dead ends: 914 [2022-03-18 05:23:02,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:02,082 INFO L912 BasicCegarLoop]: 670 mSDtfsCounter, 991 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:02,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2775 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 05:23:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-03-18 05:23:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-03-18 05:23:02,334 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) [2022-03-18 05:23:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-03-18 05:23:02,336 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 56 [2022-03-18 05:23:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:02,336 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-03-18 05:23:02,337 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) [2022-03-18 05:23:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-03-18 05:23:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 05:23:02,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:02,339 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:02,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 05:23:02,339 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-03-18 05:23:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:02,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409892515] [2022-03-18 05:23:02,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 2 times [2022-03-18 05:23:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321210636] [2022-03-18 05:23:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:23:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:02,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321210636] [2022-03-18 05:23:02,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321210636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:02,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:02,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:23:02,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:02,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409892515] [2022-03-18 05:23:02,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409892515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:02,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:02,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:23:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617094044] [2022-03-18 05:23:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:02,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:23:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:23:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:23:02,571 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) [2022-03-18 05:23:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:05,077 INFO L93 Difference]: Finished difference Result 927 states and 1303 transitions. [2022-03-18 05:23:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:23:05,077 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 [2022-03-18 05:23:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:05,080 INFO L225 Difference]: With dead ends: 927 [2022-03-18 05:23:05,080 INFO L226 Difference]: Without dead ends: 909 [2022-03-18 05:23:05,080 INFO L911 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 [2022-03-18 05:23:05,081 INFO L912 BasicCegarLoop]: 654 mSDtfsCounter, 363 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:05,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2581 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 05:23:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-18 05:23:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-03-18 05:23:05,307 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) [2022-03-18 05:23:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1072 transitions. [2022-03-18 05:23:05,309 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1072 transitions. Word has length 55 [2022-03-18 05:23:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:05,309 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1072 transitions. [2022-03-18 05:23:05,309 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) [2022-03-18 05:23:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1072 transitions. [2022-03-18 05:23:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 05:23:05,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:05,312 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:05,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 05:23:05,313 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-03-18 05:23:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374359747] [2022-03-18 05:23:05,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 2 times [2022-03-18 05:23:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:05,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40925056] [2022-03-18 05:23:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:05,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:05,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40925056] [2022-03-18 05:23:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40925056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:05,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:05,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:05,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374359747] [2022-03-18 05:23:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374359747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:05,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:05,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187714327] [2022-03-18 05:23:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:05,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:23:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:23:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:23:05,496 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) [2022-03-18 05:23:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:07,765 INFO L93 Difference]: Finished difference Result 974 states and 1354 transitions. [2022-03-18 05:23:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:23:07,766 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 [2022-03-18 05:23:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:07,768 INFO L225 Difference]: With dead ends: 974 [2022-03-18 05:23:07,769 INFO L226 Difference]: Without dead ends: 931 [2022-03-18 05:23:07,769 INFO L911 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 [2022-03-18 05:23:07,769 INFO L912 BasicCegarLoop]: 675 mSDtfsCounter, 1170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:07,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1314 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:23:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-03-18 05:23:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 789. [2022-03-18 05:23:07,972 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) [2022-03-18 05:23:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-03-18 05:23:07,974 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-03-18 05:23:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:07,974 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-03-18 05:23:07,974 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) [2022-03-18 05:23:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-03-18 05:23:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:23:07,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:07,976 INFO L500 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] [2022-03-18 05:23:07,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 05:23:07,977 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 1 times [2022-03-18 05:23:07,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233856281] [2022-03-18 05:23:07,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 2 times [2022-03-18 05:23:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:07,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241850784] [2022-03-18 05:23:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 05:23:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-18 05:23:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:08,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241850784] [2022-03-18 05:23:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241850784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:08,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:08,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:23:08,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233856281] [2022-03-18 05:23:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233856281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:08,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:08,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:23:08,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525173307] [2022-03-18 05:23:08,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:08,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:23:08,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:23:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:23:08,144 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) [2022-03-18 05:23:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:09,389 INFO L93 Difference]: Finished difference Result 1224 states and 1667 transitions. [2022-03-18 05:23:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:23:09,390 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 [2022-03-18 05:23:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:09,393 INFO L225 Difference]: With dead ends: 1224 [2022-03-18 05:23:09,393 INFO L226 Difference]: Without dead ends: 778 [2022-03-18 05:23:09,394 INFO L911 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 [2022-03-18 05:23:09,394 INFO L912 BasicCegarLoop]: 530 mSDtfsCounter, 1764 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:09,395 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 797 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:23:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-18 05:23:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-03-18 05:23:09,617 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) [2022-03-18 05:23:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1042 transitions. [2022-03-18 05:23:09,619 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1042 transitions. Word has length 73 [2022-03-18 05:23:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:09,619 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1042 transitions. [2022-03-18 05:23:09,620 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) [2022-03-18 05:23:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1042 transitions. [2022-03-18 05:23:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 05:23:09,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:09,622 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:09,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 05:23:09,622 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:09,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-03-18 05:23:09,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846228472] [2022-03-18 05:23:09,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 2 times [2022-03-18 05:23:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736505930] [2022-03-18 05:23:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:09,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 05:23:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:09,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:09,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736505930] [2022-03-18 05:23:09,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736505930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:09,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:09,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:23:09,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846228472] [2022-03-18 05:23:09,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846228472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:09,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:09,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:23:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862293709] [2022-03-18 05:23:09,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:09,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:23:09,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:23:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:23:09,770 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) [2022-03-18 05:23:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:11,079 INFO L93 Difference]: Finished difference Result 911 states and 1202 transitions. [2022-03-18 05:23:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:23:11,080 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 [2022-03-18 05:23:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:11,082 INFO L225 Difference]: With dead ends: 911 [2022-03-18 05:23:11,083 INFO L226 Difference]: Without dead ends: 820 [2022-03-18 05:23:11,083 INFO L911 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 [2022-03-18 05:23:11,083 INFO L912 BasicCegarLoop]: 606 mSDtfsCounter, 1177 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:11,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1027 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:23:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-18 05:23:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 788. [2022-03-18 05:23:11,261 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) [2022-03-18 05:23:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1048 transitions. [2022-03-18 05:23:11,262 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1048 transitions. Word has length 61 [2022-03-18 05:23:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:11,262 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 1048 transitions. [2022-03-18 05:23:11,262 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) [2022-03-18 05:23:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1048 transitions. [2022-03-18 05:23:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 05:23:11,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:11,264 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:11,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 05:23:11,264 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-03-18 05:23:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:11,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [895020632] [2022-03-18 05:23:11,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 2 times [2022-03-18 05:23:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:11,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363443833] [2022-03-18 05:23:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 05:23:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:11,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363443833] [2022-03-18 05:23:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363443833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:11,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:11,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:11,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [895020632] [2022-03-18 05:23:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [895020632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:11,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:11,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4127806] [2022-03-18 05:23:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:11,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:23:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:23:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:23:11,602 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) [2022-03-18 05:23:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:14,229 INFO L93 Difference]: Finished difference Result 814 states and 1076 transitions. [2022-03-18 05:23:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:23:14,229 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 [2022-03-18 05:23:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:14,232 INFO L225 Difference]: With dead ends: 814 [2022-03-18 05:23:14,232 INFO L226 Difference]: Without dead ends: 790 [2022-03-18 05:23:14,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-18 05:23:14,233 INFO L912 BasicCegarLoop]: 583 mSDtfsCounter, 709 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 5602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:14,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 2390 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 5602 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 05:23:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-18 05:23:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-03-18 05:23:14,415 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) [2022-03-18 05:23:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1044 transitions. [2022-03-18 05:23:14,417 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1044 transitions. Word has length 62 [2022-03-18 05:23:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:14,417 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 1044 transitions. [2022-03-18 05:23:14,417 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) [2022-03-18 05:23:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1044 transitions. [2022-03-18 05:23:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 05:23:14,419 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:14,419 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:14,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 05:23:14,419 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-03-18 05:23:14,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:14,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960877316] [2022-03-18 05:23:14,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:14,420 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 2 times [2022-03-18 05:23:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67815174] [2022-03-18 05:23:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:14,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:14,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:14,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67815174] [2022-03-18 05:23:14,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67815174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:14,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:14,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:14,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:14,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960877316] [2022-03-18 05:23:14,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960877316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:14,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:14,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361751177] [2022-03-18 05:23:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:14,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:23:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:23:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:23:14,699 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) [2022-03-18 05:23:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:17,208 INFO L93 Difference]: Finished difference Result 812 states and 1072 transitions. [2022-03-18 05:23:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:23:17,209 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 [2022-03-18 05:23:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:17,211 INFO L225 Difference]: With dead ends: 812 [2022-03-18 05:23:17,211 INFO L226 Difference]: Without dead ends: 787 [2022-03-18 05:23:17,212 INFO L911 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 [2022-03-18 05:23:17,212 INFO L912 BasicCegarLoop]: 562 mSDtfsCounter, 717 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 5342 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:17,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2154 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5342 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 05:23:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-03-18 05:23:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2022-03-18 05:23:17,398 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) [2022-03-18 05:23:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1033 transitions. [2022-03-18 05:23:17,400 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1033 transitions. Word has length 59 [2022-03-18 05:23:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:17,400 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 1033 transitions. [2022-03-18 05:23:17,400 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) [2022-03-18 05:23:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1033 transitions. [2022-03-18 05:23:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 05:23:17,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:17,402 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:17,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 05:23:17,402 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-03-18 05:23:17,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:17,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025037929] [2022-03-18 05:23:17,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 2 times [2022-03-18 05:23:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:17,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757363125] [2022-03-18 05:23:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:17,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757363125] [2022-03-18 05:23:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757363125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:17,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:17,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:17,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025037929] [2022-03-18 05:23:17,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025037929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:17,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:17,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:17,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357274855] [2022-03-18 