/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 02:27:12,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 02:27:12,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 02:27:13,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 02:27:13,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 02:27:13,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 02:27:13,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 02:27:13,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 02:27:13,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 02:27:13,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 02:27:13,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 02:27:13,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 02:27:13,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 02:27:13,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 02:27:13,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 02:27:13,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 02:27:13,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 02:27:13,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 02:27:13,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 02:27:13,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 02:27:13,046 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 02:27:13,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 02:27:13,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 02:27:13,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 02:27:13,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 02:27:13,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 02:27:13,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 02:27:13,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 02:27:13,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 02:27:13,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 02:27:13,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 02:27:13,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 02:27:13,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 02:27:13,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 02:27:13,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 02:27:13,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 02:27:13,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 02:27:13,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 02:27:13,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 02:27:13,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 02:27:13,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 02:27:13,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 02:27:13,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 02:27:13,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 02:27:13,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 02:27:13,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 02:27:13,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 02:27:13,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 02:27:13,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 02:27:13,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 02:27:13,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 02:27:13,102 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 02:27:13,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 02:27:13,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 02:27:13,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 02:27:13,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 02:27:13,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:27:13,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 02:27:13,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 02:27:13,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 02:27:13,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 02:27:13,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 02:27:13,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 02:27:13,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 02:27:13,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 02:27:13,374 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 02:27:13,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-03-20 02:27:13,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff73065/eb6514b2a40243deae7557ad47f57a3c/FLAG4d86254d7 [2022-03-20 02:27:13,881 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 02:27:13,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-03-20 02:27:13,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff73065/eb6514b2a40243deae7557ad47f57a3c/FLAG4d86254d7 [2022-03-20 02:27:14,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff73065/eb6514b2a40243deae7557ad47f57a3c [2022-03-20 02:27:14,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 02:27:14,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 02:27:14,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 02:27:14,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 02:27:14,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 02:27:14,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353feea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14, skipping insertion in model container [2022-03-20 02:27:14,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 02:27:14,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 02:27:14,527 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] [2022-03-20 02:27:14,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:27:14,751 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 02:27:14,761 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] [2022-03-20 02:27:14,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:27:14,858 INFO L208 MainTranslator]: Completed translation [2022-03-20 02:27:14,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14 WrapperNode [2022-03-20 02:27:14,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 02:27:14,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 02:27:14,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 02:27:14,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 02:27:14,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:14,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 02:27:14,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 02:27:14,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 02:27:14,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 02:27:14,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (1/1) ... [2022-03-20 02:27:15,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:27:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:27:15,035 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) [2022-03-20 02:27:15,061 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 [2022-03-20 02:27:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 02:27:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 02:27:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 02:27:15,090 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-20 02:27:15,090 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-03-20 02:27:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-20 02:27:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-20 02:27:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-20 02:27:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-20 02:27:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-03-20 02:27:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-03-20 02:27:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-20 02:27:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-20 02:27:15,095 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 02:27:15,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 02:27:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 02:27:15,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 02:27:15,338 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 02:27:15,339 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 02:27:15,494 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,584 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-03-20 02:27:15,584 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-03-20 02:27:15,588 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,611 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-03-20 02:27:15,611 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-03-20 02:27:15,626 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,636 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-20 02:27:15,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-20 02:27:15,678 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,709 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-03-20 02:27:15,710 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-03-20 02:27:15,710 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-03-20 02:27:15,716 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,920 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-03-20 02:27:15,920 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-03-20 02:27:15,921 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:15,964 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-20 02:27:15,964 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-20 02:27:16,002 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:16,013 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-03-20 02:27:16,013 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-03-20 02:27:16,016 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:16,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-03-20 02:27:16,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-03-20 02:27:16,152 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 02:27:16,155 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 02:27:16,155 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 02:27:16,170 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 02:27:16,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 02:27:16,191 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 02:27:16,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:27:16 BoogieIcfgContainer [2022-03-20 02:27:16,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 02:27:16,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 02:27:16,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 02:27:16,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 02:27:16,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:27:14" (1/3) ... [2022-03-20 02:27:16,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ee17df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:27:16, skipping insertion in model container [2022-03-20 02:27:16,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:27:14" (2/3) ... [2022-03-20 02:27:16,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ee17df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:27:16, skipping insertion in model container [2022-03-20 02:27:16,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:27:16" (3/3) ... [2022-03-20 02:27:16,202 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-03-20 02:27:16,209 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 02:27:16,209 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 02:27:16,255 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 02:27:16,261 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-20 02:27:16,262 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 02:27:16,294 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) [2022-03-20 02:27:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 02:27:16,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:16,300 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:16,300 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-03-20 02:27:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150460283] [2022-03-20 02:27:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:16,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:16,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150460283] [2022-03-20 02:27:16,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150460283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:16,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:16,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:27:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165378029] [2022-03-20 02:27:16,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:16,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:27:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:27:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:27:16,729 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) [2022-03-20 02:27:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:18,641 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-03-20 02:27:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:27:18,643 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 [2022-03-20 02:27:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:18,655 INFO L225 Difference]: With dead ends: 1043 [2022-03-20 02:27:18,655 INFO L226 Difference]: Without dead ends: 663 [2022-03-20 02:27:18,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:18,663 INFO L913 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:18,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 02:27:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-20 02:27:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-03-20 02:27:18,772 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) [2022-03-20 02:27:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-03-20 02:27:18,776 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-03-20 02:27:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:18,777 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-03-20 02:27:18,777 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) [2022-03-20 02:27:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-03-20 02:27:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 02:27:18,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:18,778 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:18,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 02:27:18,778 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:18,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-03-20 02:27:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:18,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158727270] [2022-03-20 02:27:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:18,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:18,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158727270] [2022-03-20 02:27:18,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158727270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:18,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:18,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:27:18,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808379395] [2022-03-20 02:27:18,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:18,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:27:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:27:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:18,951 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) [2022-03-20 02:27:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:20,567 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-03-20 02:27:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:27:20,568 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 [2022-03-20 02:27:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:20,573 INFO L225 Difference]: With dead ends: 961 [2022-03-20 02:27:20,574 INFO L226 Difference]: Without dead ends: 842 [2022-03-20 02:27:20,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:20,576 INFO L913 BasicCegarLoop]: 833 mSDtfsCounter, 1495 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:20,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1000 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 02:27:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-20 02:27:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-03-20 02:27:20,616 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) [2022-03-20 02:27:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-03-20 02:27:20,619 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-03-20 02:27:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:20,620 INFO L478 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-03-20 02:27:20,620 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) [2022-03-20 02:27:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-03-20 02:27:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 02:27:20,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:20,621 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:20,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 02:27:20,622 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:20,622 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-03-20 02:27:20,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:20,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036779941] [2022-03-20 02:27:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:20,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036779941] [2022-03-20 02:27:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036779941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:20,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:20,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:27:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359674633] [2022-03-20 02:27:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:20,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:27:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:27:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:20,764 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) [2022-03-20 02:27:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:22,142 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-03-20 02:27:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:27:22,142 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 [2022-03-20 02:27:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:22,147 INFO L225 Difference]: With dead ends: 1142 [2022-03-20 02:27:22,147 INFO L226 Difference]: Without dead ends: 966 [2022-03-20 02:27:22,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:22,149 INFO L913 BasicCegarLoop]: 722 mSDtfsCounter, 1919 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:22,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1929 Valid, 860 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:27:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-03-20 02:27:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-03-20 02:27:22,185 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) [2022-03-20 02:27:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-03-20 02:27:22,189 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-03-20 02:27:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:22,189 INFO L478 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-03-20 02:27:22,189 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) [2022-03-20 02:27:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-03-20 02:27:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 02:27:22,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:22,191 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:22,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 02:27:22,191 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-03-20 02:27:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522063098] [2022-03-20 02:27:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:22,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:22,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522063098] [2022-03-20 02:27:22,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522063098] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:22,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:22,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:27:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355311438] [2022-03-20 02:27:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:22,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:27:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:27:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:22,304 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) [2022-03-20 02:27:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:24,960 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-03-20 02:27:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:27:24,961 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 [2022-03-20 02:27:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:24,968 INFO L225 Difference]: With dead ends: 1624 [2022-03-20 02:27:24,968 INFO L226 Difference]: Without dead ends: 1340 [2022-03-20 02:27:24,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:24,971 INFO L913 BasicCegarLoop]: 1003 mSDtfsCounter, 1092 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:24,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 1278 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 02:27:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-03-20 02:27:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-03-20 02:27:25,025 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) [2022-03-20 02:27:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-03-20 02:27:25,029 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-03-20 02:27:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:25,030 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-03-20 02:27:25,030 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) [2022-03-20 02:27:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-03-20 02:27:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 02:27:25,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:25,031 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:25,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 02:27:25,032 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-03-20 02:27:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:25,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924387834] [2022-03-20 02:27:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:25,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:25,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:25,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:25,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924387834] [2022-03-20 02:27:25,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924387834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:25,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:25,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 02:27:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986761892] [2022-03-20 02:27:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:25,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:27:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:27:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 02:27:25,252 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) [2022-03-20 02:27:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:27,297 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-03-20 02:27:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:27:27,298 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 [2022-03-20 02:27:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:27,305 INFO L225 Difference]: With dead ends: 1626 [2022-03-20 02:27:27,305 INFO L226 Difference]: Without dead ends: 1042 [2022-03-20 02:27:27,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:27:27,313 INFO L913 BasicCegarLoop]: 737 mSDtfsCounter, 2111 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:27,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2117 Valid, 996 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 02:27:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-03-20 02:27:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-03-20 02:27:27,385 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) [2022-03-20 02:27:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-03-20 02:27:27,390 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-03-20 02:27:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:27,392 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-03-20 02:27:27,393 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) [2022-03-20 02:27:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-03-20 02:27:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 02:27:27,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:27,397 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:27,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 02:27:27,397 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-03-20 02:27:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972999334] [2022-03-20 02:27:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:27,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972999334] [2022-03-20 02:27:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972999334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:27:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321678143] [2022-03-20 02:27:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:27,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:27:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:27:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:27,570 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) [2022-03-20 02:27:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:29,580 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-03-20 02:27:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:27:29,581 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 [2022-03-20 02:27:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:29,585 INFO L225 Difference]: With dead ends: 963 [2022-03-20 02:27:29,585 INFO L226 Difference]: Without dead ends: 959 [2022-03-20 02:27:29,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:27:29,586 INFO L913 BasicCegarLoop]: 710 mSDtfsCounter, 407 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:29,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 975 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:27:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-20 02:27:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-03-20 02:27:29,643 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) [2022-03-20 02:27:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-03-20 02:27:29,647 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-03-20 02:27:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:29,647 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-03-20 02:27:29,647 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) [2022-03-20 02:27:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-03-20 02:27:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 02:27:29,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:29,649 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:29,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 02:27:29,649 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-03-20 02:27:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:29,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297284085] [2022-03-20 02:27:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:29,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:29,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297284085] [2022-03-20 02:27:29,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297284085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:29,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:29,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 02:27:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334882158] [2022-03-20 02:27:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:29,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:27:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:27:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:27:29,788 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) [2022-03-20 02:27:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:32,048 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-03-20 02:27:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:27:32,048 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 [2022-03-20 02:27:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:32,053 INFO L225 Difference]: With dead ends: 1409 [2022-03-20 02:27:32,053 INFO L226 Difference]: Without dead ends: 993 [2022-03-20 02:27:32,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:27:32,055 INFO L913 BasicCegarLoop]: 812 mSDtfsCounter, 744 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:32,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1266 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:27:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-03-20 02:27:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-03-20 02:27:32,118 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) [2022-03-20 02:27:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-03-20 02:27:32,121 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-03-20 02:27:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:32,122 INFO L478 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-03-20 02:27:32,122 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) [2022-03-20 02:27:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-03-20 02:27:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 02:27:32,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:32,124 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:32,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 02:27:32,124 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-03-20 02:27:32,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:32,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205623316] [2022-03-20 02:27:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:32,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:32,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:32,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205623316] [2022-03-20 02:27:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205623316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:32,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:32,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:27:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547448892] [2022-03-20 02:27:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:32,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:27:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:27:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:27:32,291 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) [2022-03-20 02:27:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:33,844 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-03-20 02:27:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:27:33,844 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 [2022-03-20 02:27:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:33,849 INFO L225 Difference]: With dead ends: 975 [2022-03-20 02:27:33,850 INFO L226 Difference]: Without dead ends: 957 [2022-03-20 02:27:33,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:33,852 INFO L913 BasicCegarLoop]: 669 mSDtfsCounter, 1139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:33,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 749 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 02:27:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-20 02:27:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-03-20 02:27:33,918 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) [2022-03-20 02:27:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-03-20 02:27:33,921 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-03-20 02:27:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:33,923 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-03-20 02:27:33,923 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) [2022-03-20 02:27:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-03-20 02:27:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 02:27:33,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:33,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:33,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 02:27:33,928 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-03-20 02:27:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168873923] [2022-03-20 02:27:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:34,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:34,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:34,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 02:27:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:34,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:34,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168873923] [2022-03-20 02:27:34,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168873923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:34,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:34,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 02:27:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273074114] [2022-03-20 02:27:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:34,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:27:34,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:27:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:27:34,071 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) [2022-03-20 02:27:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:35,896 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-03-20 02:27:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:27:35,896 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 [2022-03-20 02:27:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:35,901 INFO L225 Difference]: With dead ends: 1159 [2022-03-20 02:27:35,901 INFO L226 Difference]: Without dead ends: 934 [2022-03-20 02:27:35,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 02:27:35,908 INFO L913 BasicCegarLoop]: 788 mSDtfsCounter, 580 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:35,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 1312 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 02:27:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-20 02:27:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-03-20 02:27:35,965 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) [2022-03-20 02:27:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-03-20 02:27:35,969 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-03-20 02:27:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:35,969 INFO L478 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-03-20 02:27:35,969 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) [2022-03-20 02:27:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-03-20 02:27:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 02:27:35,971 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:35,971 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:35,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 02:27:35,972 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-03-20 02:27:35,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:35,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944314916] [2022-03-20 02:27:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:35,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:36,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 02:27:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:36,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:36,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944314916] [2022-03-20 02:27:36,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944314916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:36,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:36,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 02:27:36,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806060273] [2022-03-20 02:27:36,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:36,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:27:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:27:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:27:36,107 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) [2022-03-20 02:27:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:37,300 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-03-20 02:27:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:27:37,301 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 [2022-03-20 02:27:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:37,304 INFO L225 Difference]: With dead ends: 956 [2022-03-20 02:27:37,304 INFO L226 Difference]: Without dead ends: 889 [2022-03-20 02:27:37,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:27:37,306 INFO L913 BasicCegarLoop]: 664 mSDtfsCounter, 1894 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:37,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 1110 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 02:27:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-20 02:27:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-03-20 02:27:37,370 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) [2022-03-20 02:27:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-03-20 02:27:37,372 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-03-20 02:27:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:37,372 INFO L478 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-03-20 02:27:37,372 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) [2022-03-20 02:27:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-03-20 02:27:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 02:27:37,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:37,375 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:37,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 02:27:37,376 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-03-20 02:27:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:37,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572870561] [2022-03-20 02:27:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:37,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:37,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572870561] [2022-03-20 02:27:37,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572870561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:37,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:37,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 02:27:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114208020] [2022-03-20 02:27:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:37,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 02:27:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 02:27:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:27:37,576 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) [2022-03-20 02:27:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:39,845 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-03-20 02:27:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:27:39,845 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 [2022-03-20 02:27:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:39,851 INFO L225 Difference]: With dead ends: 1059 [2022-03-20 02:27:39,851 INFO L226 Difference]: Without dead ends: 998 [2022-03-20 02:27:39,852 INFO L912 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 [2022-03-20 02:27:39,854 INFO L913 BasicCegarLoop]: 737 mSDtfsCounter, 2198 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:39,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 1659 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:27:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-03-20 02:27:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-03-20 02:27:39,923 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) [2022-03-20 02:27:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-03-20 02:27:39,925 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-03-20 02:27:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:39,926 INFO L478 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-03-20 02:27:39,926 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) [2022-03-20 02:27:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-03-20 02:27:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 02:27:39,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:39,928 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:39,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 02:27:39,929 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-03-20 02:27:39,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:39,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125978574] [2022-03-20 02:27:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:40,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125978574] [2022-03-20 02:27:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125978574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:40,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 02:27:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528958097] [2022-03-20 02:27:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:40,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 02:27:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 02:27:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:27:40,067 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) [2022-03-20 02:27:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:41,445 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-03-20 02:27:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:27:41,446 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 [2022-03-20 02:27:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:41,450 INFO L225 Difference]: With dead ends: 1094 [2022-03-20 02:27:41,450 INFO L226 Difference]: Without dead ends: 1083 [2022-03-20 02:27:41,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:41,451 INFO L913 BasicCegarLoop]: 806 mSDtfsCounter, 1257 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:41,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 1367 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:27:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-03-20 02:27:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-03-20 02:27:41,523 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) [2022-03-20 02:27:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-03-20 02:27:41,526 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-03-20 02:27:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:41,526 INFO L478 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-03-20 02:27:41,526 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) [2022-03-20 02:27:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-03-20 02:27:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 02:27:41,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:41,529 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:41,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 02:27:41,529 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-03-20 02:27:41,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:41,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604471876] [2022-03-20 02:27:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:41,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604471876] [2022-03-20 02:27:41,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604471876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:41,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:41,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:27:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560368684] [2022-03-20 02:27:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:41,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:27:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:27:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:27:41,753 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) [2022-03-20 02:27:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:43,504 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-03-20 02:27:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:27:43,505 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 [2022-03-20 02:27:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:43,524 INFO L225 Difference]: With dead ends: 1020 [2022-03-20 02:27:43,524 INFO L226 Difference]: Without dead ends: 957 [2022-03-20 02:27:43,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:27:43,526 INFO L913 BasicCegarLoop]: 649 mSDtfsCounter, 2588 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:43,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2597 Valid, 1496 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 02:27:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-20 02:27:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-03-20 02:27:43,588 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) [2022-03-20 02:27:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-03-20 02:27:43,590 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-03-20 02:27:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:43,591 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-03-20 02:27:43,591 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) [2022-03-20 02:27:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-03-20 02:27:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 02:27:43,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:43,606 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:43,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 02:27:43,606 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-03-20 02:27:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198980115] [2022-03-20 02:27:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:27:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:43,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198980115] [2022-03-20 02:27:43,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198980115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:43,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 02:27:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661549683] [2022-03-20 02:27:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:43,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:27:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:27:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-20 02:27:43,799 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) [2022-03-20 02:27:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:45,361 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-03-20 02:27:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:27:45,362 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 [2022-03-20 02:27:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:45,367 INFO L225 Difference]: With dead ends: 982 [2022-03-20 02:27:45,367 INFO L226 Difference]: Without dead ends: 977 [2022-03-20 02:27:45,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:27:45,368 INFO L913 BasicCegarLoop]: 691 mSDtfsCounter, 1534 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:45,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1380 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 02:27:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-03-20 02:27:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-03-20 02:27:45,477 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) [2022-03-20 02:27:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-03-20 02:27:45,479 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-03-20 02:27:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:45,479 INFO L478 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-03-20 02:27:45,480 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) [2022-03-20 02:27:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-03-20 02:27:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 02:27:45,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:45,482 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:45,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 02:27:45,482 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-03-20 02:27:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914321543] [2022-03-20 02:27:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:45,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:27:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 02:27:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914321543] [2022-03-20 02:27:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914321543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:45,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:45,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 02:27:45,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035225503] [2022-03-20 02:27:45,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:45,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:27:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:27:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:27:45,660 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) [2022-03-20 02:27:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:47,333 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-03-20 02:27:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:27:47,334 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 [2022-03-20 02:27:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:47,337 INFO L225 Difference]: With dead ends: 1188 [2022-03-20 02:27:47,337 INFO L226 Difference]: Without dead ends: 947 [2022-03-20 02:27:47,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:27:47,341 INFO L913 BasicCegarLoop]: 638 mSDtfsCounter, 1398 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:47,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1431 Valid, 1164 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 02:27:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-20 02:27:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-03-20 02:27:47,413 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) [2022-03-20 02:27:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-03-20 02:27:47,415 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-03-20 02:27:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:47,415 INFO L478 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-03-20 02:27:47,415 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) [2022-03-20 02:27:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-03-20 02:27:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 02:27:47,417 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:47,417 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:47,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 02:27:47,417 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-03-20 02:27:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:47,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271098714] [2022-03-20 02:27:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:47,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:47,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271098714] [2022-03-20 02:27:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271098714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:47,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:47,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:27:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217332554] [2022-03-20 02:27:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:47,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:27:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:27:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:27:47,601 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) [2022-03-20 02:27:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:49,729 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-03-20 02:27:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 02:27:49,729 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 [2022-03-20 02:27:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:49,732 INFO L225 Difference]: With dead ends: 962 [2022-03-20 02:27:49,732 INFO L226 Difference]: Without dead ends: 958 [2022-03-20 02:27:49,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:27:49,733 INFO L913 BasicCegarLoop]: 703 mSDtfsCounter, 735 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 4185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:49,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2357 Invalid, 4185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:27:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-20 02:27:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-03-20 02:27:49,786 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) [2022-03-20 02:27:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-03-20 02:27:49,788 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-03-20 02:27:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:49,788 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-03-20 02:27:49,789 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) [2022-03-20 02:27:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-03-20 02:27:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 02:27:49,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:49,790 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:49,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 02:27:49,790 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-03-20 02:27:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:49,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920507181] [2022-03-20 02:27:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:49,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:49,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920507181] [2022-03-20 02:27:49,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920507181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:49,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:49,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:27:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306880277] [2022-03-20 02:27:49,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:49,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:27:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:27:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:27:49,939 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) [2022-03-20 02:27:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:52,223 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-03-20 02:27:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:27:52,223 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 [2022-03-20 02:27:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:52,227 INFO L225 Difference]: With dead ends: 977 [2022-03-20 02:27:52,227 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 02:27:52,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:27:52,231 INFO L913 BasicCegarLoop]: 705 mSDtfsCounter, 722 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 4249 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 4523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 4249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:52,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 2457 Invalid, 4523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 4249 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:27:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 02:27:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-03-20 02:27:52,288 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) [2022-03-20 02:27:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-03-20 02:27:52,289 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-03-20 02:27:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:52,289 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-03-20 02:27:52,290 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) [2022-03-20 02:27:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-03-20 02:27:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 02:27:52,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:52,291 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:52,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 02:27:52,292 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-03-20 02:27:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599157068] [2022-03-20 