05:23:17,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:17,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:23:17,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:23:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:17,653 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) [2022-03-18 05:23:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:20,007 INFO L93 Difference]: Finished difference Result 802 states and 1051 transitions. [2022-03-18 05:23:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 05:23:20,007 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 [2022-03-18 05:23:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:20,010 INFO L225 Difference]: With dead ends: 802 [2022-03-18 05:23:20,010 INFO L226 Difference]: Without dead ends: 782 [2022-03-18 05:23:20,010 INFO L911 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 [2022-03-18 05:23:20,011 INFO L912 BasicCegarLoop]: 572 mSDtfsCounter, 641 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:20,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2143 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 05:23:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-18 05:23:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2022-03-18 05:23:20,199 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) [2022-03-18 05:23:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1028 transitions. [2022-03-18 05:23:20,200 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1028 transitions. Word has length 58 [2022-03-18 05:23:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:20,201 INFO L478 AbstractCegarLoop]: Abstraction has 782 states and 1028 transitions. [2022-03-18 05:23:20,201 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) [2022-03-18 05:23:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1028 transitions. [2022-03-18 05:23:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 05:23:20,202 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:20,203 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:20,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 05:23:20,203 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-03-18 05:23:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:20,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513868701] [2022-03-18 05:23:20,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 2 times [2022-03-18 05:23:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:20,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163319517] [2022-03-18 05:23:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 05:23:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163319517] [2022-03-18 05:23:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163319517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:20,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:20,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:20,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513868701] [2022-03-18 05:23:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513868701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:20,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:20,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782541766] [2022-03-18 05:23:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:20,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:23:20,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:20,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:23:20,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:20,452 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) [2022-03-18 05:23:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:22,622 INFO L93 Difference]: Finished difference Result 835 states and 1083 transitions. [2022-03-18 05:23:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:23:22,623 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 [2022-03-18 05:23:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:22,625 INFO L225 Difference]: With dead ends: 835 [2022-03-18 05:23:22,625 INFO L226 Difference]: Without dead ends: 770 [2022-03-18 05:23:22,625 INFO L911 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 [2022-03-18 05:23:22,626 INFO L912 BasicCegarLoop]: 567 mSDtfsCounter, 963 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 4086 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 4432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 4086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:22,626 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1937 Invalid, 4432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 4086 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:23:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-18 05:23:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2022-03-18 05:23:22,817 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) [2022-03-18 05:23:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1007 transitions. [2022-03-18 05:23:22,819 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1007 transitions. Word has length 59 [2022-03-18 05:23:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:22,819 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 1007 transitions. [2022-03-18 05:23:22,819 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) [2022-03-18 05:23:22,819 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1007 transitions. [2022-03-18 05:23:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 05:23:22,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:22,820 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:22,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 05:23:22,820 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-03-18 05:23:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902773405] [2022-03-18 05:23:22,821 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 2 times [2022-03-18 05:23:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787499841] [2022-03-18 05:23:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 05:23:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787499841] [2022-03-18 05:23:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787499841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:23:22,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902773405] [2022-03-18 05:23:22,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902773405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:23:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623297708] [2022-03-18 05:23:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:22,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:23:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:23:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:23:22,986 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) [2022-03-18 05:23:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:24,464 INFO L93 Difference]: Finished difference Result 913 states and 1205 transitions. [2022-03-18 05:23:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:23:24,464 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 [2022-03-18 05:23:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:24,467 INFO L225 Difference]: With dead ends: 913 [2022-03-18 05:23:24,467 INFO L226 Difference]: Without dead ends: 808 [2022-03-18 05:23:24,467 INFO L911 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 [2022-03-18 05:23:24,468 INFO L912 BasicCegarLoop]: 536 mSDtfsCounter, 972 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:24,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1181 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 05:23:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-03-18 05:23:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 777. [2022-03-18 05:23:24,649 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) [2022-03-18 05:23:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1022 transitions. [2022-03-18 05:23:24,650 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1022 transitions. Word has length 60 [2022-03-18 05:23:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:24,650 INFO L478 AbstractCegarLoop]: Abstraction has 777 states and 1022 transitions. [2022-03-18 05:23:24,650 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) [2022-03-18 05:23:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1022 transitions. [2022-03-18 05:23:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 05:23:24,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:24,652 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:24,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 05:23:24,652 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-03-18 05:23:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276208133] [2022-03-18 05:23:24,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 2 times [2022-03-18 05:23:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346382204] [2022-03-18 05:23:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 05:23:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:24,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346382204] [2022-03-18 05:23:24,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346382204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:24,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:24,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:24,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:24,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276208133] [2022-03-18 05:23:24,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276208133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:24,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:24,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:24,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160407111] [2022-03-18 05:23:24,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:24,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:23:24,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:23:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:24,882 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) [2022-03-18 05:23:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:26,793 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2022-03-18 05:23:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:23:26,793 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 [2022-03-18 05:23:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:26,797 INFO L225 Difference]: With dead ends: 799 [2022-03-18 05:23:26,797 INFO L226 Difference]: Without dead ends: 775 [2022-03-18 05:23:26,799 INFO L911 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 [2022-03-18 05:23:26,799 INFO L912 BasicCegarLoop]: 535 mSDtfsCounter, 366 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:26,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1766 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 05:23:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-18 05:23:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-18 05:23:26,999 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) [2022-03-18 05:23:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1018 transitions. [2022-03-18 05:23:27,001 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1018 transitions. Word has length 60 [2022-03-18 05:23:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:27,001 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1018 transitions. [2022-03-18 05:23:27,001 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) [2022-03-18 05:23:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1018 transitions. [2022-03-18 05:23:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 05:23:27,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:27,002 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:27,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 05:23:27,003 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-03-18 05:23:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [51097756] [2022-03-18 05:23:27,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 2 times [2022-03-18 05:23:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545187292] [2022-03-18 05:23:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:23:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:27,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545187292] [2022-03-18 05:23:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545187292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:27,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [51097756] [2022-03-18 05:23:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [51097756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775020036] [2022-03-18 05:23:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:27,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:23:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:23:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:27,250 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) [2022-03-18 05:23:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:29,386 INFO L93 Difference]: Finished difference Result 837 states and 1087 transitions. [2022-03-18 05:23:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:23:29,386 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 [2022-03-18 05:23:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:29,388 INFO L225 Difference]: With dead ends: 837 [2022-03-18 05:23:29,388 INFO L226 Difference]: Without dead ends: 767 [2022-03-18 05:23:29,389 INFO L911 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 [2022-03-18 05:23:29,389 INFO L912 BasicCegarLoop]: 529 mSDtfsCounter, 659 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:29,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1766 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 05:23:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-18 05:23:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-03-18 05:23:29,579 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) [2022-03-18 05:23:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1002 transitions. [2022-03-18 05:23:29,580 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1002 transitions. Word has length 60 [2022-03-18 05:23:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:29,580 INFO L478 AbstractCegarLoop]: Abstraction has 767 states and 1002 transitions. [2022-03-18 05:23:29,580 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) [2022-03-18 05:23:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1002 transitions. [2022-03-18 05:23:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 05:23:29,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:29,582 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:29,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 05:23:29,582 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-03-18 05:23:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:29,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412368761] [2022-03-18 05:23:29,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 2 times [2022-03-18 05:23:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:29,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031400572] [2022-03-18 05:23:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:23:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:29,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031400572] [2022-03-18 05:23:29,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031400572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:29,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:29,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:29,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412368761] [2022-03-18 05:23:29,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412368761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:29,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:29,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10008022] [2022-03-18 05:23:29,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:29,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:29,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:29,752 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) [2022-03-18 05:23:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:31,265 INFO L93 Difference]: Finished difference Result 813 states and 1068 transitions. [2022-03-18 05:23:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:23:31,265 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 [2022-03-18 05:23:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:31,269 INFO L225 Difference]: With dead ends: 813 [2022-03-18 05:23:31,269 INFO L226 Difference]: Without dead ends: 779 [2022-03-18 05:23:31,269 INFO L911 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 [2022-03-18 05:23:31,270 INFO L912 BasicCegarLoop]: 518 mSDtfsCounter, 636 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:31,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 1123 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 05:23:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-18 05:23:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 771. [2022-03-18 05:23:31,453 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) [2022-03-18 05:23:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1020 transitions. [2022-03-18 05:23:31,455 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1020 transitions. Word has length 61 [2022-03-18 05:23:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:31,455 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1020 transitions. [2022-03-18 05:23:31,455 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) [2022-03-18 05:23:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1020 transitions. [2022-03-18 05:23:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:23:31,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:31,456 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:31,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 05:23:31,457 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-03-18 05:23:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:31,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268259608] [2022-03-18 05:23:31,457 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 2 times [2022-03-18 05:23:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:31,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596033565] [2022-03-18 05:23:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:31,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:31,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596033565] [2022-03-18 05:23:31,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596033565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:31,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:31,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:23:31,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:31,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268259608] [2022-03-18 05:23:31,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268259608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:31,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:31,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:23:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098852922] [2022-03-18 05:23:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:31,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:23:31,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:31,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:23:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:23:31,763 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) [2022-03-18 05:23:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:34,368 INFO L93 Difference]: Finished difference Result 788 states and 1038 transitions. [2022-03-18 05:23:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:23:34,368 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 [2022-03-18 05:23:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:34,370 INFO L225 Difference]: With dead ends: 788 [2022-03-18 05:23:34,370 INFO L226 Difference]: Without dead ends: 766 [2022-03-18 05:23:34,370 INFO L911 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 [2022-03-18 05:23:34,370 INFO L912 BasicCegarLoop]: 531 mSDtfsCounter, 883 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 5376 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:34,371 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 2405 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 5376 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 05:23:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-03-18 05:23:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-03-18 05:23:34,547 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) [2022-03-18 05:23:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1013 transitions. [2022-03-18 05:23:34,549 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1013 transitions. Word has length 63 [2022-03-18 05:23:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:34,549 INFO L478 AbstractCegarLoop]: Abstraction has 766 states and 1013 transitions. [2022-03-18 05:23:34,549 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) [2022-03-18 05:23:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1013 transitions. [2022-03-18 05:23:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 05:23:34,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:34,551 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:34,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 05:23:34,552 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-03-18 05:23:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:34,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34219850] [2022-03-18 05:23:34,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 2 times [2022-03-18 05:23:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:34,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180026168] [2022-03-18 05:23:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:34,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180026168] [2022-03-18 05:23:34,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180026168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:34,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:34,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:23:34,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34219850] [2022-03-18 05:23:34,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34219850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:34,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:34,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:23:34,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324410900] [2022-03-18 05:23:34,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:34,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:23:34,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:23:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:23:34,813 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) [2022-03-18 05:23:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:36,997 INFO L93 Difference]: Finished difference Result 783 states and 1031 transitions. [2022-03-18 05:23:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:23:36,998 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 [2022-03-18 05:23:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:36,999 INFO L225 Difference]: With dead ends: 783 [2022-03-18 05:23:36,999 INFO L226 Difference]: Without dead ends: 761 [2022-03-18 05:23:37,000 INFO L911 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 [2022-03-18 05:23:37,000 INFO L912 BasicCegarLoop]: 521 mSDtfsCounter, 591 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:37,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 2230 Invalid, 5407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 05:23:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-18 05:23:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-03-18 05:23:37,173 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) [2022-03-18 05:23:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1006 transitions. [2022-03-18 05:23:37,174 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1006 transitions. Word has length 62 [2022-03-18 05:23:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:37,175 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 1006 transitions. [2022-03-18 05:23:37,175 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) [2022-03-18 05:23:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1006 transitions. [2022-03-18 05:23:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 05:23:37,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:37,177 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:37,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 05:23:37,177 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-03-18 05:23:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:37,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082954504] [2022-03-18 05:23:37,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:37,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 2 times [2022-03-18 05:23:37,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:37,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537447262] [2022-03-18 05:23:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:37,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537447262] [2022-03-18 05:23:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537447262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:37,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:37,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082954504] [2022-03-18 05:23:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082954504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:37,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728292605] [2022-03-18 05:23:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:37,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:23:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:23:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:23:37,512 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) [2022-03-18 05:23:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:39,929 INFO L93 Difference]: Finished difference Result 785 states and 1031 transitions. [2022-03-18 05:23:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 05:23:39,931 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 [2022-03-18 05:23:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:39,934 INFO L225 Difference]: With dead ends: 785 [2022-03-18 05:23:39,934 INFO L226 Difference]: Without dead ends: 761 [2022-03-18 05:23:39,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:23:39,935 INFO L912 BasicCegarLoop]: 516 mSDtfsCounter, 1780 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:39,935 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2244 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 05:23:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-18 05:23:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 759. [2022-03-18 05:23:40,138 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) [2022-03-18 05:23:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1002 transitions. [2022-03-18 05:23:40,140 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1002 transitions. Word has length 67 [2022-03-18 05:23:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:40,140 INFO L478 AbstractCegarLoop]: Abstraction has 759 states and 1002 transitions. [2022-03-18 05:23:40,140 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) [2022-03-18 05:23:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1002 transitions. [2022-03-18 05:23:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:23:40,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:40,142 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:40,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-18 05:23:40,142 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-03-18 05:23:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289878117] [2022-03-18 05:23:40,142 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 2 times [2022-03-18 05:23:40,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103386366] [2022-03-18 05:23:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:23:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:40,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103386366] [2022-03-18 05:23:40,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103386366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:40,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:40,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:40,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289878117] [2022-03-18 05:23:40,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289878117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:40,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:40,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:23:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093905236] [2022-03-18 05:23:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:40,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:23:40,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:23:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:23:40,450 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) [2022-03-18 05:23:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:42,945 INFO L93 Difference]: Finished difference Result 781 states and 1025 transitions. [2022-03-18 05:23:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 05:23:42,946 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 [2022-03-18 05:23:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:42,948 INFO L225 Difference]: With dead ends: 781 [2022-03-18 05:23:42,948 INFO L226 Difference]: Without dead ends: 757 [2022-03-18 05:23:42,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-18 05:23:42,948 INFO L912 BasicCegarLoop]: 493 mSDtfsCounter, 1456 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:42,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2141 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 05:23:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-18 05:23:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2022-03-18 05:23:43,137 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) [2022-03-18 05:23:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 998 transitions. [2022-03-18 05:23:43,138 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 998 transitions. Word has length 63 [2022-03-18 05:23:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:43,138 INFO L478 AbstractCegarLoop]: Abstraction has 757 states and 998 transitions. [2022-03-18 05:23:43,138 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) [2022-03-18 05:23:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 998 transitions. [2022-03-18 05:23:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:23:43,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:43,140 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:43,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-18 05:23:43,140 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-03-18 05:23:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530702787] [2022-03-18 05:23:43,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 2 times [2022-03-18 05:23:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056849347] [2022-03-18 05:23:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:23:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:43,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056849347] [2022-03-18 05:23:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056849347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:43,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:43,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530702787] [2022-03-18 05:23:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530702787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:43,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824687060] [2022-03-18 05:23:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:43,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:23:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:23:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:23:43,303 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) [2022-03-18 05:23:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:44,313 INFO L93 Difference]: Finished difference Result 1021 states and 1347 transitions. [2022-03-18 05:23:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:23:44,313 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 [2022-03-18 05:23:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:44,316 INFO L225 Difference]: With dead ends: 1021 [2022-03-18 05:23:44,316 INFO L226 Difference]: Without dead ends: 702 [2022-03-18 05:23:44,317 INFO L911 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 [2022-03-18 05:23:44,317 INFO L912 BasicCegarLoop]: 487 mSDtfsCounter, 1149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:44,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 863 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:23:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-18 05:23:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2022-03-18 05:23:44,494 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) [2022-03-18 05:23:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 882 transitions. [2022-03-18 05:23:44,495 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 882 transitions. Word has length 63 [2022-03-18 05:23:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:44,495 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 882 transitions. [2022-03-18 05:23:44,495 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) [2022-03-18 05:23:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 882 transitions. [2022-03-18 05:23:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 05:23:44,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:44,497 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:44,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-18 05:23:44,497 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:44,498 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-03-18 05:23:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:44,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269386786] [2022-03-18 05:23:44,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:44,498 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 2 times [2022-03-18 05:23:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:44,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848145775] [2022-03-18 05:23:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 05:23:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:44,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848145775] [2022-03-18 05:23:44,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848145775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:44,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:44,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:23:44,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269386786] [2022-03-18 05:23:44,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269386786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:44,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:44,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:23:44,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334595892] [2022-03-18 05:23:44,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:44,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:23:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:23:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:23:44,654 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) [2022-03-18 05:23:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:45,794 INFO L93 Difference]: Finished difference Result 805 states and 1038 transitions. [2022-03-18 05:23:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:23:45,794 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 [2022-03-18 05:23:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:45,796 INFO L225 Difference]: With dead ends: 805 [2022-03-18 05:23:45,796 INFO L226 Difference]: Without dead ends: 685 [2022-03-18 05:23:45,796 INFO L911 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 [2022-03-18 05:23:45,797 INFO L912 BasicCegarLoop]: 463 mSDtfsCounter, 338 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:45,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 849 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:23:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-18 05:23:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-03-18 05:23:45,959 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) [2022-03-18 05:23:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-03-18 05:23:45,960 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 66 [2022-03-18 05:23:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:45,960 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-03-18 05:23:45,961 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) [2022-03-18 05:23:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-03-18 05:23:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 05:23:45,962 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:45,962 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:45,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-18 05:23:45,962 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-03-18 05:23:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546604794] [2022-03-18 05:23:45,963 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 2 times [2022-03-18 05:23:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437054122] [2022-03-18 05:23:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:23:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437054122] [2022-03-18 05:23:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437054122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:46,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:46,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:46,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546604794] [2022-03-18 05:23:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546604794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:46,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:46,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879564823] [2022-03-18 05:23:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:46,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:23:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:23:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:23:46,285 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) [2022-03-18 05:23:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:48,576 INFO L93 Difference]: Finished difference Result 707 states and 903 transitions. [2022-03-18 05:23:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:23:48,577 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 [2022-03-18 05:23:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:48,579 INFO L225 Difference]: With dead ends: 707 [2022-03-18 05:23:48,579 INFO L226 Difference]: Without dead ends: 683 [2022-03-18 05:23:48,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:23:48,579 INFO L912 BasicCegarLoop]: 470 mSDtfsCounter, 1194 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 5233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:48,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 2046 Invalid, 5233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 05:23:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-18 05:23:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-03-18 05:23:48,728 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) [2022-03-18 05:23:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 876 transitions. [2022-03-18 05:23:48,730 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 876 transitions. Word has length 66 [2022-03-18 05:23:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:48,730 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 876 transitions. [2022-03-18 05:23:48,730 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) [2022-03-18 05:23:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 876 transitions. [2022-03-18 05:23:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 05:23:48,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:48,731 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:48,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-18 05:23:48,731 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-03-18 05:23:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989739045] [2022-03-18 05:23:48,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 2 times [2022-03-18 05:23:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695960190] [2022-03-18 05:23:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:23:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:23:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695960190] [2022-03-18 05:23:48,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695960190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:48,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:48,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:48,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989739045] [2022-03-18 05:23:48,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989739045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:48,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:48,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490301337] [2022-03-18 05:23:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:48,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:48,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:48,930 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) [2022-03-18 05:23:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:50,226 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2022-03-18 05:23:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 05:23:50,226 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 [2022-03-18 05:23:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:50,228 INFO L225 Difference]: With dead ends: 747 [2022-03-18 05:23:50,228 INFO L226 Difference]: Without dead ends: 714 [2022-03-18 05:23:50,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:23:50,229 INFO L912 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 [2022-03-18 05:23:50,229 INFO L913 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] [2022-03-18 05:23:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-18 05:23:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-03-18 05:23:50,393 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) [2022-03-18 05:23:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 884 transitions. [2022-03-18 05:23:50,394 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 884 transitions. Word has length 65 [2022-03-18 05:23:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:50,394 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 884 transitions. [2022-03-18 05:23:50,394 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) [2022-03-18 05:23:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 884 transitions. [2022-03-18 05:23:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 05:23:50,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:50,396 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:50,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-18 05:23:50,396 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-03-18 05:23:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815157134] [2022-03-18 05:23:50,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 2 times [2022-03-18 05:23:50,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:50,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5742143] [2022-03-18 05:23:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:50,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:23:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5742143] [2022-03-18 05:23:50,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5742143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:50,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:50,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:50,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815157134] [2022-03-18 05:23:50,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815157134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:50,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:50,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157472855] [2022-03-18 