02:27:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:27:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:52,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:52,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599157068] [2022-03-20 02:27:52,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599157068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:52,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:52,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:27:52,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133097527] [2022-03-20 02:27:52,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:52,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:27:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:52,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:27:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:27:52,533 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) [2022-03-20 02:27:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:54,949 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-03-20 02:27:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:27:54,950 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 [2022-03-20 02:27:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:54,953 INFO L225 Difference]: With dead ends: 963 [2022-03-20 02:27:54,953 INFO L226 Difference]: Without dead ends: 957 [2022-03-20 02:27:54,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:27:54,954 INFO L913 BasicCegarLoop]: 653 mSDtfsCounter, 2622 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:54,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2648 Valid, 1335 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:27:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-20 02:27:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-03-20 02:27:55,074 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) [2022-03-20 02:27:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-03-20 02:27:55,076 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-03-20 02:27:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:55,076 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-03-20 02:27:55,076 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) [2022-03-20 02:27:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-03-20 02:27:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 02:27:55,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:55,078 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:55,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 02:27:55,078 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-03-20 02:27:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326522728] [2022-03-20 02:27:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:27:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326522728] [2022-03-20 02:27:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326522728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:55,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:55,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 02:27:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190410455] [2022-03-20 02:27:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:55,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:27:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:27:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 02:27:55,228 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) [2022-03-20 02:27:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:27:57,908 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-03-20 02:27:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:27:57,908 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 [2022-03-20 02:27:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:27:57,914 INFO L225 Difference]: With dead ends: 967 [2022-03-20 02:27:57,914 INFO L226 Difference]: Without dead ends: 931 [2022-03-20 02:27:57,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:27:57,915 INFO L913 BasicCegarLoop]: 656 mSDtfsCounter, 1207 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:27:57,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 1297 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2751 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 02:27:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-03-20 02:27:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-03-20 02:27:58,011 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) [2022-03-20 02:27:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-03-20 02:27:58,013 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-03-20 02:27:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:27:58,013 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-03-20 02:27:58,013 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) [2022-03-20 02:27:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-03-20 02:27:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 02:27:58,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:27:58,016 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:27:58,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 02:27:58,016 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:27:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:27:58,016 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-03-20 02:27:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:27:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927372374] [2022-03-20 02:27:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:27:58,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:27:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:27:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:27:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:27:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:27:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:27:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:27:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:27:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:27:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927372374] [2022-03-20 02:27:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927372374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:27:58,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:27:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:27:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608338581] [2022-03-20 02:27:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:27:58,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:27:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:27:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:27:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:27:58,363 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) [2022-03-20 02:28:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:00,556 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-03-20 02:28:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:28:00,556 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 [2022-03-20 02:28:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:00,559 INFO L225 Difference]: With dead ends: 933 [2022-03-20 02:28:00,559 INFO L226 Difference]: Without dead ends: 927 [2022-03-20 02:28:00,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:00,561 INFO L913 BasicCegarLoop]: 624 mSDtfsCounter, 2909 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:00,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 1262 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:28:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-20 02:28:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-03-20 02:28:00,625 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) [2022-03-20 02:28:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-03-20 02:28:00,626 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-03-20 02:28:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:00,626 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-03-20 02:28:00,626 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) [2022-03-20 02:28:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-03-20 02:28:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 02:28:00,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:00,628 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:00,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 02:28:00,628 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-03-20 02:28:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:00,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422158065] [2022-03-20 02:28:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:00,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422158065] [2022-03-20 02:28:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422158065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 02:28:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250007008] [2022-03-20 02:28:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:00,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:28:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:28:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:28:00,892 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) [2022-03-20 02:28:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:03,575 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-03-20 02:28:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:28:03,575 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 [2022-03-20 02:28:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:03,581 INFO L225 Difference]: With dead ends: 956 [2022-03-20 02:28:03,581 INFO L226 Difference]: Without dead ends: 916 [2022-03-20 02:28:03,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:03,582 INFO L913 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 4937 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 4937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:03,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2701 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 4937 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 02:28:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-03-20 02:28:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-03-20 02:28:03,668 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) [2022-03-20 02:28:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-03-20 02:28:03,671 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-03-20 02:28:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:03,671 INFO L478 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-03-20 02:28:03,671 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) [2022-03-20 02:28:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-03-20 02:28:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 02:28:03,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:03,674 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:03,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 02:28:03,674 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-03-20 02:28:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517399071] [2022-03-20 02:28:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:28:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:03,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517399071] [2022-03-20 02:28:03,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517399071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:03,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:03,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 02:28:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765177391] [2022-03-20 02:28:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:03,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:28:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:28:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:28:03,874 INFO L87 Difference]: Start difference. First operand 796 states and 1083 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) [2022-03-20 02:28:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:05,938 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-03-20 02:28:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:28:05,938 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 [2022-03-20 02:28:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:05,941 INFO L225 Difference]: With dead ends: 932 [2022-03-20 02:28:05,941 INFO L226 Difference]: Without dead ends: 914 [2022-03-20 02:28:05,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:05,942 INFO L913 BasicCegarLoop]: 657 mSDtfsCounter, 338 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 5125 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 5264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:05,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 2608 Invalid, 5264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5125 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 02:28:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-03-20 02:28:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-03-20 02:28:06,001 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) [2022-03-20 02:28:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-03-20 02:28:06,002 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 55 [2022-03-20 02:28:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:06,002 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-03-20 02:28:06,003 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) [2022-03-20 02:28:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-03-20 02:28:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 02:28:06,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:06,004 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:06,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 02:28:06,004 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-03-20 02:28:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:06,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488232953] [2022-03-20 02:28:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:06,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:28:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:28:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:06,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488232953] [2022-03-20 02:28:06,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488232953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:06,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:06,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 02:28:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221532789] [2022-03-20 02:28:06,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:06,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 02:28:06,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 02:28:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:28:06,147 INFO L87 Difference]: Start difference. First operand 794 states and 1079 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) [2022-03-20 02:28:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:07,858 INFO L93 Difference]: Finished difference Result 979 states and 1361 transitions. [2022-03-20 02:28:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 02:28:07,859 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 [2022-03-20 02:28:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:07,862 INFO L225 Difference]: With dead ends: 979 [2022-03-20 02:28:07,862 INFO L226 Difference]: Without dead ends: 936 [2022-03-20 02:28:07,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:28:07,863 INFO L913 BasicCegarLoop]: 680 mSDtfsCounter, 1517 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:07,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 1331 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 02:28:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-20 02:28:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 794. [2022-03-20 02:28:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 621 states have (on average 1.3494363929146538) internal successors, (838), 633 states have internal predecessors, (838), 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) [2022-03-20 02:28:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1078 transitions. [2022-03-20 02:28:07,945 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1078 transitions. Word has length 56 [2022-03-20 02:28:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:07,945 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1078 transitions. [2022-03-20 02:28:07,945 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) [2022-03-20 02:28:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1078 transitions. [2022-03-20 02:28:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 02:28:07,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:07,947 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:07,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 02:28:07,947 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-03-20 02:28:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614940927] [2022-03-20 02:28:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:28:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:08,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614940927] [2022-03-20 02:28:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614940927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:08,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:08,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 02:28:08,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275671452] [2022-03-20 02:28:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:08,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:28:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:28:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:28:08,178 INFO L87 Difference]: Start difference. First operand 794 states and 1078 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) [2022-03-20 02:28:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:11,237 INFO L93 Difference]: Finished difference Result 927 states and 1302 transitions. [2022-03-20 02:28:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:28:11,237 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 [2022-03-20 02:28:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:11,241 INFO L225 Difference]: With dead ends: 927 [2022-03-20 02:28:11,241 INFO L226 Difference]: Without dead ends: 909 [2022-03-20 02:28:11,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:11,242 INFO L913 BasicCegarLoop]: 653 mSDtfsCounter, 975 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 5423 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 5822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:11,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 2657 Invalid, 5822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5423 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 02:28:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-20 02:28:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-03-20 02:28:11,314 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) [2022-03-20 02:28:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-03-20 02:28:11,316 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-03-20 02:28:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:11,318 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-03-20 02:28:11,318 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) [2022-03-20 02:28:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-03-20 02:28:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 02:28:11,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:11,320 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:11,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 02:28:11,320 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-03-20 02:28:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302628346] [2022-03-20 02:28:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 02:28:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:28:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302628346] [2022-03-20 02:28:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302628346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:11,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:11,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 02:28:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073139461] [2022-03-20 02:28:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:11,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:28:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:28:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:28:11,436 INFO L87 Difference]: Start difference. First operand 789 states and 1071 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) [2022-03-20 02:28:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:13,183 INFO L93 Difference]: Finished difference Result 1176 states and 1626 transitions. [2022-03-20 02:28:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 02:28:13,184 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 [2022-03-20 02:28:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:13,189 INFO L225 Difference]: With dead ends: 1176 [2022-03-20 02:28:13,189 INFO L226 Difference]: Without dead ends: 1013 [2022-03-20 02:28:13,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:28:13,194 INFO L913 BasicCegarLoop]: 660 mSDtfsCounter, 677 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:13,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 1232 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 02:28:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-20 02:28:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 830. [2022-03-20 02:28:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 651 states have (on average 1.337941628264209) internal successors, (871), 662 states have internal predecessors, (871), 105 states have call successors, (105), 53 states have call predecessors, (105), 73 states have return successors, (135), 121 states have call predecessors, (135), 100 states have call successors, (135) [2022-03-20 02:28:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-03-20 02:28:13,294 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 61 [2022-03-20 02:28:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:13,294 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-03-20 02:28:13,294 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) [2022-03-20 02:28:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-03-20 02:28:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 02:28:13,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:13,297 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:13,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 02:28:13,297 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-03-20 02:28:13,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:13,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352731486] [2022-03-20 02:28:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:13,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:13,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352731486] [2022-03-20 02:28:13,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352731486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:13,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:13,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 02:28:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468821866] [2022-03-20 02:28:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:13,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 02:28:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 02:28:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:13,568 INFO L87 Difference]: Start difference. First operand 830 states and 1111 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) [2022-03-20 02:28:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:16,439 INFO L93 Difference]: Finished difference Result 998 states and 1383 transitions. [2022-03-20 02:28:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 02:28:16,439 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 [2022-03-20 02:28:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:16,442 INFO L225 Difference]: With dead ends: 998 [2022-03-20 02:28:16,442 INFO L226 Difference]: Without dead ends: 972 [2022-03-20 02:28:16,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-20 02:28:16,443 INFO L913 BasicCegarLoop]: 634 mSDtfsCounter, 403 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 5844 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 6010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 5844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:16,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 2948 Invalid, 6010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 5844 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 02:28:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-03-20 02:28:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 829. [2022-03-20 02:28:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 650 states have (on average 1.323076923076923) internal successors, (860), 661 states have internal predecessors, (860), 105 states have call successors, (105), 53 states have call predecessors, (105), 73 states have return successors, (135), 121 states have call predecessors, (135), 100 states have call successors, (135) [2022-03-20 02:28:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1100 transitions. [2022-03-20 02:28:16,532 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1100 transitions. Word has length 59 [2022-03-20 02:28:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:16,532 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1100 transitions. [2022-03-20 02:28:16,532 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) [2022-03-20 02:28:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1100 transitions. [2022-03-20 02:28:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 02:28:16,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:16,534 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:16,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 02:28:16,534 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-03-20 02:28:16,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:16,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366461274] [2022-03-20 02:28:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:16,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:16,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366461274] [2022-03-20 02:28:16,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366461274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:16,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:16,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 02:28:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418572115] [2022-03-20 02:28:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:16,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:28:16,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:28:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:16,794 INFO L87 Difference]: Start difference. First operand 829 states and 1100 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) [2022-03-20 02:28:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:19,728 INFO L93 Difference]: Finished difference Result 987 states and 1357 transitions. [2022-03-20 02:28:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 02:28:19,729 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 [2022-03-20 02:28:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:19,733 INFO L225 Difference]: With dead ends: 987 [2022-03-20 02:28:19,733 INFO L226 Difference]: Without dead ends: 967 [2022-03-20 02:28:19,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:28:19,734 INFO L913 BasicCegarLoop]: 650 mSDtfsCounter, 935 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:19,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 2955 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 02:28:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-03-20 02:28:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 826. [2022-03-20 02:28:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 648 states have (on average 1.3225308641975309) internal successors, (857), 659 states have internal predecessors, (857), 104 states have call successors, (104), 53 states have call predecessors, (104), 73 states have return successors, (134), 120 states have call predecessors, (134), 99 states have call successors, (134) [2022-03-20 02:28:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1095 transitions. [2022-03-20 02:28:19,869 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1095 transitions. Word has length 58 [2022-03-20 02:28:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:19,870 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1095 transitions. [2022-03-20 02:28:19,870 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) [2022-03-20 02:28:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1095 transitions. [2022-03-20 02:28:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 02:28:19,872 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:19,872 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:19,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 02:28:19,873 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-03-20 02:28:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:19,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130561090] [2022-03-20 02:28:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:19,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:20,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:20,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:20,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 02:28:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130561090] [2022-03-20 02:28:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130561090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:20,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:20,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 02:28:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058797319] [2022-03-20 02:28:20,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:20,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:28:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:28:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:20,130 INFO L87 Difference]: Start difference. First operand 826 states and 1095 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) [2022-03-20 02:28:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:23,469 INFO L93 Difference]: Finished difference Result 1020 states and 1389 transitions. [2022-03-20 02:28:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 02:28:23,469 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 [2022-03-20 02:28:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:23,477 INFO L225 Difference]: With dead ends: 1020 [2022-03-20 02:28:23,478 INFO L226 Difference]: Without dead ends: 952 [2022-03-20 02:28:23,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-20 02:28:23,479 INFO L913 BasicCegarLoop]: 626 mSDtfsCounter, 364 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 5271 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 5271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:23,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 2598 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 5271 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 02:28:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-03-20 02:28:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 814. [2022-03-20 02:28:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 639 states have (on average 1.3176838810641627) internal successors, (842), 650 states have internal predecessors, (842), 101 states have call successors, (101), 53 states have call predecessors, (101), 73 states have return successors, (131), 117 states have call predecessors, (131), 96 states have call successors, (131) [2022-03-20 02:28:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1074 transitions. [2022-03-20 02:28:23,605 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1074 transitions. Word has length 59 [2022-03-20 02:28:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:23,605 INFO L478 AbstractCegarLoop]: Abstraction has 814 states and 1074 transitions. [2022-03-20 02:28:23,605 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) [2022-03-20 02:28:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1074 transitions. [2022-03-20 02:28:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 02:28:23,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:23,607 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:23,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 02:28:23,610 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-03-20 02:28:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133583408] [2022-03-20 02:28:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 02:28:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:23,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133583408] [2022-03-20 02:28:23,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133583408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:23,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:23,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 02:28:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490812627] [2022-03-20 02:28:23,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:23,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 02:28:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 02:28:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:28:23,855 INFO L87 Difference]: Start difference. First operand 814 states and 1074 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) [2022-03-20 02:28:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:25,883 INFO L93 Difference]: Finished difference Result 1118 states and 1565 transitions. [2022-03-20 02:28:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 02:28:25,883 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 [2022-03-20 02:28:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:25,900 INFO L225 Difference]: With dead ends: 1118 [2022-03-20 02:28:25,901 INFO L226 Difference]: Without dead ends: 1013 [2022-03-20 02:28:25,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:28:25,909 INFO L913 BasicCegarLoop]: 607 mSDtfsCounter, 992 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:25,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1534 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:28:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-20 02:28:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 821. [2022-03-20 02:28:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 644 states have (on average 1.3183229813664596) internal successors, (849), 656 states have internal predecessors, (849), 102 states have call successors, (102), 53 states have call predecessors, (102), 74 states have return successors, (138), 118 states have call predecessors, (138), 97 states have call successors, (138) [2022-03-20 02:28:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1089 transitions. [2022-03-20 02:28:26,031 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1089 transitions. Word has length 60 [2022-03-20 02:28:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:26,032 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1089 transitions. [2022-03-20 02:28:26,032 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) [2022-03-20 02:28:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1089 transitions. [2022-03-20 02:28:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 02:28:26,034 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:26,034 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:26,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 02:28:26,034 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-03-20 02:28:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:26,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547331181] [2022-03-20 02:28:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 02:28:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:26,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547331181] [2022-03-20 02:28:26,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547331181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:26,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:26,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 02:28:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098385306] [2022-03-20 02:28:26,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:26,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:28:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:28:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:26,255 INFO L87 Difference]: Start difference. First operand 821 states and 1089 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) [2022-03-20 02:28:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:28,861 INFO L93 Difference]: Finished difference Result 985 states and 1361 transitions. [2022-03-20 02:28:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:28:28,862 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 [2022-03-20 02:28:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:28,865 INFO L225 Difference]: With dead ends: 985 [2022-03-20 02:28:28,865 INFO L226 Difference]: Without dead ends: 960 [2022-03-20 02:28:28,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:28,866 INFO L913 BasicCegarLoop]: 631 mSDtfsCounter, 1258 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:28,866 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 2535 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 4253 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 02:28:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-03-20 02:28:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 819. [2022-03-20 02:28:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 643 states have (on average 1.317262830482115) internal successors, (847), 655 states have internal predecessors, (847), 101 states have call successors, (101), 53 states have call predecessors, (101), 74 states have return successors, (137), 117 states have call predecessors, (137), 96 states have call successors, (137) [2022-03-20 02:28:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1085 transitions. [2022-03-20 02:28:28,977 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1085 transitions. Word has length 60 [2022-03-20 02:28:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:28,977 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1085 transitions. [2022-03-20 02:28:28,978 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) [2022-03-20 02:28:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1085 transitions. [2022-03-20 02:28:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 02:28:28,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:28,980 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:28,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 02:28:28,980 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-03-20 02:28:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531919437] [2022-03-20 02:28:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:28:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:29,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531919437] [2022-03-20 02:28:29,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531919437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:29,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:29,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 02:28:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407777798] [2022-03-20 02:28:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:29,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:28:29,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:29,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:28:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:28:29,231 INFO L87 Difference]: Start difference. First operand 819 states and 1085 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) [2022-03-20 02:28:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:31,582 INFO L93 Difference]: Finished difference Result 1030 states and 1413 transitions. [2022-03-20 02:28:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 02:28:31,588 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 [2022-03-20 02:28:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:31,592 INFO L225 Difference]: With dead ends: 1030 [2022-03-20 02:28:31,592 INFO L226 Difference]: Without dead ends: 949 [2022-03-20 02:28:31,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-20 02:28:31,593 INFO L913 BasicCegarLoop]: 625 mSDtfsCounter, 660 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 4340 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:31,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 2484 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:28:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-03-20 02:28:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 811. [2022-03-20 02:28:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 637 states have (on average 1.3108320251177394) internal successors, (835), 649 states have internal predecessors, (835), 99 states have call successors, (99), 53 states have call predecessors, (99), 74 states have return successors, (135), 115 states have call predecessors, (135), 94 states have call successors, (135) [2022-03-20 02:28:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1069 transitions. [2022-03-20 02:28:31,711 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1069 transitions. Word has length 60 [2022-03-20 02:28:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:31,711 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1069 transitions. [2022-03-20 02:28:31,712 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) [2022-03-20 02:28:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1069 transitions. [2022-03-20 02:28:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 02:28:31,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:31,713 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:31,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 02:28:31,714 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-03-20 02:28:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:31,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573379056] [2022-03-20 02:28:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:28:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:31,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573379056] [2022-03-20 02:28:31,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573379056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:31,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:31,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:28:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010065777] [2022-03-20 02:28:31,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:31,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:28:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:28:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:28:31,903 INFO L87 Difference]: Start difference. First operand 811 states and 1069 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) [2022-03-20 02:28:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:34,410 INFO L93 Difference]: Finished difference Result 997 states and 1383 transitions. [2022-03-20 02:28:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:28:34,411 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 [2022-03-20 02:28:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:34,422 INFO L225 Difference]: With dead ends: 997 [2022-03-20 02:28:34,422 INFO L226 Difference]: Without dead ends: 963 [2022-03-20 02:28:34,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:28:34,425 INFO L913 BasicCegarLoop]: 591 mSDtfsCounter, 332 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 3058 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 3203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:34,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1800 Invalid, 3203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3058 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 02:28:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-20 02:28:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 815. [2022-03-20 02:28:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 639 states have (on average 1.3098591549295775) internal successors, (837), 653 states have internal predecessors, (837), 99 states have call successors, (99), 53 states have call predecessors, (99), 76 states have return successors, (151), 115 states have call predecessors, (151), 94 states have call successors, (151) [2022-03-20 02:28:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1087 transitions. [2022-03-20 02:28:34,570 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1087 transitions. Word has length 61 [2022-03-20 02:28:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:34,571 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1087 transitions. [2022-03-20 02:28:34,571 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) [2022-03-20 02:28:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1087 transitions. [2022-03-20 02:28:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 02:28:34,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:34,574 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:34,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 02:28:34,574 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-03-20 02:28:34,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:34,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446212897] [2022-03-20 02:28:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 02:28:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:34,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446212897] [2022-03-20 02:28:34,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446212897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:34,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:34,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 02:28:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218315793] [2022-03-20 02:28:34,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:34,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 02:28:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 02:28:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:34,972 INFO L87 Difference]: Start difference. First operand 815 states and 1087 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) [2022-03-20 02:28:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:37,532 INFO L93 Difference]: Finished difference Result 975 states and 1353 transitions. [2022-03-20 02:28:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 02:28:37,532 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 [2022-03-20 02:28:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:37,535 INFO L225 Difference]: With dead ends: 975 [2022-03-20 02:28:37,535 INFO L226 Difference]: Without dead ends: 951 [2022-03-20 02:28:37,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-20 02:28:37,536 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 1482 mSDsluCounter, 2726 mSDsCounter, 0 mSdLazyCounter, 5479 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 6085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 5479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:37,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 3316 Invalid, 6085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 5479 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 02:28:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-03-20 02:28:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 813. [2022-03-20 02:28:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 638 states have (on average 1.3087774294670846) internal successors, (835), 652 states have internal predecessors, (835), 98 states have call successors, (98), 53 states have call predecessors, (98), 76 states have return successors, (150), 114 states have call predecessors, (150), 93 states have call successors, (150) [2022-03-20 02:28:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1083 transitions. [2022-03-20 02:28:37,602 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1083 transitions. Word has length 63 [2022-03-20 02:28:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:37,603 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1083 transitions. [2022-03-20 02:28:37,603 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) [2022-03-20 02:28:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1083 transitions. [2022-03-20 02:28:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 02:28:37,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:37,604 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:37,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 02:28:37,604 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:37,605 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-03-20 02:28:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:37,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574883637] [2022-03-20 02:28:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:28:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574883637] [2022-03-20 02:28:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574883637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:37,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 02:28:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596915185] [2022-03-20 02:28:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:37,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 02:28:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 02:28:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:37,931 INFO L87 Difference]: Start difference. First operand 813 states and 1083 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) [2022-03-20 02:28:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:40,456 INFO L93 Difference]: Finished difference Result 975 states and 1351 transitions. [2022-03-20 02:28:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:28:40,457 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 [2022-03-20 02:28:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:40,460 INFO L225 Difference]: With dead ends: 975 [2022-03-20 02:28:40,460 INFO L226 Difference]: Without dead ends: 950 [2022-03-20 02:28:40,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 02:28:40,467 INFO L913 BasicCegarLoop]: 588 mSDtfsCounter, 1217 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 5605 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 3542 SdHoareTripleChecker+Invalid, 6101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 5605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:40,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 3542 Invalid, 6101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 5605 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 02:28:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-03-20 02:28:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 811. [2022-03-20 02:28:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 637 states have (on average 1.3076923076923077) internal successors, (833), 651 states have internal predecessors, (833), 97 states have call successors, (97), 53 states have call predecessors, (97), 76 states have return successors, (149), 113 states have call predecessors, (149), 92 states have call successors, (149) [2022-03-20 02:28:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1079 transitions. [2022-03-20 02:28:40,543 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1079 transitions. Word has length 66 [2022-03-20 02:28:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:40,543 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1079 transitions. [2022-03-20 02:28:40,543 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) [2022-03-20 02:28:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1079 transitions. [2022-03-20 02:28:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 02:28:40,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:40,545 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:40,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 02:28:40,545 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-03-20 02:28:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105907814] [2022-03-20 02:28:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:40,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105907814] [2022-03-20 02:28:40,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105907814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:40,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:40,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 02:28:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207150429] [2022-03-20 02:28:40,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:40,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 02:28:40,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 02:28:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:40,841 INFO L87 Difference]: Start difference. First operand 811 states and 1079 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) [2022-03-20 02:28:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:43,345 INFO L93 Difference]: Finished difference Result 972 states and 1344 transitions. [2022-03-20 02:28:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:28:43,345 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 [2022-03-20 02:28:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:43,348 INFO L225 Difference]: With dead ends: 972 [2022-03-20 02:28:43,348 INFO L226 Difference]: Without dead ends: 947 [2022-03-20 02:28:43,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 02:28:43,349 INFO L913 BasicCegarLoop]: 585 mSDtfsCounter, 661 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 5704 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 5962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 5704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:43,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 3361 Invalid, 5962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 5704 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 02:28:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-20 02:28:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 809. [2022-03-20 02:28:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 636 states have (on average 1.3066037735849056) internal successors, (831), 650 states have internal predecessors, (831), 96 states have call successors, (96), 53 states have call predecessors, (96), 76 states have return successors, (148), 112 states have call predecessors, (148), 91 states have call successors, (148) [2022-03-20 02:28:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1075 transitions. [2022-03-20 02:28:43,418 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1075 transitions. Word has length 67 [2022-03-20 02:28:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:43,418 INFO L478 AbstractCegarLoop]: Abstraction has 809 states and 1075 transitions. [2022-03-20 02:28:43,418 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) [2022-03-20 02:28:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1075 transitions. [2022-03-20 02:28:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 02:28:43,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:43,420 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:43,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 02:28:43,420 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-03-20 02:28:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804234468] [2022-03-20 02:28:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 02:28:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:43,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:43,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804234468] [2022-03-20 02:28:43,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804234468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:43,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:43,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 02:28:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023656134] [2022-03-20 02:28:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:43,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 02:28:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 