05:23:50,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:50,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:50,594 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) [2022-03-18 05:23:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:51,776 INFO L93 Difference]: Finished difference Result 745 states and 945 transitions. [2022-03-18 05:23:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:23:51,777 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 [2022-03-18 05:23:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:51,778 INFO L225 Difference]: With dead ends: 745 [2022-03-18 05:23:51,778 INFO L226 Difference]: Without dead ends: 691 [2022-03-18 05:23:51,779 INFO L911 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 [2022-03-18 05:23:51,779 INFO L912 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:51,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 997 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:23:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-18 05:23:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-03-18 05:23:51,944 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) [2022-03-18 05:23:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 882 transitions. [2022-03-18 05:23:51,946 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 882 transitions. Word has length 66 [2022-03-18 05:23:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:51,946 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 882 transitions. [2022-03-18 05:23:51,946 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) [2022-03-18 05:23:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 882 transitions. [2022-03-18 05:23:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 05:23:51,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:51,948 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:51,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-18 05:23:51,948 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-03-18 05:23:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305080545] [2022-03-18 05:23:51,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 2 times [2022-03-18 05:23:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885115116] [2022-03-18 05:23:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:23:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:52,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885115116] [2022-03-18 05:23:52,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885115116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:52,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:52,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:52,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305080545] [2022-03-18 05:23:52,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305080545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:52,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:52,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:23:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352242372] [2022-03-18 05:23:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:52,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:23:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:23:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:23:52,173 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) [2022-03-18 05:23:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:54,235 INFO L93 Difference]: Finished difference Result 716 states and 912 transitions. [2022-03-18 05:23:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:23:54,235 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 [2022-03-18 05:23:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:54,236 INFO L225 Difference]: With dead ends: 716 [2022-03-18 05:23:54,237 INFO L226 Difference]: Without dead ends: 658 [2022-03-18 05:23:54,237 INFO L911 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 [2022-03-18 05:23:54,237 INFO L912 BasicCegarLoop]: 477 mSDtfsCounter, 361 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:54,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1642 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 05:23:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-18 05:23:54,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2022-03-18 05:23:54,384 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) [2022-03-18 05:23:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-03-18 05:23:54,385 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 66 [2022-03-18 05:23:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:54,385 INFO L478 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-03-18 05:23:54,385 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) [2022-03-18 05:23:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-03-18 05:23:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 05:23:54,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:54,386 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:54,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-18 05:23:54,386 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-03-18 05:23:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849303904] [2022-03-18 05:23:54,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 2 times [2022-03-18 05:23:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506144831] [2022-03-18 05:23:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 05:23:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:54,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506144831] [2022-03-18 05:23:54,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506144831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:54,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:54,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:54,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:54,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849303904] [2022-03-18 05:23:54,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849303904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:54,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:54,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158979793] [2022-03-18 05:23:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:54,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:54,580 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) [2022-03-18 05:23:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:55,668 INFO L93 Difference]: Finished difference Result 686 states and 856 transitions. [2022-03-18 05:23:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:23:55,668 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 [2022-03-18 05:23:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:55,670 INFO L225 Difference]: With dead ends: 686 [2022-03-18 05:23:55,670 INFO L226 Difference]: Without dead ends: 647 [2022-03-18 05:23:55,670 INFO L911 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 [2022-03-18 05:23:55,670 INFO L912 BasicCegarLoop]: 424 mSDtfsCounter, 510 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:55,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1027 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:23:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-03-18 05:23:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-03-18 05:23:55,817 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) [2022-03-18 05:23:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 814 transitions. [2022-03-18 05:23:55,818 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 814 transitions. Word has length 67 [2022-03-18 05:23:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:55,818 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 814 transitions. [2022-03-18 05:23:55,818 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) [2022-03-18 05:23:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 814 transitions. [2022-03-18 05:23:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 05:23:55,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:55,819 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:55,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-18 05:23:55,819 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-03-18 05:23:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:55,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470021461] [2022-03-18 05:23:55,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 2 times [2022-03-18 05:23:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:55,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477488407] [2022-03-18 05:23:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477488407] [2022-03-18 05:23:55,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477488407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:55,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:55,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470021461] [2022-03-18 05:23:55,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470021461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:55,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:23:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430858622] [2022-03-18 05:23:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:55,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:23:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:23:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:23:55,995 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) [2022-03-18 05:23:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:57,189 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2022-03-18 05:23:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:23:57,190 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 [2022-03-18 05:23:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:57,192 INFO L225 Difference]: With dead ends: 771 [2022-03-18 05:23:57,192 INFO L226 Difference]: Without dead ends: 763 [2022-03-18 05:23:57,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:23:57,192 INFO L912 BasicCegarLoop]: 453 mSDtfsCounter, 907 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:57,192 INFO L913 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] [2022-03-18 05:23:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-18 05:23:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 689. [2022-03-18 05:23:57,394 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) [2022-03-18 05:23:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 861 transitions. [2022-03-18 05:23:57,395 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 861 transitions. Word has length 67 [2022-03-18 05:23:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:57,395 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 861 transitions. [2022-03-18 05:23:57,395 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) [2022-03-18 05:23:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 861 transitions. [2022-03-18 05:23:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 05:23:57,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:57,396 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:57,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-18 05:23:57,397 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-03-18 05:23:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509205564] [2022-03-18 05:23:57,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 2 times [2022-03-18 05:23:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480778796] [2022-03-18 05:23:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:23:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:57,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:57,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480778796] [2022-03-18 05:23:57,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480778796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:57,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:57,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:57,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509205564] [2022-03-18 05:23:57,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509205564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:57,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:57,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:57,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614437326] [2022-03-18 05:23:57,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:57,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:57,578 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) [2022-03-18 05:23:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:58,986 INFO L93 Difference]: Finished difference Result 767 states and 959 transitions. [2022-03-18 05:23:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:23:58,986 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 [2022-03-18 05:23:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:58,988 INFO L225 Difference]: With dead ends: 767 [2022-03-18 05:23:58,988 INFO L226 Difference]: Without dead ends: 761 [2022-03-18 05:23:58,988 INFO L911 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 [2022-03-18 05:23:58,988 INFO L912 BasicCegarLoop]: 455 mSDtfsCounter, 1189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:58,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 821 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:23:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-18 05:23:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 689. [2022-03-18 05:23:59,220 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) [2022-03-18 05:23:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 860 transitions. [2022-03-18 05:23:59,221 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 860 transitions. Word has length 68 [2022-03-18 05:23:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:59,222 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 860 transitions. [2022-03-18 05:23:59,222 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) [2022-03-18 05:23:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 860 transitions. [2022-03-18 05:23:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 05:23:59,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:59,223 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:59,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-18 05:23:59,223 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-03-18 05:23:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670550310] [2022-03-18 05:23:59,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 2 times [2022-03-18 05:23:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324334782] [2022-03-18 05:23:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:23:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:23:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:23:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:23:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:59,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324334782] [2022-03-18 05:23:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324334782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:59,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:59,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:59,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:59,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670550310] [2022-03-18 05:23:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670550310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:59,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:59,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:23:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303553869] [2022-03-18 05:23:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:59,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:23:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:23:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:23:59,528 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) [2022-03-18 05:24:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:01,860 INFO L93 Difference]: Finished difference Result 722 states and 899 transitions. [2022-03-18 05:24:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 05:24:01,860 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 [2022-03-18 05:24:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:01,862 INFO L225 Difference]: With dead ends: 722 [2022-03-18 05:24:01,862 INFO L226 Difference]: Without dead ends: 698 [2022-03-18 05:24:01,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:24:01,863 INFO L912 BasicCegarLoop]: 434 mSDtfsCounter, 311 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:01,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2212 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 05:24:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-18 05:24:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 687. [2022-03-18 05:24:02,027 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) [2022-03-18 05:24:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2022-03-18 05:24:02,028 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 74 [2022-03-18 05:24:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:02,028 INFO L478 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2022-03-18 05:24:02,028 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) [2022-03-18 05:24:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2022-03-18 05:24:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 05:24:02,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:02,029 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:02,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-18 05:24:02,029 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-03-18 05:24:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437719670] [2022-03-18 05:24:02,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 2 times [2022-03-18 05:24:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144930222] [2022-03-18 05:24:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 05:24:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:02,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144930222] [2022-03-18 05:24:02,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144930222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:02,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:02,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 05:24:02,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437719670] [2022-03-18 05:24:02,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437719670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:02,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:02,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 05:24:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535826741] [2022-03-18 05:24:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:02,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 05:24:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 05:24:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-18 05:24:02,361 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) [2022-03-18 05:24:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:04,706 INFO L93 Difference]: Finished difference Result 711 states and 882 transitions. [2022-03-18 05:24:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 05:24:04,707 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 [2022-03-18 05:24:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:04,708 INFO L225 Difference]: With dead ends: 711 [2022-03-18 05:24:04,708 INFO L226 Difference]: Without dead ends: 684 [2022-03-18 05:24:04,709 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 05:24:04,709 INFO L912 BasicCegarLoop]: 426 mSDtfsCounter, 789 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:04,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2269 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4575 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 05:24:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-18 05:24:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-03-18 05:24:04,870 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) [2022-03-18 05:24:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 851 transitions. [2022-03-18 05:24:04,871 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 851 transitions. Word has length 70 [2022-03-18 05:24:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:04,871 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 851 transitions. [2022-03-18 05:24:04,871 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) [2022-03-18 05:24:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 851 transitions. [2022-03-18 05:24:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 05:24:04,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:04,873 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:04,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-18 05:24:04,873 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-03-18 05:24:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1813666710] [2022-03-18 05:24:04,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 2 times [2022-03-18 05:24:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236045384] [2022-03-18 05:24:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:05,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236045384] [2022-03-18 05:24:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236045384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:05,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:05,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1813666710] [2022-03-18 05:24:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1813666710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:05,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685904695] [2022-03-18 05:24:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:05,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:24:05,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:24:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:24:05,220 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) [2022-03-18 05:24:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:07,158 INFO L93 Difference]: Finished difference Result 704 states and 872 transitions. [2022-03-18 05:24:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:24:07,159 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 [2022-03-18 05:24:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:07,161 