02:28:43,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:28:43,736 INFO L87 Difference]: Start difference. First operand 809 states and 1075 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) [2022-03-20 02:28:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:46,872 INFO L93 Difference]: Finished difference Result 967 states and 1335 transitions. [2022-03-20 02:28:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 02:28:46,873 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 [2022-03-20 02:28:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:46,876 INFO L225 Difference]: With dead ends: 967 [2022-03-20 02:28:46,876 INFO L226 Difference]: Without dead ends: 943 [2022-03-20 02:28:46,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-20 02:28:46,877 INFO L913 BasicCegarLoop]: 562 mSDtfsCounter, 889 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 5988 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 6345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 5988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:46,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 3083 Invalid, 6345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 5988 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 02:28:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-20 02:28:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 807. [2022-03-20 02:28:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 635 states have (on average 1.3055118110236221) internal successors, (829), 649 states have internal predecessors, (829), 95 states have call successors, (95), 53 states have call predecessors, (95), 76 states have return successors, (147), 111 states have call predecessors, (147), 90 states have call successors, (147) [2022-03-20 02:28:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1071 transitions. [2022-03-20 02:28:46,984 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1071 transitions. Word has length 62 [2022-03-20 02:28:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:46,984 INFO L478 AbstractCegarLoop]: Abstraction has 807 states and 1071 transitions. [2022-03-20 02:28:46,985 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) [2022-03-20 02:28:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1071 transitions. [2022-03-20 02:28:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 02:28:46,986 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:46,986 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:46,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 02:28:46,987 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-03-20 02:28:46,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:46,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121921586] [2022-03-20 02:28:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:47,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121921586] [2022-03-20 02:28:47,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121921586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:47,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:47,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:28:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971682824] [2022-03-20 02:28:47,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:47,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:28:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:28:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:47,301 INFO L87 Difference]: Start difference. First operand 807 states and 1071 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) [2022-03-20 02:28:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:49,191 INFO L93 Difference]: Finished difference Result 960 states and 1326 transitions. [2022-03-20 02:28:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:28:49,191 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 [2022-03-20 02:28:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:49,194 INFO L225 Difference]: With dead ends: 960 [2022-03-20 02:28:49,194 INFO L226 Difference]: Without dead ends: 938 [2022-03-20 02:28:49,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:49,195 INFO L913 BasicCegarLoop]: 583 mSDtfsCounter, 1158 mSDsluCounter, 2409 mSDsCounter, 0 mSdLazyCounter, 5127 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 5582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 5127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:49,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 2992 Invalid, 5582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 5127 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 02:28:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-20 02:28:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 802. [2022-03-20 02:28:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 632 states have (on average 1.3053797468354431) internal successors, (825), 646 states have internal predecessors, (825), 94 states have call successors, (94), 53 states have call predecessors, (94), 75 states have return successors, (145), 109 states have call predecessors, (145), 89 states have call successors, (145) [2022-03-20 02:28:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1064 transitions. [2022-03-20 02:28:49,264 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1064 transitions. Word has length 62 [2022-03-20 02:28:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:49,264 INFO L478 AbstractCegarLoop]: Abstraction has 802 states and 1064 transitions. [2022-03-20 02:28:49,264 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) [2022-03-20 02:28:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1064 transitions. [2022-03-20 02:28:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 02:28:49,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:49,266 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:49,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 02:28:49,266 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-03-20 02:28:49,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:49,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164798275] [2022-03-20 02:28:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 02:28:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164798275] [2022-03-20 02:28:49,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164798275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:49,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:49,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 02:28:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086274967] [2022-03-20 02:28:49,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:49,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 02:28:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 02:28:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:28:49,417 INFO L87 Difference]: Start difference. First operand 802 states and 1064 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) [2022-03-20 02:28:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:50,571 INFO L93 Difference]: Finished difference Result 1152 states and 1558 transitions. [2022-03-20 02:28:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:28:50,571 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 [2022-03-20 02:28:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:50,574 INFO L225 Difference]: With dead ends: 1152 [2022-03-20 02:28:50,574 INFO L226 Difference]: Without dead ends: 799 [2022-03-20 02:28:50,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:28:50,575 INFO L913 BasicCegarLoop]: 514 mSDtfsCounter, 350 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:50,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 913 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 02:28:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-20 02:28:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 694. [2022-03-20 02:28:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 547 states have (on average 1.2961608775137112) internal successors, (709), 560 states have internal predecessors, (709), 82 states have call successors, (82), 47 states have call predecessors, (82), 64 states have return successors, (104), 93 states have call predecessors, (104), 77 states have call successors, (104) [2022-03-20 02:28:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 895 transitions. [2022-03-20 02:28:50,644 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 895 transitions. Word has length 63 [2022-03-20 02:28:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:50,644 INFO L478 AbstractCegarLoop]: Abstraction has 694 states and 895 transitions. [2022-03-20 02:28:50,644 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) [2022-03-20 02:28:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 895 transitions. [2022-03-20 02:28:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:28:50,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:50,646 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:50,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 02:28:50,646 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-03-20 02:28:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645208308] [2022-03-20 02:28:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:28:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:50,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645208308] [2022-03-20 02:28:50,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645208308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:50,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:50,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:28:50,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540252377] [2022-03-20 02:28:50,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:50,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:28:50,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:28:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:50,966 INFO L87 Difference]: Start difference. First operand 694 states and 895 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) [2022-03-20 02:28:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:53,089 INFO L93 Difference]: Finished difference Result 781 states and 1023 transitions. [2022-03-20 02:28:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:28:53,090 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 [2022-03-20 02:28:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:53,104 INFO L225 Difference]: With dead ends: 781 [2022-03-20 02:28:53,104 INFO L226 Difference]: Without dead ends: 751 [2022-03-20 02:28:53,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:53,105 INFO L913 BasicCegarLoop]: 519 mSDtfsCounter, 296 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:53,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 2561 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 02:28:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-20 02:28:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 683. [2022-03-20 02:28:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 539 states have (on average 1.2968460111317255) internal successors, (699), 552 states have internal predecessors, (699), 80 states have call successors, (80), 47 states have call predecessors, (80), 63 states have return successors, (101), 90 states have call predecessors, (101), 75 states have call successors, (101) [2022-03-20 02:28:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 880 transitions. [2022-03-20 02:28:53,165 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 880 transitions. Word has length 69 [2022-03-20 02:28:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:53,165 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 880 transitions. [2022-03-20 02:28:53,165 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) [2022-03-20 02:28:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 880 transitions. [2022-03-20 02:28:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 02:28:53,167 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:53,168 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:53,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 02:28:53,168 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-03-20 02:28:53,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:53,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315310254] [2022-03-20 02:28:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:53,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 02:28:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:53,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315310254] [2022-03-20 02:28:53,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315310254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:53,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:53,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:28:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416504553] [2022-03-20 02:28:53,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:53,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:28:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:28:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:53,477 INFO L87 Difference]: Start difference. First operand 683 states and 880 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) [2022-03-20 02:28:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:56,264 INFO L93 Difference]: Finished difference Result 771 states and 1007 transitions. [2022-03-20 02:28:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:28:56,265 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 [2022-03-20 02:28:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:56,267 INFO L225 Difference]: With dead ends: 771 [2022-03-20 02:28:56,267 INFO L226 Difference]: Without dead ends: 749 [2022-03-20 02:28:56,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:28:56,268 INFO L913 BasicCegarLoop]: 510 mSDtfsCounter, 283 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 5495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 5389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:56,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2579 Invalid, 5495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 5389 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 02:28:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-20 02:28:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 681. [2022-03-20 02:28:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 538 states have (on average 1.295539033457249) internal successors, (697), 551 states have internal predecessors, (697), 79 states have call successors, (79), 47 states have call predecessors, (79), 63 states have return successors, (100), 89 states have call predecessors, (100), 74 states have call successors, (100) [2022-03-20 02:28:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 876 transitions. [2022-03-20 02:28:56,327 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 876 transitions. Word has length 72 [2022-03-20 02:28:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:56,328 INFO L478 AbstractCegarLoop]: Abstraction has 681 states and 876 transitions. [2022-03-20 02:28:56,328 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) [2022-03-20 02:28:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 876 transitions. [2022-03-20 02:28:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 02:28:56,329 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:56,329 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:56,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 02:28:56,329 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-03-20 02:28:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:56,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206199072] [2022-03-20 02:28:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:28:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:28:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:28:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:28:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:56,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206199072] [2022-03-20 02:28:56,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206199072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:56,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:56,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:28:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916179268] [2022-03-20 02:28:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:56,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:28:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:28:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:28:56,692 INFO L87 Difference]: Start difference. First operand 681 states and 876 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) [2022-03-20 02:28:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:28:59,265 INFO L93 Difference]: Finished difference Result 766 states and 1000 transitions. [2022-03-20 02:28:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:28:59,265 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 [2022-03-20 02:28:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:28:59,267 INFO L225 Difference]: With dead ends: 766 [2022-03-20 02:28:59,267 INFO L226 Difference]: Without dead ends: 744 [2022-03-20 02:28:59,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-20 02:28:59,268 INFO L913 BasicCegarLoop]: 500 mSDtfsCounter, 288 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 5356 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 5356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:28:59,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2470 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 5356 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 02:28:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-20 02:28:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 676. [2022-03-20 02:28:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 535 states have (on average 1.2953271028037383) internal successors, (693), 548 states have internal predecessors, (693), 78 states have call successors, (78), 47 states have call predecessors, (78), 62 states have return successors, (98), 87 states have call predecessors, (98), 73 states have call successors, (98) [2022-03-20 02:28:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 869 transitions. [2022-03-20 02:28:59,328 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 869 transitions. Word has length 63 [2022-03-20 02:28:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:28:59,329 INFO L478 AbstractCegarLoop]: Abstraction has 676 states and 869 transitions. [2022-03-20 02:28:59,329 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) [2022-03-20 02:28:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 869 transitions. [2022-03-20 02:28:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 02:28:59,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:28:59,330 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:28:59,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 02:28:59,330 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:28:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:28:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-03-20 02:28:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:28:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754408] [2022-03-20 02:28:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:28:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:28:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:28:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:28:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:28:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 02:28:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:28:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:28:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:28:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:28:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:28:59,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:28:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754408] [2022-03-20 02:28:59,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:28:59,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:28:59,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 02:28:59,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166652377] [2022-03-20 02:28:59,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:28:59,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 02:28:59,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:28:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 02:28:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 02:28:59,468 INFO L87 Difference]: Start difference. First operand 676 states and 869 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) [2022-03-20 02:29:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:00,280 INFO L93 Difference]: Finished difference Result 864 states and 1133 transitions. [2022-03-20 02:29:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:29:00,280 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 [2022-03-20 02:29:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:00,282 INFO L225 Difference]: With dead ends: 864 [2022-03-20 02:29:00,282 INFO L226 Difference]: Without dead ends: 744 [2022-03-20 02:29:00,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:29:00,283 INFO L913 BasicCegarLoop]: 464 mSDtfsCounter, 930 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:00,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 876 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 02:29:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-20 02:29:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 676. [2022-03-20 02:29:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 535 states have (on average 1.291588785046729) internal successors, (691), 548 states have internal predecessors, (691), 78 states have call successors, (78), 47 states have call predecessors, (78), 62 states have return successors, (98), 87 states have call predecessors, (98), 73 states have call successors, (98) [2022-03-20 02:29:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 867 transitions. [2022-03-20 02:29:00,368 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 867 transitions. Word has length 66 [2022-03-20 02:29:00,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:00,368 INFO L478 AbstractCegarLoop]: Abstraction has 676 states and 867 transitions. [2022-03-20 02:29:00,368 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) [2022-03-20 02:29:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 867 transitions. [2022-03-20 02:29:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 02:29:00,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:00,370 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:00,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 02:29:00,371 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-03-20 02:29:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:00,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918871522] [2022-03-20 02:29:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918871522] [2022-03-20 02:29:00,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918871522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:00,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:00,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800911926] [2022-03-20 02:29:00,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:00,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:00,562 INFO L87 Difference]: Start difference. First operand 676 states and 867 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) [2022-03-20 02:29:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:02,060 INFO L93 Difference]: Finished difference Result 808 states and 1049 transitions. [2022-03-20 02:29:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 02:29:02,061 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 [2022-03-20 02:29:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:02,063 INFO L225 Difference]: With dead ends: 808 [2022-03-20 02:29:02,063 INFO L226 Difference]: Without dead ends: 775 [2022-03-20 02:29:02,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:29:02,064 INFO L913 BasicCegarLoop]: 481 mSDtfsCounter, 720 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:02,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1345 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 02:29:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-20 02:29:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 682. [2022-03-20 02:29:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 540 states have (on average 1.2907407407407407) internal successors, (697), 553 states have internal predecessors, (697), 79 states have call successors, (79), 47 states have call predecessors, (79), 62 states have return successors, (99), 88 states have call predecessors, (99), 74 states have call successors, (99) [2022-03-20 02:29:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 875 transitions. [2022-03-20 02:29:02,152 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 875 transitions. Word has length 65 [2022-03-20 02:29:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:02,152 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 875 transitions. [2022-03-20 02:29:02,152 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) [2022-03-20 02:29:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 875 transitions. [2022-03-20 02:29:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 02:29:02,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:02,154 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:02,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 02:29:02,154 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-03-20 02:29:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:02,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511254162] [2022-03-20 02:29:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:02,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 02:29:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511254162] [2022-03-20 02:29:02,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511254162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:02,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:02,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820299927] [2022-03-20 02:29:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:02,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:02,376 INFO L87 Difference]: Start difference. First operand 682 states and 875 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) [2022-03-20 02:29:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:04,975 INFO L93 Difference]: Finished difference Result 806 states and 1042 transitions. [2022-03-20 02:29:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:29:04,976 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 [2022-03-20 02:29:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:04,979 INFO L225 Difference]: With dead ends: 806 [2022-03-20 02:29:04,979 INFO L226 Difference]: Without dead ends: 752 [2022-03-20 02:29:04,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:29:04,980 INFO L913 BasicCegarLoop]: 486 mSDtfsCounter, 320 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:04,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 1411 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 02:29:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-20 02:29:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 682. [2022-03-20 02:29:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 540 states have (on average 1.287037037037037) internal successors, (695), 553 states have internal predecessors, (695), 79 states have call successors, (79), 47 states have call predecessors, (79), 62 states have return successors, (99), 88 states have call predecessors, (99), 74 states have call successors, (99) [2022-03-20 02:29:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 873 transitions. [2022-03-20 02:29:05,097 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 873 transitions. Word has length 66 [2022-03-20 02:29:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:05,098 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 873 transitions. [2022-03-20 02:29:05,098 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) [2022-03-20 