INFO L225 Difference]: With dead ends: 704 [2022-03-18 05:24:07,161 INFO L226 Difference]: Without dead ends: 682 [2022-03-18 05:24:07,161 INFO L911 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 [2022-03-18 05:24:07,161 INFO L912 BasicCegarLoop]: 421 mSDtfsCounter, 465 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:07,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 2031 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 05:24:07,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-18 05:24:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-03-18 05:24:07,329 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) [2022-03-18 05:24:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 847 transitions. [2022-03-18 05:24:07,330 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 847 transitions. Word has length 72 [2022-03-18 05:24:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:07,330 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 847 transitions. [2022-03-18 05:24:07,330 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) [2022-03-18 05:24:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 847 transitions. [2022-03-18 05:24:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 05:24:07,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:07,331 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:07,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-18 05:24:07,331 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-03-18 05:24:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:07,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167346853] [2022-03-18 05:24:07,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 2 times [2022-03-18 05:24:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595953866] [2022-03-18 05:24:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:24:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:07,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595953866] [2022-03-18 05:24:07,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595953866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:07,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:07,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:07,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167346853] [2022-03-18 05:24:07,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167346853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:07,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:07,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045485521] [2022-03-18 05:24:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:07,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:24:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:24:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:24:07,644 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) [2022-03-18 05:24:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:09,648 INFO L93 Difference]: Finished difference Result 699 states and 865 transitions. [2022-03-18 05:24:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:24:09,648 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 [2022-03-18 05:24:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:09,650 INFO L225 Difference]: With dead ends: 699 [2022-03-18 05:24:09,650 INFO L226 Difference]: Without dead ends: 670 [2022-03-18 05:24:09,651 INFO L911 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 [2022-03-18 05:24:09,651 INFO L912 BasicCegarLoop]: 414 mSDtfsCounter, 689 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:09,651 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 2003 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 05:24:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-03-18 05:24:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-03-18 05:24:09,884 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) [2022-03-18 05:24:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 831 transitions. [2022-03-18 05:24:09,886 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 831 transitions. Word has length 69 [2022-03-18 05:24:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:09,886 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 831 transitions. [2022-03-18 05:24:09,886 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) [2022-03-18 05:24:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 831 transitions. [2022-03-18 05:24:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 05:24:09,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:09,888 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:09,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-18 05:24:09,888 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-03-18 05:24:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247364723] [2022-03-18 05:24:09,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 2 times [2022-03-18 05:24:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058843739] [2022-03-18 05:24:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:10,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058843739] [2022-03-18 05:24:10,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058843739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:10,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:10,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:10,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:10,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247364723] [2022-03-18 05:24:10,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247364723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:10,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:10,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:10,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450152996] [2022-03-18 05:24:10,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:10,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:10,066 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) [2022-03-18 05:24:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:11,342 INFO L93 Difference]: Finished difference Result 704 states and 866 transitions. [2022-03-18 05:24:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:11,343 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 [2022-03-18 05:24:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:11,344 INFO L225 Difference]: With dead ends: 704 [2022-03-18 05:24:11,344 INFO L226 Difference]: Without dead ends: 665 [2022-03-18 05:24:11,344 INFO L911 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 [2022-03-18 05:24:11,345 INFO L912 BasicCegarLoop]: 395 mSDtfsCounter, 703 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:11,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 981 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-18 05:24:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-03-18 05:24:11,493 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) [2022-03-18 05:24:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 824 transitions. [2022-03-18 05:24:11,494 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 824 transitions. Word has length 69 [2022-03-18 05:24:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:11,494 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 824 transitions. [2022-03-18 05:24:11,494 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) [2022-03-18 05:24:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 824 transitions. [2022-03-18 05:24:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 05:24:11,495 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:11,495 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:11,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-18 05:24:11,496 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-03-18 05:24:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645285481] [2022-03-18 05:24:11,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 2 times [2022-03-18 05:24:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988661993] [2022-03-18 05:24:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:11,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 05:24:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:11,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988661993] [2022-03-18 05:24:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988661993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:11,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:11,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:11,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645285481] [2022-03-18 05:24:11,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645285481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:11,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:11,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035284317] [2022-03-18 05:24:11,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:11,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 05:24:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 05:24:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:11,738 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) [2022-03-18 05:24:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:13,551 INFO L93 Difference]: Finished difference Result 692 states and 854 transitions. [2022-03-18 05:24:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 05:24:13,552 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 [2022-03-18 05:24:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:13,553 INFO L225 Difference]: With dead ends: 692 [2022-03-18 05:24:13,554 INFO L226 Difference]: Without dead ends: 662 [2022-03-18 05:24:13,554 INFO L911 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 [2022-03-18 05:24:13,554 INFO L912 BasicCegarLoop]: 409 mSDtfsCounter, 260 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:13,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1933 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 05:24:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-18 05:24:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-03-18 05:24:13,744 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) [2022-03-18 05:24:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 819 transitions. [2022-03-18 05:24:13,745 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 819 transitions. Word has length 69 [2022-03-18 05:24:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:13,745 INFO L478 AbstractCegarLoop]: Abstraction has 662 states and 819 transitions. [2022-03-18 05:24:13,745 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) [2022-03-18 05:24:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 819 transitions. [2022-03-18 05:24:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 05:24:13,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:13,746 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:13,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-18 05:24:13,747 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-03-18 05:24:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438098645] [2022-03-18 05:24:13,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 2 times [2022-03-18 05:24:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950633582] [2022-03-18 05:24:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:13,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950633582] [2022-03-18 05:24:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950633582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:13,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:13,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:13,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:13,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438098645] [2022-03-18 05:24:13,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438098645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:13,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:13,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816078370] [2022-03-18 05:24:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:13,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 05:24:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 05:24:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:13,970 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) [2022-03-18 05:24:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:15,661 INFO L93 Difference]: Finished difference Result 672 states and 828 transitions. [2022-03-18 05:24:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 05:24:15,661 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 [2022-03-18 05:24:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:15,663 INFO L225 Difference]: With dead ends: 672 [2022-03-18 05:24:15,663 INFO L226 Difference]: Without dead ends: 666 [2022-03-18 05:24:15,663 INFO L911 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 [2022-03-18 05:24:15,663 INFO L912 BasicCegarLoop]: 358 mSDtfsCounter, 748 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:15,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1544 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 05:24:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-18 05:24:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 660. [2022-03-18 05:24:15,886 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) [2022-03-18 05:24:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 815 transitions. [2022-03-18 05:24:15,887 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 815 transitions. Word has length 69 [2022-03-18 05:24:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:15,887 INFO L478 AbstractCegarLoop]: Abstraction has 660 states and 815 transitions. [2022-03-18 05:24:15,887 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) [2022-03-18 05:24:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 815 transitions. [2022-03-18 05:24:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 05:24:15,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:15,888 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:15,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-18 05:24:15,889 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-03-18 05:24:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1601809822] [2022-03-18 05:24:15,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 2 times [2022-03-18 05:24:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751939757] [2022-03-18 05:24:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:16,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:16,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:16,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751939757] [2022-03-18 05:24:16,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751939757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:16,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:16,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:16,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1601809822] [2022-03-18 05:24:16,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1601809822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:16,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:16,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637522303] [2022-03-18 05:24:16,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:16,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:16,080 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) [2022-03-18 05:24:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:17,542 INFO L93 Difference]: Finished difference Result 736 states and 910 transitions. [2022-03-18 05:24:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:17,542 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 [2022-03-18 05:24:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:17,544 INFO L225 Difference]: With dead ends: 736 [2022-03-18 05:24:17,544 INFO L226 Difference]: Without dead ends: 674 [2022-03-18 05:24:17,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-03-18 05:24:17,545 INFO L912 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:17,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 802 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-18 05:24:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 604. [2022-03-18 05:24:17,691 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) [2022-03-18 05:24:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 744 transitions. [2022-03-18 05:24:17,692 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 744 transitions. Word has length 69 [2022-03-18 05:24:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:17,692 INFO L478 AbstractCegarLoop]: Abstraction has 604 states and 744 transitions. [2022-03-18 05:24:17,692 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) [2022-03-18 05:24:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 744 transitions. [2022-03-18 05:24:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 05:24:17,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:17,693 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:17,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-18 05:24:17,693 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-03-18 05:24:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077727328] [2022-03-18 05:24:17,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 2 times [2022-03-18 05:24:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:17,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818850410] [2022-03-18 05:24:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:17,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:18,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:18,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818850410] [2022-03-18 05:24:18,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818850410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:18,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:18,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:24:18,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:18,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077727328] [2022-03-18 05:24:18,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077727328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:18,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:18,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:24:18,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881655824] [2022-03-18 05:24:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:18,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:24:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:24:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:24:18,002 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) [2022-03-18 05:24:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:20,015 INFO L93 Difference]: Finished difference Result 637 states and 783 transitions. [2022-03-18 05:24:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 05:24:20,016 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 [2022-03-18 05:24:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:20,017 INFO L225 Difference]: With dead ends: 637 [2022-03-18 05:24:20,017 INFO L226 Difference]: Without dead ends: 610 [2022-03-18 05:24:20,018 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:24:20,018 INFO L912 BasicCegarLoop]: 409 mSDtfsCounter, 1108 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 4000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:20,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2200 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 05:24:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-18 05:24:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-03-18 05:24:20,224 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) [2022-03-18 05:24:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 743 transitions. [2022-03-18 05:24:20,225 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 743 transitions. Word has length 71 [2022-03-18 05:24:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:20,225 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 743 transitions. [2022-03-18 05:24:20,225 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) [2022-03-18 05:24:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 743 transitions. [2022-03-18 05:24:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 05:24:20,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:20,226 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:20,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-18 05:24:20,227 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-03-18 05:24:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765158674] [2022-03-18 05:24:20,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 2 times [2022-03-18 05:24:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058149909] [2022-03-18 05:24:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:20,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:20,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058149909] [2022-03-18 05:24:20,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058149909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:20,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:20,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:20,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765158674] [2022-03-18 05:24:20,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765158674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:20,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:20,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961053499] [2022-03-18 05:24:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:20,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:20,435 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) [2022-03-18 05:24:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:21,752 INFO L93 Difference]: Finished difference Result 644 states and 782 transitions. [2022-03-18 05:24:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:21,752 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 [2022-03-18 05:24:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:21,753 INFO L225 Difference]: With dead ends: 644 [2022-03-18 05:24:21,753 INFO L226 Difference]: Without dead ends: 599 [2022-03-18 05:24:21,753 INFO L911 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 [2022-03-18 05:24:21,754 INFO L912 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:21,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1087 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-18 05:24:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-03-18 05:24:21,889 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) [2022-03-18 05:24:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 733 transitions. [2022-03-18 05:24:21,890 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 733 transitions. Word has length 71 [2022-03-18 05:24:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:21,890 INFO L478 AbstractCegarLoop]: Abstraction has 599 states and 733 transitions. [2022-03-18 05:24:21,890 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) [2022-03-18 05:24:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 733 transitions. [2022-03-18 05:24:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 05:24:21,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:21,891 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:21,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-18 05:24:21,891 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-03-18 05:24:21,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:21,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775523191] [2022-03-18 05:24:21,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 2 times [2022-03-18 05:24:21,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:21,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868632449] [2022-03-18 05:24:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:21,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868632449] [2022-03-18 05:24:22,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868632449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:22,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:22,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:22,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:22,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775523191] [2022-03-18 05:24:22,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775523191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:22,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:22,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500395119] [2022-03-18 05:24:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:22,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:22,089 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) [2022-03-18 05:24:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:23,143 INFO L93 Difference]: Finished difference Result 637 states and 772 transitions. [2022-03-18 05:24:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:23,144 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 [2022-03-18 05:24:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:23,145 INFO L225 Difference]: With dead ends: 637 [2022-03-18 05:24:23,145 INFO L226 Difference]: Without dead ends: 593 [2022-03-18 05:24:23,145 INFO L911 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 [2022-03-18 05:24:23,146 INFO L912 BasicCegarLoop]: 382 mSDtfsCounter, 623 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:23,146 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 949 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-18 05:24:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-03-18 05:24:23,285 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) [2022-03-18 05:24:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 725 transitions. [2022-03-18 05:24:23,286 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 725 transitions. Word has length 71 [2022-03-18 05:24:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:23,286 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 725 transitions. [2022-03-18 05:24:23,286 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) [2022-03-18 05:24:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 725 transitions. [2022-03-18 05:24:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:24:23,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:23,287 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:23,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-18 05:24:23,287 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-03-18 05:24:23,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:23,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616423086] [2022-03-18 05:24:23,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 2 times [2022-03-18 05:24:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221081375] [2022-03-18 05:24:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:23,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:23,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221081375] [2022-03-18 05:24:23,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221081375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:23,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:23,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:23,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616423086] [2022-03-18 05:24:23,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616423086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:23,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:23,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266092161] [2022-03-18 05:24:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:23,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:23,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:23,460 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) [2022-03-18 05:24:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:24,493 INFO L93 Difference]: Finished difference Result 631 states and 764 transitions. [2022-03-18 05:24:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:24,493 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 [2022-03-18 05:24:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:24,495 INFO L225 Difference]: With dead ends: 631 [2022-03-18 05:24:24,495 INFO L226 Difference]: Without dead ends: 581 [2022-03-18 05:24:24,495 INFO L911 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 [2022-03-18 05:24:24,495 INFO L912 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:24,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 886 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-18 05:24:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-03-18 05:24:24,693 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) [2022-03-18 05:24:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 707 transitions. [2022-03-18 05:24:24,694 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 707 transitions. Word has length 73 [2022-03-18 05:24:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:24,694 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 707 transitions. [2022-03-18 05:24:24,694 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) [2022-03-18 05:24:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 707 transitions. [2022-03-18 05:24:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:24:24,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:24,695 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:24,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-18 05:24:24,695 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-03-18 05:24:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:24,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [704512139] [2022-03-18 05:24:24,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 2 times [2022-03-18 05:24:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:24,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922211380] [2022-03-18 05:24:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:24,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:24,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922211380] [2022-03-18 05:24:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922211380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:24,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:24,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [704512139] [2022-03-18 05:24:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [704512139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:24,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406606193] [2022-03-18 05:24:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:24,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:24:24,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:24:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:24:24,997 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) [2022-03-18 05:24:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:28,502 INFO L93 Difference]: Finished difference Result 1245 states and 1510 transitions. [2022-03-18 05:24:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 05:24:28,502 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 [2022-03-18 05:24:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:28,505 INFO L225 Difference]: With dead ends: 1245 [2022-03-18 05:24:28,505 INFO L226 Difference]: Without dead ends: 1100 [2022-03-18 05:24:28,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 05:24:28,506 INFO L912 BasicCegarLoop]: 377 mSDtfsCounter, 2001 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:28,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1198 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 05:24:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-03-18 05:24:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 892. [2022-03-18 05:24:28,725 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) [2022-03-18 05:24:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1103 transitions. [2022-03-18 05:24:28,727 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1103 transitions. Word has length 73 [2022-03-18 05:24:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:28,727 INFO L478 AbstractCegarLoop]: Abstraction has 892 states and 1103 transitions. [2022-03-18 05:24:28,727 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) [2022-03-18 05:24:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1103 transitions. [2022-03-18 05:24:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:24:28,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:28,728 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:28,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-18 05:24:28,728 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-03-18 05:24:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:28,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043578118] [2022-03-18 05:24:28,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 2 times [2022-03-18 05:24:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:28,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170063132] [2022-03-18 05:24:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170063132] [2022-03-18 05:24:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170063132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:28,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:28,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043578118] [2022-03-18 05:24:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043578118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:28,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:28,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146601773] [2022-03-18 05:24:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:28,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:28,941 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) [2022-03-18 05:24:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:30,770 INFO L93 Difference]: Finished difference Result 1149 states and 1395 transitions. [2022-03-18 05:24:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 05:24:30,770 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 [2022-03-18 05:24:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:30,773 INFO L225 Difference]: With dead ends: 1149 [2022-03-18 05:24:30,773 INFO L226 Difference]: Without dead ends: 1044 [2022-03-18 05:24:30,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-03-18 05:24:30,774 INFO L912 BasicCegarLoop]: 624 mSDtfsCounter, 2826 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:30,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 1160 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 05:24:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-03-18 05:24:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 985. [2022-03-18 05:24:31,121 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) [2022-03-18 05:24:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1215 transitions. [2022-03-18 05:24:31,122 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1215 transitions. Word has length 73 [2022-03-18 05:24:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:31,122 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1215 transitions. [2022-03-18 05:24:31,123 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) [2022-03-18 05:24:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1215 transitions. [2022-03-18 05:24:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 05:24:31,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:31,124 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:31,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-18 05:24:31,124 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-03-18 05:24:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [952858684] [2022-03-18 05:24:31,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 2 times [2022-03-18 05:24:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438101382] [2022-03-18 05:24:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 05:24:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438101382] [2022-03-18 05:24:31,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438101382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:31,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:31,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:24:31,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:31,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [952858684] [2022-03-18 05:24:31,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [952858684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:31,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:31,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:24:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364976975] [2022-03-18 05:24:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:31,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:24:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:31,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:24:31,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:24:31,435 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) [2022-03-18 05:24:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:33,358 INFO L93 Difference]: Finished difference Result 1017 states and 1250 transitions. [2022-03-18 05:24:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:24:33,359 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 [2022-03-18 05:24:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:33,361 INFO L225 Difference]: With dead ends: 1017 [2022-03-18 05:24:33,361 INFO L226 Difference]: Without dead ends: 981 [2022-03-18 05:24:33,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:24:33,361 INFO L912 BasicCegarLoop]: 372 mSDtfsCounter, 565 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:33,361 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2184 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 05:24:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-18 05:24:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-03-18 05:24:33,628 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) [2022-03-18 05:24:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1209 transitions. [2022-03-18 05:24:33,629 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1209 transitions. Word has length 77 [2022-03-18 05:24:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:33,629 INFO L478 AbstractCegarLoop]: Abstraction has 981 states and 1209 transitions. [2022-03-18 05:24:33,629 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) [2022-03-18 05:24:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1209 transitions. [2022-03-18 05:24:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 05:24:33,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:33,631 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:33,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-18 05:24:33,631 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 1 times [2022-03-18 05:24:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442914547] [2022-03-18 05:24:33,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 2 times [2022-03-18 05:24:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902950519] [2022-03-18 05:24:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 05:24:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902950519] [2022-03-18 05:24:33,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902950519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:33,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:33,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:33,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442914547] [2022-03-18 05:24:33,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442914547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:33,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:33,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823820829] [2022-03-18 05:24:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:33,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:33,853 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) [2022-03-18 05:24:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:35,178 INFO L93 Difference]: Finished difference Result 1034 states and 1265 transitions. [2022-03-18 05:24:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:35,178 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 [2022-03-18 05:24:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:35,180 INFO L225 Difference]: With dead ends: 1034 [2022-03-18 05:24:35,181 INFO L226 Difference]: Without dead ends: 947 [2022-03-18 05:24:35,181 INFO L911 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 [2022-03-18 05:24:35,181 INFO L912 BasicCegarLoop]: 347 mSDtfsCounter, 520 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:35,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1099 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-18 05:24:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-03-18 05:24:35,436 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) [2022-03-18 05:24:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1157 transitions. [2022-03-18 05:24:35,437 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1157 transitions. Word has length 78 [2022-03-18 05:24:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:35,437 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1157 transitions. [2022-03-18 05:24:35,437 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) [2022-03-18 05:24:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1157 transitions. [2022-03-18 05:24:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 05:24:35,438 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:35,438 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:35,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-18 05:24:35,439 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-03-18 05:24:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892137015] [2022-03-18 05:24:35,439 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 2 times [2022-03-18 05:24:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853163413] [2022-03-18 05:24:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:24:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:35,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853163413] [2022-03-18 05:24:35,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853163413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:35,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:35,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:24:35,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892137015] [2022-03-18 05:24:35,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892137015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:35,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:35,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:24:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122236156] [2022-03-18 05:24:35,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:35,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:24:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:24:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:24:35,642 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) [2022-03-18 05:24:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:36,876 INFO L93 Difference]: Finished difference Result 976 states and 1185 transitions. [2022-03-18 05:24:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:36,880 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 [2022-03-18 05:24:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:36,882 INFO L225 Difference]: With dead ends: 976 [2022-03-18 05:24:36,882 INFO L226 Difference]: Without dead ends: 899 [2022-03-18 05:24:36,883 INFO L911 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 [2022-03-18 05:24:36,884 INFO L912 BasicCegarLoop]: 321 mSDtfsCounter, 203 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:36,893 INFO L913 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] [2022-03-18 05:24:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-03-18 05:24:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-03-18 05:24:37,124 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) [2022-03-18 05:24:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1095 transitions. [2022-03-18 05:24:37,126 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1095 transitions. Word has length 75 [2022-03-18 05:24:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:37,126 INFO L478 AbstractCegarLoop]: Abstraction has 899 states and 1095 transitions. [2022-03-18 05:24:37,127 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) [2022-03-18 05:24:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1095 transitions. [2022-03-18 