02:29:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 873 transitions. [2022-03-20 02:29:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 02:29:05,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:05,099 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:05,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 02:29:05,100 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-03-20 02:29:05,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:05,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631830706] [2022-03-20 02:29:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 02:29:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:05,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631830706] [2022-03-20 02:29:05,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631830706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:05,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:05,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 02:29:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350586347] [2022-03-20 02:29:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:05,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 02:29:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 02:29:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 02:29:05,431 INFO L87 Difference]: Start difference. First operand 682 states and 873 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) [2022-03-20 02:29:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:07,431 INFO L93 Difference]: Finished difference Result 777 states and 1009 transitions. [2022-03-20 02:29:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:29:07,431 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 [2022-03-20 02:29:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:07,439 INFO L225 Difference]: With dead ends: 777 [2022-03-20 02:29:07,440 INFO L226 Difference]: Without dead ends: 700 [2022-03-20 02:29:07,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:29:07,440 INFO L913 BasicCegarLoop]: 492 mSDtfsCounter, 621 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:07,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 2015 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 02:29:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-20 02:29:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 645. [2022-03-20 02:29:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 510 states have (on average 1.272549019607843) internal successors, (649), 523 states have internal predecessors, (649), 72 states have call successors, (72), 47 states have call predecessors, (72), 62 states have return successors, (91), 81 states have call predecessors, (91), 67 states have call successors, (91) [2022-03-20 02:29:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 812 transitions. [2022-03-20 02:29:07,543 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 812 transitions. Word has length 66 [2022-03-20 02:29:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:07,543 INFO L478 AbstractCegarLoop]: Abstraction has 645 states and 812 transitions. [2022-03-20 02:29:07,543 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) [2022-03-20 02:29:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 812 transitions. [2022-03-20 02:29:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 02:29:07,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:07,545 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:07,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 02:29:07,546 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-03-20 02:29:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059958355] [2022-03-20 02:29:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 02:29:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:07,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:07,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059958355] [2022-03-20 02:29:07,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059958355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:07,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:07,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144139438] [2022-03-20 02:29:07,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:07,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:07,838 INFO L87 Difference]: Start difference. First operand 645 states and 812 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) [2022-03-20 02:29:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:09,322 INFO L93 Difference]: Finished difference Result 728 states and 923 transitions. [2022-03-20 02:29:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:09,323 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 [2022-03-20 02:29:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:09,325 INFO L225 Difference]: With dead ends: 728 [2022-03-20 02:29:09,326 INFO L226 Difference]: Without dead ends: 689 [2022-03-20 02:29:09,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:09,326 INFO L913 BasicCegarLoop]: 433 mSDtfsCounter, 492 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:09,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 1241 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:29:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-03-20 02:29:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 640. [2022-03-20 02:29:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 506 states have (on average 1.2727272727272727) internal successors, (644), 519 states have internal predecessors, (644), 71 states have call successors, (71), 47 states have call predecessors, (71), 62 states have return successors, (90), 80 states have call predecessors, (90), 66 states have call successors, (90) [2022-03-20 02:29:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 805 transitions. [2022-03-20 02:29:09,421 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 805 transitions. Word has length 67 [2022-03-20 02:29:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:09,422 INFO L478 AbstractCegarLoop]: Abstraction has 640 states and 805 transitions. [2022-03-20 02:29:09,422 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) [2022-03-20 02:29:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 805 transitions. [2022-03-20 02:29:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 02:29:09,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:09,423 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:09,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 02:29:09,424 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-03-20 02:29:09,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708582400] [2022-03-20 02:29:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:09,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708582400] [2022-03-20 02:29:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708582400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:09,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:09,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 02:29:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274628018] [2022-03-20 02:29:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:09,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 02:29:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 02:29:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:29:09,660 INFO L87 Difference]: Start difference. First operand 640 states and 805 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) [2022-03-20 02:29:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:11,250 INFO L93 Difference]: Finished difference Result 813 states and 1035 transitions. [2022-03-20 02:29:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 02:29:11,251 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 [2022-03-20 02:29:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:11,253 INFO L225 Difference]: With dead ends: 813 [2022-03-20 02:29:11,253 INFO L226 Difference]: Without dead ends: 805 [2022-03-20 02:29:11,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:11,254 INFO L913 BasicCegarLoop]: 453 mSDtfsCounter, 923 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:11,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 925 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 02:29:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-03-20 02:29:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 682. [2022-03-20 02:29:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 538 states have (on average 1.2657992565055762) internal successors, (681), 553 states have internal predecessors, (681), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (98), 88 states have call predecessors, (98), 68 states have call successors, (98) [2022-03-20 02:29:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 852 transitions. [2022-03-20 02:29:11,334 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 852 transitions. Word has length 67 [2022-03-20 02:29:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:11,334 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 852 transitions. [2022-03-20 02:29:11,334 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) [2022-03-20 02:29:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 852 transitions. [2022-03-20 02:29:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 02:29:11,335 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:11,335 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:11,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 02:29:11,336 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-03-20 02:29:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:11,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583063057] [2022-03-20 02:29:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:11,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583063057] [2022-03-20 02:29:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583063057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:11,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:11,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237426243] [2022-03-20 02:29:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:11,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:11,567 INFO L87 Difference]: Start difference. First operand 682 states and 852 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) [2022-03-20 02:29:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:13,116 INFO L93 Difference]: Finished difference Result 809 states and 1029 transitions. [2022-03-20 02:29:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:29:13,117 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 [2022-03-20 02:29:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:13,118 INFO L225 Difference]: With dead ends: 809 [2022-03-20 02:29:13,118 INFO L226 Difference]: Without dead ends: 803 [2022-03-20 02:29:13,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:29:13,119 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1461 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:13,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 987 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:29:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-20 02:29:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 682. [2022-03-20 02:29:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 538 states have (on average 1.2639405204460967) internal successors, (680), 553 states have internal predecessors, (680), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (98), 88 states have call predecessors, (98), 68 states have call successors, (98) [2022-03-20 02:29:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 851 transitions. [2022-03-20 02:29:13,209 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 851 transitions. Word has length 68 [2022-03-20 02:29:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:13,209 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 851 transitions. [2022-03-20 02:29:13,209 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) [2022-03-20 02:29:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 851 transitions. [2022-03-20 02:29:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 02:29:13,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:13,211 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:13,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 02:29:13,211 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-03-20 02:29:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613925546] [2022-03-20 02:29:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 02:29:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 02:29:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613925546] [2022-03-20 02:29:13,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613925546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:13,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 02:29:13,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901607985] [2022-03-20 02:29:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:13,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 02:29:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 02:29:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-20 02:29:13,531 INFO L87 Difference]: Start difference. First operand 682 states and 851 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) [2022-03-20 02:29:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:15,447 INFO L93 Difference]: Finished difference Result 755 states and 953 transitions. [2022-03-20 02:29:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 02:29:15,448 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 [2022-03-20 02:29:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:15,449 INFO L225 Difference]: With dead ends: 755 [2022-03-20 02:29:15,449 INFO L226 Difference]: Without dead ends: 727 [2022-03-20 02:29:15,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 02:29:15,450 INFO L913 BasicCegarLoop]: 435 mSDtfsCounter, 288 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 5528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:15,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2886 Invalid, 5528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 02:29:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-03-20 02:29:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 678. [2022-03-20 02:29:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 535 states have (on average 1.263551401869159) internal successors, (676), 550 states have internal predecessors, (676), 72 states have call successors, (72), 49 states have call predecessors, (72), 70 states have return successors, (97), 87 states have call predecessors, (97), 67 states have call successors, (97) [2022-03-20 02:29:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 845 transitions. [2022-03-20 02:29:15,593 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 845 transitions. Word has length 70 [2022-03-20 02:29:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:15,593 INFO L478 AbstractCegarLoop]: Abstraction has 678 states and 845 transitions. [2022-03-20 02:29:15,594 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) [2022-03-20 02:29:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 845 transitions. [2022-03-20 02:29:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:29:15,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:15,595 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:15,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 02:29:15,597 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:15,598 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-03-20 02:29:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:15,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329100294] [2022-03-20 02:29:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 02:29:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:29:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:15,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329100294] [2022-03-20 02:29:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329100294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:15,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:15,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271457644] [2022-03-20 02:29:15,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:15,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:15,799 INFO L87 Difference]: Start difference. First operand 678 states and 845 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) [2022-03-20 02:29:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:16,634 INFO L93 Difference]: Finished difference Result 761 states and 956 transitions. [2022-03-20 02:29:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:16,635 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 [2022-03-20 02:29:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:16,637 INFO L225 Difference]: With dead ends: 761 [2022-03-20 02:29:16,637 INFO L226 Difference]: Without dead ends: 722 [2022-03-20 02:29:16,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:16,638 INFO L913 BasicCegarLoop]: 422 mSDtfsCounter, 472 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:16,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 1268 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 02:29:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-20 02:29:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 673. [2022-03-20 02:29:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 531 states have (on average 1.2636534839924671) internal successors, (671), 546 states have internal predecessors, (671), 71 states have call successors, (71), 49 states have call predecessors, (71), 70 states have return successors, (96), 86 states have call predecessors, (96), 66 states have call successors, (96) [2022-03-20 02:29:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 838 transitions. [2022-03-20 02:29:16,733 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 838 transitions. Word has length 69 [2022-03-20 02:29:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:16,734 INFO L478 AbstractCegarLoop]: Abstraction has 673 states and 838 transitions. [2022-03-20 02:29:16,734 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) [2022-03-20 02:29:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 838 transitions. [2022-03-20 02:29:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:29:16,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:16,735 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:16,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 02:29:16,735 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-03-20 02:29:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:16,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236156004] [2022-03-20 02:29:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 02:29:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:29:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:16,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236156004] [2022-03-20 02:29:16,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236156004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:16,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 02:29:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542613699] [2022-03-20 02:29:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:16,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:29:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:29:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:29:16,971 INFO L87 Difference]: Start difference. First operand 673 states and 838 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) [2022-03-20 02:29:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:18,426 INFO L93 Difference]: Finished difference Result 749 states and 944 transitions. [2022-03-20 02:29:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 02:29:18,427 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 [2022-03-20 02:29:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:18,429 INFO L225 Difference]: With dead ends: 749 [2022-03-20 02:29:18,429 INFO L226 Difference]: Without dead ends: 719 [2022-03-20 02:29:18,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-20 02:29:18,430 INFO L913 BasicCegarLoop]: 437 mSDtfsCounter, 708 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:18,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2054 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:29:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-20 02:29:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 670. [2022-03-20 02:29:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 529 states have (on average 1.2627599243856333) internal successors, (668), 544 states have internal predecessors, (668), 70 states have call successors, (70), 49 states have call predecessors, (70), 70 states have return successors, (95), 85 states have call predecessors, (95), 65 states have call successors, (95) [2022-03-20 02:29:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 833 transitions. [2022-03-20 02:29:18,495 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 833 transitions. Word has length 69 [2022-03-20 02:29:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:18,495 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 833 transitions. [2022-03-20 02:29:18,495 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) [2022-03-20 02:29:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 833 transitions. [2022-03-20 02:29:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:29:18,496 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:18,496 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:18,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 02:29:18,496 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-03-20 02:29:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:18,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972942327] [2022-03-20 02:29:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972942327] [2022-03-20 02:29:18,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972942327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:18,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:18,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 02:29:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420590510] [2022-03-20 02:29:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:18,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:29:18,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:29:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:29:18,771 INFO L87 Difference]: Start difference. First operand 670 states and 833 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) [2022-03-20 02:29:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:20,302 INFO L93 Difference]: Finished difference Result 729 states and 918 transitions. [2022-03-20 02:29:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 02:29:20,302 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 [2022-03-20 02:29:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:20,304 INFO L225 Difference]: With dead ends: 729 [2022-03-20 02:29:20,304 INFO L226 Difference]: Without dead ends: 723 [2022-03-20 02:29:20,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-20 02:29:20,305 INFO L913 BasicCegarLoop]: 375 mSDtfsCounter, 1007 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 4033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:20,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 1633 Invalid, 4033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 3677 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 02:29:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-20 02:29:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 668. [2022-03-20 02:29:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 527 states have (on average 1.2599620493358634) internal successors, (664), 542 states have internal predecessors, (664), 70 states have call successors, (70), 49 states have call predecessors, (70), 70 states have return successors, (95), 85 states have call predecessors, (95), 65 states have call successors, (95) [2022-03-20 02:29:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 829 transitions. [2022-03-20 02:29:20,368 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 829 transitions. Word has length 69 [2022-03-20 02:29:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:20,368 INFO L478 AbstractCegarLoop]: Abstraction has 668 states and 829 transitions. [2022-03-20 02:29:20,368 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) [2022-03-20 02:29:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 829 transitions. [2022-03-20 02:29:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 02:29:20,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:20,369 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:20,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 02:29:20,369 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-03-20 02:29:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:20,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294515452] [2022-03-20 02:29:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294515452] [2022-03-20 02:29:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294515452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:20,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:20,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:20,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550460510] [2022-03-20 02:29:20,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:20,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:20,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:20,567 INFO L87 Difference]: Start difference. First operand 668 states and 829 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) [2022-03-20 02:29:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:22,124 INFO L93 Difference]: Finished difference Result 793 states and 1003 transitions. [2022-03-20 02:29:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:29:22,125 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 [2022-03-20 02:29:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:22,141 INFO L225 Difference]: With dead ends: 793 [2022-03-20 02:29:22,141 INFO L226 Difference]: Without dead ends: 731 [2022-03-20 02:29:22,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-03-20 02:29:22,141 INFO L913 BasicCegarLoop]: 435 mSDtfsCounter, 968 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:22,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 913 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:29:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-20 02:29:22,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 612. [2022-03-20 02:29:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 481 states have (on average 1.2536382536382535) internal successors, (603), 494 states have internal predecessors, (603), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (87), 77 states have call predecessors, (87), 63 states have call successors, (87) [2022-03-20 02:29:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 758 transitions. [2022-03-20 02:29:22,255 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 758 transitions. Word has length 69 [2022-03-20 02:29:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:22,255 INFO L478 AbstractCegarLoop]: Abstraction has 612 states and 758 transitions. [2022-03-20 02:29:22,255 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) [2022-03-20 02:29:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 758 transitions. [2022-03-20 02:29:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 02:29:22,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:22,268 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:22,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 02:29:22,268 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-03-20 02:29:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:22,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169924498] [2022-03-20 02:29:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:29:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:22,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:22,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169924498] [2022-03-20 