05:24:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:24:37,128 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:37,128 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:37,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-18 05:24:37,129 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-03-18 05:24:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:37,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555509404] [2022-03-18 05:24:37,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 2 times [2022-03-18 05:24:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:37,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355852753] [2022-03-18 05:24:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 05:24:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 05:24:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:37,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355852753] [2022-03-18 05:24:37,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355852753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:37,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:37,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:37,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555509404] [2022-03-18 05:24:37,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555509404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:37,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:37,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864409807] [2022-03-18 05:24:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:37,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:37,305 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) [2022-03-18 05:24:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:38,197 INFO L93 Difference]: Finished difference Result 944 states and 1143 transitions. [2022-03-18 05:24:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:38,197 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 [2022-03-18 05:24:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:38,199 INFO L225 Difference]: With dead ends: 944 [2022-03-18 05:24:38,199 INFO L226 Difference]: Without dead ends: 883 [2022-03-18 05:24:38,199 INFO L911 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 [2022-03-18 05:24:38,200 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 307 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-03-18 05:24:38,200 INFO L913 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] [2022-03-18 05:24:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-18 05:24:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-03-18 05:24:38,411 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) [2022-03-18 05:24:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1071 transitions. [2022-03-18 05:24:38,412 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1071 transitions. Word has length 73 [2022-03-18 05:24:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:38,412 INFO L478 AbstractCegarLoop]: Abstraction has 883 states and 1071 transitions. [2022-03-18 05:24:38,412 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) [2022-03-18 05:24:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1071 transitions. [2022-03-18 05:24:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 05:24:38,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:38,415 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:38,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-18 05:24:38,415 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-03-18 05:24:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596731058] [2022-03-18 05:24:38,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 2 times [2022-03-18 05:24:38,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563080676] [2022-03-18 05:24:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 05:24:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 05:24:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:38,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563080676] [2022-03-18 05:24:38,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563080676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:38,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:38,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:38,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:38,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596731058] [2022-03-18 05:24:38,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596731058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:38,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:38,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180881351] [2022-03-18 05:24:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:38,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:38,668 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) [2022-03-18 05:24:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:39,619 INFO L93 Difference]: Finished difference Result 1161 states and 1426 transitions. [2022-03-18 05:24:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:24:39,619 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 [2022-03-18 05:24:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:39,621 INFO L225 Difference]: With dead ends: 1161 [2022-03-18 05:24:39,621 INFO L226 Difference]: Without dead ends: 869 [2022-03-18 05:24:39,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:39,622 INFO L912 BasicCegarLoop]: 297 mSDtfsCounter, 622 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:39,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 959 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-03-18 05:24:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-03-18 05:24:39,842 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) [2022-03-18 05:24:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1049 transitions. [2022-03-18 05:24:39,844 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1049 transitions. Word has length 77 [2022-03-18 05:24:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:39,844 INFO L478 AbstractCegarLoop]: Abstraction has 869 states and 1049 transitions. [2022-03-18 05:24:39,844 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) [2022-03-18 05:24:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1049 transitions. [2022-03-18 05:24:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 05:24:39,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:39,845 INFO L500 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] [2022-03-18 05:24:39,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-18 05:24:39,845 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-03-18 05:24:39,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:39,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226489313] [2022-03-18 05:24:39,846 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 2 times [2022-03-18 05:24:39,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:39,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683541866] [2022-03-18 05:24:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:39,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 05:24:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 05:24:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 05:24:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683541866] [2022-03-18 05:24:40,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683541866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:40,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:40,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:40,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226489313] [2022-03-18 05:24:40,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226489313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:40,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:40,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:40,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846631399] [2022-03-18 05:24:40,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:40,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:40,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:40,048 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) [2022-03-18 05:24:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:40,860 INFO L93 Difference]: Finished difference Result 914 states and 1097 transitions. [2022-03-18 05:24:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:40,860 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 [2022-03-18 05:24:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:40,862 INFO L225 Difference]: With dead ends: 914 [2022-03-18 05:24:40,862 INFO L226 Difference]: Without dead ends: 849 [2022-03-18 05:24:40,862 INFO L911 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 [2022-03-18 05:24:40,863 INFO L912 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:40,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 858 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:24:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-03-18 05:24:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-03-18 05:24:41,063 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) [2022-03-18 05:24:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1021 transitions. [2022-03-18 05:24:41,064 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1021 transitions. Word has length 75 [2022-03-18 05:24:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:41,064 INFO L478 AbstractCegarLoop]: Abstraction has 849 states and 1021 transitions. [2022-03-18 05:24:41,064 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) [2022-03-18 05:24:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1021 transitions. [2022-03-18 05:24:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 05:24:41,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:41,065 INFO L500 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] [2022-03-18 05:24:41,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-18 05:24:41,066 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-03-18 05:24:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:41,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617927387] [2022-03-18 05:24:41,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 2 times [2022-03-18 05:24:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:41,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803232256] [2022-03-18 05:24:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 05:24:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 05:24:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:41,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803232256] [2022-03-18 05:24:41,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803232256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 05:24:41,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120539947] [2022-03-18 05:24:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:24:41,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:24:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:24:41,229 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) [2022-03-18 05:24:41,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 05:24:41,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 05:24:41,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:24:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 05:24:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:24:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 05:24:41,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:24:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120539947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 05:24:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 13 [2022-03-18 05:24:41,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:41,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617927387] [2022-03-18 05:24:41,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617927387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:41,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:41,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:24:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006475039] [2022-03-18 05:24:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:41,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:24:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:24:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:41,555 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) [2022-03-18 05:24:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:41,887 INFO L93 Difference]: Finished difference Result 867 states and 1039 transitions. [2022-03-18 05:24:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:24:41,887 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 [2022-03-18 05:24:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:41,889 INFO L225 Difference]: With dead ends: 867 [2022-03-18 05:24:41,889 INFO L226 Difference]: Without dead ends: 788 [2022-03-18 05:24:41,889 INFO L911 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 [2022-03-18 05:24:41,889 INFO L912 BasicCegarLoop]: 299 mSDtfsCounter, 0 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:41,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1190 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:24:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-18 05:24:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-03-18 05:24:42,069 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) [2022-03-18 05:24:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 951 transitions. [2022-03-18 05:24:42,070 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 951 transitions. Word has length 77 [2022-03-18 05:24:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:42,070 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 951 transitions. [2022-03-18 05:24:42,070 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) [2022-03-18 05:24:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 951 transitions. [2022-03-18 05:24:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 05:24:42,072 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:42,072 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:42,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 05:24:42,278 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 [2022-03-18 05:24:42,279 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:42,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-03-18 05:24:42,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413109917] [2022-03-18 05:24:42,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 2 times [2022-03-18 05:24:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083205540] [2022-03-18 05:24:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 05:24:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 05:24:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:42,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:42,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083205540] [2022-03-18 05:24:42,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083205540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:42,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:42,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:42,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413109917] [2022-03-18 05:24:42,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413109917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:42,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:42,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941767358] [2022-03-18 05:24:42,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:42,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:42,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:42,502 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) [2022-03-18 05:24:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:43,331 INFO L93 Difference]: Finished difference Result 1066 states and 1306 transitions. [2022-03-18 05:24:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:43,331 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 [2022-03-18 05:24:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:43,333 INFO L225 Difference]: With dead ends: 1066 [2022-03-18 05:24:43,333 INFO L226 Difference]: Without dead ends: 788 [2022-03-18 05:24:43,333 INFO L911 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 [2022-03-18 05:24:43,334 INFO L912 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:43,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 659 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:24:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-18 05:24:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-03-18 05:24:43,572 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) [2022-03-18 05:24:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 949 transitions. [2022-03-18 05:24:43,573 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 949 transitions. Word has length 81 [2022-03-18 05:24:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:43,574 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 949 transitions. [2022-03-18 05:24:43,574 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) [2022-03-18 05:24:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 949 transitions. [2022-03-18 05:24:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 05:24:43,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:43,575 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:43,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-18 05:24:43,575 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:43,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-03-18 05:24:43,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:43,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [456715156] [2022-03-18 05:24:43,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 2 times [2022-03-18 05:24:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315856341] [2022-03-18 05:24:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:24:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315856341] [2022-03-18 05:24:43,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315856341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:43,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:43,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:43,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [456715156] [2022-03-18 05:24:43,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [456715156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:43,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:43,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792706029] [2022-03-18 05:24:43,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:43,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 05:24:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 05:24:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:43,853 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) [2022-03-18 05:24:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:45,862 INFO L93 Difference]: Finished difference Result 833 states and 994 transitions. [2022-03-18 05:24:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 05:24:45,863 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 [2022-03-18 05:24:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:45,864 INFO L225 Difference]: With dead ends: 833 [2022-03-18 05:24:45,864 INFO L226 Difference]: Without dead ends: 700 [2022-03-18 05:24:45,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 05:24:45,864 INFO L912 BasicCegarLoop]: 425 mSDtfsCounter, 1203 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:45,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1571 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 05:24:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-18 05:24:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 359. [2022-03-18 05:24:45,978 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) [2022-03-18 05:24:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2022-03-18 05:24:45,979 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 78 [2022-03-18 05:24:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:45,979 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2022-03-18 05:24:45,979 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) [2022-03-18 05:24:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2022-03-18 05:24:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 05:24:45,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:45,980 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:45,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-18 05:24:45,980 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-03-18 05:24:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296269735] [2022-03-18 05:24:45,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 2 times [2022-03-18 05:24:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:45,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475145108] [2022-03-18 05:24:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475145108] [2022-03-18 05:24:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475145108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:46,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:24:46,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296269735] [2022-03-18 05:24:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296269735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:46,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:24:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714945761] [2022-03-18 05:24:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:46,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:24:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:24:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:24:46,263 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) [2022-03-18 05:24:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:47,216 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2022-03-18 05:24:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:47,216 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 [2022-03-18 05:24:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:47,217 INFO L225 Difference]: With dead ends: 361 [2022-03-18 05:24:47,217 INFO L226 Difference]: Without dead ends: 282 [2022-03-18 05:24:47,217 INFO L911 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 [2022-03-18 05:24:47,217 INFO L912 BasicCegarLoop]: 219 mSDtfsCounter, 285 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:47,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1561 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-18 05:24:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-03-18 05:24:47,303 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) [2022-03-18 05:24:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 342 transitions. [2022-03-18 05:24:47,303 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 342 transitions. Word has length 79 [2022-03-18 05:24:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:47,303 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 342 transitions. [2022-03-18 05:24:47,303 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) [2022-03-18 05:24:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 342 transitions. [2022-03-18 05:24:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 05:24:47,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:47,304 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:47,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-18 05:24:47,304 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-03-18 05:24:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1102530737] [2022-03-18 05:24:47,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 2 times [2022-03-18 05:24:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252236519] [2022-03-18 05:24:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 05:24:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252236519] [2022-03-18 05:24:47,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252236519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:47,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:47,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:47,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1102530737] [2022-03-18 05:24:47,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1102530737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:47,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:47,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480452287] [2022-03-18 05:24:47,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:47,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:47,486 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) [2022-03-18 05:24:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:48,107 INFO L93 Difference]: Finished difference Result 365 states and 428 transitions. [2022-03-18 05:24:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 05:24:48,107 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 [2022-03-18 05:24:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:48,108 INFO L225 Difference]: With dead ends: 365 [2022-03-18 05:24:48,108 INFO L226 Difference]: Without dead ends: 279 [2022-03-18 05:24:48,108 INFO L911 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 [2022-03-18 05:24:48,109 INFO L912 BasicCegarLoop]: 205 mSDtfsCounter, 215 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:48,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 736 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:24:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-18 05:24:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 235. [2022-03-18 05:24:48,168 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) [2022-03-18 05:24:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 267 transitions. [2022-03-18 05:24:48,168 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 267 transitions. Word has length 83 [2022-03-18 05:24:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:48,169 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 267 transitions. [2022-03-18 05:24:48,169 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) [2022-03-18 05:24:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 267 transitions. [2022-03-18 05:24:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 05:24:48,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:48,169 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:48,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-18 05:24:48,169 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-03-18 05:24:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [181005772] [2022-03-18 05:24:48,170 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 2 times [2022-03-18 05:24:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389697928] [2022-03-18 05:24:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-18 05:24:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389697928] [2022-03-18 05:24:48,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389697928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:48,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:48,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:48,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [181005772] [2022-03-18 05:24:48,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [181005772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:48,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:48,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103892686] [2022-03-18 05:24:48,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:48,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 05:24:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 05:24:48,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:48,496 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) [2022-03-18 05:24:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:49,193 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-03-18 05:24:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:24:49,193 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 [2022-03-18 05:24:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:49,194 INFO L225 Difference]: With dead ends: 287 [2022-03-18 05:24:49,194 INFO L226 Difference]: Without dead ends: 255 [2022-03-18 05:24:49,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:24:49,194 INFO L912 BasicCegarLoop]: 156 mSDtfsCounter, 435 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:49,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1000 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:24:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-18 05:24:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2022-03-18 05:24:49,255 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) [2022-03-18 05:24:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-03-18 05:24:49,256 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 99 [2022-03-18 05:24:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:49,256 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-03-18 05:24:49,256 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) [2022-03-18 05:24:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-03-18 05:24:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 05:24:49,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:49,257 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:49,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-18 05:24:49,257 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-03-18 05:24:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301658333] [2022-03-18 05:24:49,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 2 times [2022-03-18 05:24:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696884060] [2022-03-18 05:24:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-18 05:24:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:49,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696884060] [2022-03-18 05:24:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696884060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:49,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:49,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301658333] [2022-03-18 05:24:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301658333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:24:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521656171] [2022-03-18 05:24:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:49,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:24:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:24:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:24:49,528 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) [2022-03-18 05:24:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:51,085 INFO L93 Difference]: Finished difference Result 508 states and 570 transitions. [2022-03-18 05:24:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 05:24:51,085 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 [2022-03-18 05:24:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:51,086 INFO L225 Difference]: With dead ends: 508 [2022-03-18 05:24:51,086 INFO L226 Difference]: Without dead ends: 399 [2022-03-18 05:24:51,087 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 05:24:51,087 INFO L912 BasicCegarLoop]: 252 mSDtfsCounter, 929 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:51,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 976 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-18 05:24:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 349. [2022-03-18 05:24:51,179 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) [2022-03-18 05:24:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2022-03-18 05:24:51,179 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 101 [2022-03-18 05:24:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:51,180 INFO L478 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2022-03-18 05:24:51,180 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) [2022-03-18 05:24:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2022-03-18 05:24:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 05:24:51,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:51,181 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:51,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-18 05:24:51,181 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-03-18 05:24:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815070687] [2022-03-18 05:24:51,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 2 times [2022-03-18 05:24:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190191369] [2022-03-18 05:24:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-18 05:24:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190191369] [2022-03-18 05:24:51,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190191369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:51,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:51,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:24:51,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:51,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815070687] [2022-03-18 05:24:51,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815070687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:51,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:51,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:24:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647084930] [2022-03-18 05:24:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:51,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 05:24:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 05:24:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-18 05:24:51,468 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) [2022-03-18 05:24:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:52,031 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2022-03-18 05:24:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:52,032 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 [2022-03-18 05:24:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:52,032 INFO L225 Difference]: With dead ends: 367 [2022-03-18 05:24:52,032 INFO L226 Difference]: Without dead ends: 261 [2022-03-18 05:24:52,033 INFO L911 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 [2022-03-18 05:24:52,033 INFO L912 BasicCegarLoop]: 160 mSDtfsCounter, 105 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:52,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 947 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:24:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-18 05:24:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 146. [2022-03-18 05:24:52,075 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) [2022-03-18 05:24:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-03-18 05:24:52,075 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 101 [2022-03-18 05:24:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:52,075 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-03-18 05:24:52,075 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) [2022-03-18 05:24:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-03-18 05:24:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 05:24:52,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:52,076 INFO L500 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] [2022-03-18 05:24:52,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-18 05:24:52,076 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 1 times [2022-03-18 05:24:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552588871] [2022-03-18 05:24:52,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 2 times [2022-03-18 05:24:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196292458] [2022-03-18 05:24:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-18 05:24:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 05:24:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 05:24:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196292458] [2022-03-18 05:24:52,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196292458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:52,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552588871] [2022-03-18 05:24:52,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552588871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:52,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371634178] [2022-03-18 05:24:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:52,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:52,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:52,283 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) [2022-03-18 05:24:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:52,595 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-03-18 05:24:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:24:52,596 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 [2022-03-18 05:24:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:52,596 INFO L225 Difference]: With dead ends: 192 [2022-03-18 05:24:52,596 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 05:24:52,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:52,597 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 117 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-18 05:24:52,597 INFO L913 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] [2022-03-18 05:24:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 05:24:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-03-18 05:24:52,651 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) [2022-03-18 05:24:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-03-18 05:24:52,651 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 116 [2022-03-18 05:24:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:52,651 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-03-18 05:24:52,651 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) [2022-03-18 05:24:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-03-18 05:24:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 05:24:52,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:52,652 INFO L500 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] [2022-03-18 05:24:52,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-18 05:24:52,652 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-03-18 05:24:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2059957266] [2022-03-18 05:24:52,653 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 2 times [2022-03-18 05:24:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489858815] [2022-03-18 05:24:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:52,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-18 05:24:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 05:24:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 05:24:52,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489858815] [2022-03-18 05:24:52,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489858815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:52,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2059957266] [2022-03-18 05:24:52,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2059957266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 05:24:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650921250] [2022-03-18 05:24:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:52,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 05:24:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 05:24:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:52,930 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) [2022-03-18 05:24:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:53,778 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-03-18 05:24:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 05:24:53,778 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 [2022-03-18 05:24:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:53,779 INFO L225 Difference]: With dead ends: 292 [2022-03-18 05:24:53,779 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 05:24:53,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 05:24:53,780 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 436 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:53,780 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 388 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:24:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 05:24:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-18 05:24:53,827 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) [2022-03-18 05:24:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-03-18 05:24:53,828 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-03-18 05:24:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:53,828 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-03-18 05:24:53,828 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) [2022-03-18 05:24:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-03-18 05:24:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 05:24:53,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:53,829 INFO L500 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] [2022-03-18 05:24:53,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-18 05:24:53,829 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-03-18 05:24:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1344096359] [2022-03-18 05:24:53,830 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 2 times [2022-03-18 05:24:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557179631] [2022-03-18 05:24:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:53,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:53,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:53,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 05:24:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:24:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-18 05:24:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 05:24:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 05:24:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:54,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557179631] [2022-03-18 05:24:54,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557179631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:54,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:54,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:24:54,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1344096359] [2022-03-18 05:24:54,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1344096359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:54,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:54,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:24:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282587805] [2022-03-18 05:24:54,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:54,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:24:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:24:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:24:54,170 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) [2022-03-18 05:24:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:54,882 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-03-18 05:24:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:24:54,883 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 [2022-03-18 05:24:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:54,883 INFO L225 Difference]: With dead ends: 152 [2022-03-18 05:24:54,883 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 05:24:54,884 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-03-18 05:24:54,884 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 240 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-18 05:24:54,884 INFO L913 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] [2022-03-18 05:24:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 05:24:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 05:24:54,884 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) [2022-03-18 05:24:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 05:24:54,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-18 05:24:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:54,885 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 05:24:54,885 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) [2022-03-18 05:24:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 05:24:54,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 05:24:54,887 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 05:24:54,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-18 05:24:54,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.