02:29:22,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169924498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:22,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:22,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 02:29:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31368636] [2022-03-20 02:29:22,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:22,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 02:29:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 02:29:22,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:29:22,586 INFO L87 Difference]: Start difference. First operand 612 states and 758 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) [2022-03-20 02:29:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:25,179 INFO L93 Difference]: Finished difference Result 701 states and 885 transitions. [2022-03-20 02:29:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:29:25,180 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 [2022-03-20 02:29:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:25,181 INFO L225 Difference]: With dead ends: 701 [2022-03-20 02:29:25,181 INFO L226 Difference]: Without dead ends: 676 [2022-03-20 02:29:25,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 02:29:25,188 INFO L913 BasicCegarLoop]: 432 mSDtfsCounter, 490 mSDsluCounter, 2205 mSDsCounter, 0 mSdLazyCounter, 4848 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 2637 SdHoareTripleChecker+Invalid, 5035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:25,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 2637 Invalid, 5035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4848 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 02:29:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-20 02:29:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 610. [2022-03-20 02:29:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 480 states have (on average 1.2520833333333334) internal successors, (601), 493 states have internal predecessors, (601), 67 states have call successors, (67), 47 states have call predecessors, (67), 62 states have return successors, (86), 76 states have call predecessors, (86), 62 states have call successors, (86) [2022-03-20 02:29:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 754 transitions. [2022-03-20 02:29:25,306 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 754 transitions. Word has length 74 [2022-03-20 02:29:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:25,306 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 754 transitions. [2022-03-20 02:29:25,306 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) [2022-03-20 02:29:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 754 transitions. [2022-03-20 02:29:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 02:29:25,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:25,307 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:25,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 02:29:25,307 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-03-20 02:29:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:25,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893475780] [2022-03-20 02:29:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 02:29:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:25,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893475780] [2022-03-20 02:29:25,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893475780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:25,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:25,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 02:29:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965501800] [2022-03-20 02:29:25,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:25,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 02:29:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 02:29:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:29:25,636 INFO L87 Difference]: Start difference. First operand 610 states and 754 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) [2022-03-20 02:29:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:27,764 INFO L93 Difference]: Finished difference Result 698 states and 878 transitions. [2022-03-20 02:29:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:29:27,765 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 [2022-03-20 02:29:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:27,766 INFO L225 Difference]: With dead ends: 698 [2022-03-20 02:29:27,766 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 02:29:27,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 02:29:27,767 INFO L913 BasicCegarLoop]: 426 mSDtfsCounter, 493 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 3990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:27,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 2344 Invalid, 3990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:29:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 02:29:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 612. [2022-03-20 02:29:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 482 states have (on average 1.2448132780082988) internal successors, (600), 495 states have internal predecessors, (600), 67 states have call successors, (67), 47 states have call predecessors, (67), 62 states have return successors, (86), 76 states have call predecessors, (86), 62 states have call successors, (86) [2022-03-20 02:29:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 753 transitions. [2022-03-20 02:29:27,828 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 753 transitions. Word has length 71 [2022-03-20 02:29:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:27,829 INFO L478 AbstractCegarLoop]: Abstraction has 612 states and 753 transitions. [2022-03-20 02:29:27,829 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) [2022-03-20 02:29:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 753 transitions. [2022-03-20 02:29:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 02:29:27,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:27,830 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:27,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 02:29:27,830 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-03-20 02:29:27,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:27,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692362815] [2022-03-20 02:29:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:27,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 02:29:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692362815] [2022-03-20 02:29:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692362815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:28,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:29:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860589395] [2022-03-20 02:29:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:28,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:29:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:29:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:28,010 INFO L87 Difference]: Start difference. First operand 612 states and 753 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) [2022-03-20 02:29:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:29,218 INFO L93 Difference]: Finished difference Result 700 states and 867 transitions. [2022-03-20 02:29:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:29,219 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 [2022-03-20 02:29:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:29,221 INFO L225 Difference]: With dead ends: 700 [2022-03-20 02:29:29,221 INFO L226 Difference]: Without dead ends: 655 [2022-03-20 02:29:29,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:29:29,222 INFO L913 BasicCegarLoop]: 412 mSDtfsCounter, 440 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:29,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1224 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 02:29:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-20 02:29:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 605. [2022-03-20 02:29:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 476 states have (on average 1.245798319327731) internal successors, (593), 489 states have internal predecessors, (593), 66 states have call successors, (66), 47 states have call predecessors, (66), 62 states have return successors, (84), 75 states have call predecessors, (84), 61 states have call successors, (84) [2022-03-20 02:29:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 743 transitions. [2022-03-20 02:29:29,320 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 743 transitions. Word has length 71 [2022-03-20 02:29:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:29,320 INFO L478 AbstractCegarLoop]: Abstraction has 605 states and 743 transitions. [2022-03-20 02:29:29,320 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) [2022-03-20 02:29:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 743 transitions. [2022-03-20 02:29:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 02:29:29,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:29,322 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:29,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 02:29:29,322 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-03-20 02:29:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386879387] [2022-03-20 02:29:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:29,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 02:29:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:29,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:29,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386879387] [2022-03-20 02:29:29,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386879387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:29,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:29,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:29:29,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979157194] [2022-03-20 02:29:29,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:29,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:29:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:29:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:29,529 INFO L87 Difference]: Start difference. First operand 605 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) [2022-03-20 02:29:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:30,871 INFO L93 Difference]: Finished difference Result 693 states and 857 transitions. [2022-03-20 02:29:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:30,871 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 [2022-03-20 02:29:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:30,873 INFO L225 Difference]: With dead ends: 693 [2022-03-20 02:29:30,873 INFO L226 Difference]: Without dead ends: 649 [2022-03-20 02:29:30,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:29:30,874 INFO L913 BasicCegarLoop]: 404 mSDtfsCounter, 823 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:30,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1336 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 02:29:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-03-20 02:29:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 599. [2022-03-20 02:29:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.246284501061571) internal successors, (587), 484 states have internal predecessors, (587), 65 states have call successors, (65), 47 states have call predecessors, (65), 62 states have return successors, (83), 74 states have call predecessors, (83), 60 states have call successors, (83) [2022-03-20 02:29:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 735 transitions. [2022-03-20 02:29:30,940 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 735 transitions. Word has length 71 [2022-03-20 02:29:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:30,940 INFO L478 AbstractCegarLoop]: Abstraction has 599 states and 735 transitions. [2022-03-20 02:29:30,940 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) [2022-03-20 02:29:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 735 transitions. [2022-03-20 02:29:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 02:29:30,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:30,941 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:30,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 02:29:30,941 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-03-20 02:29:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:30,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515401449] [2022-03-20 02:29:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 02:29:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:31,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515401449] [2022-03-20 02:29:31,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515401449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:31,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:31,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:29:31,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233331107] [2022-03-20 02:29:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:31,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:29:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:29:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:31,160 INFO L87 Difference]: Start difference. First operand 599 states and 735 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) [2022-03-20 02:29:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:32,080 INFO L93 Difference]: Finished difference Result 687 states and 849 transitions. [2022-03-20 02:29:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:32,080 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 [2022-03-20 02:29:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:32,081 INFO L225 Difference]: With dead ends: 687 [2022-03-20 02:29:32,081 INFO L226 Difference]: Without dead ends: 637 [2022-03-20 02:29:32,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:29:32,082 INFO L913 BasicCegarLoop]: 395 mSDtfsCounter, 984 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:32,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1288 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 02:29:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-20 02:29:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 587. [2022-03-20 02:29:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 460 states have (on average 1.241304347826087) internal successors, (571), 473 states have internal predecessors, (571), 64 states have call successors, (64), 47 states have call predecessors, (64), 62 states have return successors, (82), 73 states have call predecessors, (82), 59 states have call successors, (82) [2022-03-20 02:29:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 717 transitions. [2022-03-20 02:29:32,169 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 717 transitions. Word has length 73 [2022-03-20 02:29:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:32,170 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 717 transitions. [2022-03-20 02:29:32,170 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) [2022-03-20 02:29:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 717 transitions. [2022-03-20 02:29:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 02:29:32,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:32,172 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:32,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 02:29:32,173 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-03-20 02:29:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:32,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272950778] [2022-03-20 02:29:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 02:29:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272950778] [2022-03-20 02:29:32,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272950778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:32,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:32,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:29:32,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477555089] [2022-03-20 02:29:32,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:32,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:29:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:29:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:32,484 INFO L87 Difference]: Start difference. First operand 587 states and 717 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) [2022-03-20 02:29:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:36,115 INFO L93 Difference]: Finished difference Result 1357 states and 1680 transitions. [2022-03-20 02:29:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 02:29:36,115 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 [2022-03-20 02:29:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:36,118 INFO L225 Difference]: With dead ends: 1357 [2022-03-20 02:29:36,118 INFO L226 Difference]: Without dead ends: 1212 [2022-03-20 02:29:36,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 02:29:36,119 INFO L913 BasicCegarLoop]: 391 mSDtfsCounter, 2921 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 4195 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2925 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 5167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 4195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:36,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2925 Valid, 1292 Invalid, 5167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 4195 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 02:29:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-03-20 02:29:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 904. [2022-03-20 02:29:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 713 states have (on average 1.2650771388499298) internal successors, (902), 734 states have internal predecessors, (902), 95 states have call successors, (95), 74 states have call predecessors, (95), 95 states have return successors, (126), 102 states have call predecessors, (126), 90 states have call successors, (126) [2022-03-20 02:29:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1123 transitions. [2022-03-20 02:29:36,250 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1123 transitions. Word has length 73 [2022-03-20 02:29:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:36,250 INFO L478 AbstractCegarLoop]: Abstraction has 904 states and 1123 transitions. [2022-03-20 02:29:36,250 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) [2022-03-20 02:29:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1123 transitions. [2022-03-20 02:29:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 02:29:36,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:36,252 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:36,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 02:29:36,252 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-03-20 02:29:36,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612583221] [2022-03-20 02:29:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:36,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 02:29:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612583221] [2022-03-20 02:29:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612583221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:36,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:36,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 02:29:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283089864] [2022-03-20 02:29:36,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:36,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 02:29:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 02:29:36,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:29:36,465 INFO L87 Difference]: Start difference. First operand 904 states and 1123 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) [2022-03-20 02:29:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:38,505 INFO L93 Difference]: Finished difference Result 1261 states and 1565 transitions. [2022-03-20 02:29:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:29:38,505 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 [2022-03-20 02:29:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:38,508 INFO L225 Difference]: With dead ends: 1261 [2022-03-20 02:29:38,508 INFO L226 Difference]: Without dead ends: 1156 [2022-03-20 02:29:38,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-03-20 02:29:38,509 INFO L913 BasicCegarLoop]: 654 mSDtfsCounter, 2833 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2837 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:38,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2837 Valid, 1262 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 02:29:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-20 02:29:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 997. [2022-03-20 02:29:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 786 states have (on average 1.251908396946565) internal successors, (984), 802 states have internal predecessors, (984), 109 states have call successors, (109), 78 states have call predecessors, (109), 101 states have return successors, (142), 121 states have call predecessors, (142), 104 states have call successors, (142) [2022-03-20 02:29:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1235 transitions. [2022-03-20 02:29:38,630 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1235 transitions. Word has length 73 [2022-03-20 02:29:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:38,630 INFO L478 AbstractCegarLoop]: Abstraction has 997 states and 1235 transitions. [2022-03-20 02:29:38,631 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) [2022-03-20 02:29:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1235 transitions. [2022-03-20 02:29:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 02:29:38,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:38,632 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:38,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 02:29:38,632 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-03-20 02:29:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295526583] [2022-03-20 02:29:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:29:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:29:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295526583] [2022-03-20 02:29:38,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295526583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:38,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:38,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 02:29:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316723304] [2022-03-20 02:29:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:38,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:29:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:29:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:38,964 INFO L87 Difference]: Start difference. First operand 997 states and 1235 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) [2022-03-20 02:29:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:40,577 INFO L93 Difference]: Finished difference Result 1148 states and 1437 transitions. [2022-03-20 02:29:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:29:40,577 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 [2022-03-20 02:29:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:40,580 INFO L225 Difference]: With dead ends: 1148 [2022-03-20 02:29:40,580 INFO L226 Difference]: Without dead ends: 1063 [2022-03-20 02:29:40,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:40,581 INFO L913 BasicCegarLoop]: 381 mSDtfsCounter, 375 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:40,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 1433 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 02:29:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-03-20 02:29:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 979. [2022-03-20 02:29:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 772 states have (on average 1.2512953367875648) internal successors, (966), 788 states have internal predecessors, (966), 105 states have call successors, (105), 78 states have call predecessors, (105), 101 states have return successors, (136), 117 states have call predecessors, (136), 100 states have call successors, (136) [2022-03-20 02:29:40,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1207 transitions. [2022-03-20 02:29:40,764 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1207 transitions. Word has length 75 [2022-03-20 02:29:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:40,764 INFO L478 AbstractCegarLoop]: Abstraction has 979 states and 1207 transitions. [2022-03-20 02:29:40,764 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) [2022-03-20 02:29:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1207 transitions. [2022-03-20 02:29:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 02:29:40,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:40,766 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:40,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 02:29:40,766 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-03-20 02:29:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:40,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618400672] [2022-03-20 02:29:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 02:29:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 02:29:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:40,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618400672] [2022-03-20 02:29:40,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618400672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:40,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:40,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789886024] [2022-03-20 02:29:40,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:40,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:40,910 INFO L87 Difference]: Start difference. First operand 979 states and 1207 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) [2022-03-20 02:29:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:41,851 INFO L93 Difference]: Finished difference Result 1108 states and 1381 transitions. [2022-03-20 02:29:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:41,858 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 [2022-03-20 02:29:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:41,861 INFO L225 Difference]: With dead ends: 1108 [2022-03-20 02:29:41,861 INFO L226 Difference]: Without dead ends: 1047 [2022-03-20 02:29:41,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:41,862 INFO L913 BasicCegarLoop]: 368 mSDtfsCounter, 357 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:41,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 1014 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 02:29:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-20 02:29:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 963. [2022-03-20 02:29:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 758 states have (on average 1.2506596306068603) internal successors, (948), 774 states have internal predecessors, (948), 103 states have call successors, (103), 78 states have call predecessors, (103), 101 states have return successors, (132), 115 states have call predecessors, (132), 98 states have call successors, (132) [2022-03-20 02:29:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1183 transitions. [2022-03-20 02:29:42,028 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1183 transitions. Word has length 73 [2022-03-20 02:29:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:42,028 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1183 transitions. [2022-03-20 02:29:42,028 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) [2022-03-20 02:29:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1183 transitions. [2022-03-20 02:29:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 02:29:42,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:42,030 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:42,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 02:29:42,031 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-03-20 02:29:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198323134] [2022-03-20 02:29:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 02:29:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 02:29:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:42,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:42,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198323134] [2022-03-20 02:29:42,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198323134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:42,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:29:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318982671] [2022-03-20 02:29:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:42,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:29:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:29:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:42,269 INFO L87 Difference]: Start difference. First operand 963 states and 1183 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) [2022-03-20 02:29:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:43,307 INFO L93 Difference]: Finished difference Result 1407 states and 1780 transitions. [2022-03-20 02:29:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 02:29:43,308 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 [2022-03-20 02:29:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:43,309 INFO L225 Difference]: With dead ends: 1407 [2022-03-20 02:29:43,310 INFO L226 Difference]: Without dead ends: 1033 [2022-03-20 02:29:43,310 INFO L912 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 [2022-03-20 02:29:43,310 INFO L913 BasicCegarLoop]: 360 mSDtfsCounter, 757 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:43,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1356 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 02:29:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-20 02:29:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 949. [2022-03-20 02:29:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 744 states have (on average 1.2446236559139785) internal successors, (926), 760 states have internal predecessors, (926), 103 states have call successors, (103), 78 states have call predecessors, (103), 101 states have return successors, (132), 115 states have call predecessors, (132), 98 states have call successors, (132) [2022-03-20 02:29:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1161 transitions. [2022-03-20 02:29:43,421 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1161 transitions. Word has length 77 [2022-03-20 02:29:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:43,421 INFO L478 AbstractCegarLoop]: Abstraction has 949 states and 1161 transitions. [2022-03-20 02:29:43,422 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) [2022-03-20 02:29:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1161 transitions. [2022-03-20 02:29:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 02:29:43,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:43,423 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:43,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 02:29:43,423 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-03-20 02:29:43,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:43,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542892735] [2022-03-20 02:29:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 02:29:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 02:29:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 02:29:43,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542892735] [2022-03-20 02:29:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542892735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:43,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:43,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331600630] [2022-03-20 02:29:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:43,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:43,643 INFO L87 Difference]: Start difference. First operand 949 states and 1161 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) [2022-03-20 02:29:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:44,793 INFO L93 Difference]: Finished difference Result 1078 states and 1335 transitions. [2022-03-20 02:29:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:44,793 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 [2022-03-20 02:29:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:44,795 INFO L225 Difference]: With dead ends: 1078 [2022-03-20 02:29:44,795 INFO L226 Difference]: Without dead ends: 1013 [2022-03-20 02:29:44,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:44,797 INFO L913 BasicCegarLoop]: 361 mSDtfsCounter, 335 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:44,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1007 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 02:29:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-20 02:29:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 929. [2022-03-20 02:29:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 728 states have (on average 1.2445054945054945) internal successors, (906), 744 states have internal predecessors, (906), 99 states have call successors, (99), 78 states have call predecessors, (99), 101 states have return successors, (128), 111 states have call predecessors, (128), 94 states have call successors, (128) [2022-03-20 02:29:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1133 transitions. [2022-03-20 02:29:44,939 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1133 transitions. Word has length 75 [2022-03-20 02:29:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:44,940 INFO L478 AbstractCegarLoop]: Abstraction has 929 states and 1133 transitions. [2022-03-20 02:29:44,940 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) [2022-03-20 02:29:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1133 transitions. [2022-03-20 02:29:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 02:29:44,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:44,942 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:44,942 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 02:29:44,942 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 429467168, now seen corresponding path program 1 times [2022-03-20 02:29:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:44,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999292958] [2022-03-20 02:29:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 02:29:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999292958] [2022-03-20 02:29:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999292958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:45,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:45,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 02:29:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218488801] [2022-03-20 02:29:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:45,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 02:29:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 02:29:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 02:29:45,168 INFO L87 Difference]: Start difference. First operand 929 states and 1133 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 5 states have internal predecessors, (59), 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) [2022-03-20 02:29:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:45,929 INFO L93 Difference]: Finished difference Result 1052 states and 1291 transitions. [2022-03-20 02:29:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:29:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 5 states have internal predecessors, (59), 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 79 [2022-03-20 02:29:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:45,931 INFO L225 Difference]: With dead ends: 1052 [2022-03-20 02:29:45,931 INFO L226 Difference]: Without dead ends: 983 [2022-03-20 02:29:45,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:45,932 INFO L913 BasicCegarLoop]: 335 mSDtfsCounter, 454 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:45,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 1355 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 02:29:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-20 02:29:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 913. [2022-03-20 02:29:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 714 states have (on average 1.2352941176470589) internal successors, (882), 730 states have internal predecessors, (882), 97 states have call successors, (97), 78 states have call predecessors, (97), 101 states have return successors, (126), 109 states have call predecessors, (126), 92 states have call successors, (126) [2022-03-20 02:29:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1105 transitions. [2022-03-20 02:29:46,035 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1105 transitions. Word has length 79 [2022-03-20 02:29:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:46,035 INFO L478 AbstractCegarLoop]: Abstraction has 913 states and 1105 transitions. [2022-03-20 02:29:46,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 5 states have internal predecessors, (59), 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) [2022-03-20 02:29:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1105 transitions. [2022-03-20 02:29:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 02:29:46,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:46,036 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:46,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 02:29:46,036 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-03-20 02:29:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114195591] [2022-03-20 02:29:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 02:29:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114195591] [2022-03-20 02:29:46,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114195591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:46,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:46,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 02:29:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781944865] [2022-03-20 02:29:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:46,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 02:29:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 02:29:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 02:29:46,285 INFO L87 Difference]: Start difference. First operand 913 states and 1105 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) [2022-03-20 02:29:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:47,614 INFO L93 Difference]: Finished difference Result 1005 states and 1228 transitions. [2022-03-20 02:29:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 02:29:47,614 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 [2022-03-20 02:29:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:47,616 INFO L225 Difference]: With dead ends: 1005 [2022-03-20 02:29:47,617 INFO L226 Difference]: Without dead ends: 913 [2022-03-20 02:29:47,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 02:29:47,617 INFO L913 BasicCegarLoop]: 343 mSDtfsCounter, 184 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:47,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 2131 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 02:29:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-03-20 02:29:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 861. [2022-03-20 02:29:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 676 states have (on average 1.242603550295858) internal successors, (840), 692 states have internal predecessors, (840), 87 states have call successors, (87), 74 states have call predecessors, (87), 97 states have return successors, (114), 99 states have call predecessors, (114), 82 states have call successors, (114) [2022-03-20 02:29:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1041 transitions. [2022-03-20 02:29:47,729 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1041 transitions. Word has length 77 [2022-03-20 02:29:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:47,729 INFO L478 AbstractCegarLoop]: Abstraction has 861 states and 1041 transitions. [2022-03-20 02:29:47,729 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) [2022-03-20 02:29:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1041 transitions. [2022-03-20 02:29:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 02:29:47,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:47,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:47,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 02:29:47,731 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-03-20 02:29:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:47,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061566510] [2022-03-20 02:29:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 02:29:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 02:29:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 02:29:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 02:29:47,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061566510] [2022-03-20 02:29:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061566510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 02:29:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293228791] [2022-03-20 02:29:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:29:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:29:47,916 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) [2022-03-20 02:29:47,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 02:29:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 02:29:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:29:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:48,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:29:48,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293228791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:48,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:29:48,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2022-03-20 02:29:48,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213988301] [2022-03-20 02:29:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:48,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:29:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:29:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:48,281 INFO L87 Difference]: Start difference. First operand 861 states and 1041 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-03-20 02:29:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:48,396 INFO L93 Difference]: Finished difference Result 895 states and 1073 transitions. [2022-03-20 02:29:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:29:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 [2022-03-20 02:29:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:48,398 INFO L225 Difference]: With dead ends: 895 [2022-03-20 02:29:48,398 INFO L226 Difference]: Without dead ends: 800 [2022-03-20 02:29:48,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:48,400 INFO L913 BasicCegarLoop]: 296 mSDtfsCounter, 0 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:48,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1180 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:29:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-03-20 02:29:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2022-03-20 02:29:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 630 states have (on average 1.2507936507936508) internal successors, (788), 643 states have internal predecessors, (788), 81 states have call successors, (81), 71 states have call predecessors, (81), 88 states have return successors, (102), 90 states have call predecessors, (102), 76 states have call successors, (102) [2022-03-20 02:29:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 971 transitions. [2022-03-20 02:29:48,479 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 971 transitions. Word has length 77 [2022-03-20 02:29:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:48,479 INFO L478 AbstractCegarLoop]: Abstraction has 800 states and 971 transitions. [2022-03-20 02:29:48,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-03-20 02:29:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 971 transitions. [2022-03-20 02:29:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 02:29:48,480 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:48,480 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:48,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 02:29:48,699 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,SelfDestructingSolverStorable66 [2022-03-20 02:29:48,700 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-03-20 02:29:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552607883] [2022-03-20 02:29:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 02:29:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 02:29:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:48,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552607883] [2022-03-20 02:29:48,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552607883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:48,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:48,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 02:29:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190579850] [2022-03-20 02:29:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:48,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 02:29:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 02:29:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 02:29:48,938 INFO L87 Difference]: Start difference. First operand 800 states and 971 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) [2022-03-20 02:29:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:49,734 INFO L93 Difference]: Finished difference Result 1212 states and 1516 transitions. [2022-03-20 02:29:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 02:29:49,735 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 [2022-03-20 02:29:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:49,736 INFO L225 Difference]: With dead ends: 1212 [2022-03-20 02:29:49,736 INFO L226 Difference]: Without dead ends: 852 [2022-03-20 02:29:49,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-20 02:29:49,739 INFO L913 BasicCegarLoop]: 275 mSDtfsCounter, 570 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:49,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 734 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 02:29:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-03-20 02:29:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 800. [2022-03-20 02:29:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 630 states have (on average 1.2476190476190476) internal successors, (786), 643 states have internal predecessors, (786), 81 states have call successors, (81), 71 states have call predecessors, (81), 88 states have return successors, (102), 90 states have call predecessors, (102), 76 states have call successors, (102) [2022-03-20 02:29:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 969 transitions. [2022-03-20 02:29:49,824 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 969 transitions. Word has length 81 [2022-03-20 02:29:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:49,825 INFO L478 AbstractCegarLoop]: Abstraction has 800 states and 969 transitions. [2022-03-20 02:29:49,825 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) [2022-03-20 02:29:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 969 transitions. [2022-03-20 02:29:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 02:29:49,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:49,826 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:49,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 02:29:49,828 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-03-20 02:29:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832311704] [2022-03-20 02:29:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:49,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:49,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:49,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 02:29:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:50,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:50,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:50,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832311704] [2022-03-20 02:29:50,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832311704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:50,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:50,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 02:29:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648681903] [2022-03-20 02:29:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:50,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:29:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:29:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:29:50,170 INFO L87 Difference]: Start difference. First operand 800 states and 969 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) [2022-03-20 02:29:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:52,427 INFO L93 Difference]: Finished difference Result 897 states and 1088 transitions. [2022-03-20 02:29:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 02:29:52,428 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 [2022-03-20 02:29:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:52,429 INFO L225 Difference]: With dead ends: 897 [2022-03-20 02:29:52,429 INFO L226 Difference]: Without dead ends: 764 [2022-03-20 02:29:52,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 02:29:52,434 INFO L913 BasicCegarLoop]: 453 mSDtfsCounter, 554 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 3687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:52,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 1763 Invalid, 3687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 02:29:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-20 02:29:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 365. [2022-03-20 02:29:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 287 states have (on average 1.2473867595818815) internal successors, (358), 292 states have internal predecessors, (358), 39 states have call successors, (39), 35 states have call predecessors, (39), 38 states have return successors, (44), 39 states have call predecessors, (44), 35 states have call successors, (44) [2022-03-20 02:29:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 441 transitions. [2022-03-20 02:29:52,497 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 441 transitions. Word has length 78 [2022-03-20 02:29:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:52,498 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 441 transitions. [2022-03-20 02:29:52,498 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) [2022-03-20 02:29:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 441 transitions. [2022-03-20 02:29:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 02:29:52,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:52,499 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:52,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 02:29:52,499 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-03-20 02:29:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823036331] [2022-03-20 02:29:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 02:29:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 02:29:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 02:29:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 02:29:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:52,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:52,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823036331] [2022-03-20 02:29:52,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823036331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:52,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:52,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 02:29:52,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360484337] [2022-03-20 02:29:52,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:52,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 02:29:52,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 02:29:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:29:52,807 INFO L87 Difference]: Start difference. First operand 365 states and 441 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) [2022-03-20 02:29:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:53,696 INFO L93 Difference]: Finished difference Result 393 states and 479 transitions. [2022-03-20 02:29:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 02:29:53,696 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 [2022-03-20 02:29:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:53,702 INFO L225 Difference]: With dead ends: 393 [2022-03-20 02:29:53,702 INFO L226 Difference]: Without dead ends: 305 [2022-03-20 02:29:53,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-20 02:29:53,703 INFO L913 BasicCegarLoop]: 237 mSDtfsCounter, 380 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:53,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1719 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 02:29:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-20 02:29:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 288. [2022-03-20 02:29:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 224 states have (on average 1.2678571428571428) internal successors, (284), 227 states have internal predecessors, (284), 31 states have call successors, (31), 29 states have call predecessors, (31), 32 states have return successors, (37), 32 states have call predecessors, (37), 28 states have call successors, (37) [2022-03-20 02:29:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2022-03-20 02:29:53,777 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 79 [2022-03-20 02:29:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:53,777 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2022-03-20 02:29:53,777 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) [2022-03-20 02:29:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2022-03-20 02:29:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 02:29:53,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:53,778 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:53,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 02:29:53,778 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-03-20 02:29:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:53,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266516376] [2022-03-20 02:29:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 02:29:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:53,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:53,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266516376] [2022-03-20 02:29:53,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266516376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:53,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:53,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 02:29:53,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727208835] [2022-03-20 02:29:53,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:53,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 02:29:53,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 02:29:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-20 02:29:53,979 INFO L87 Difference]: Start difference. First operand 288 states and 352 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) [2022-03-20 02:29:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:54,579 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2022-03-20 02:29:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 02:29:54,580 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 [2022-03-20 02:29:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:54,581 INFO L225 Difference]: With dead ends: 438 [2022-03-20 02:29:54,581 INFO L226 Difference]: Without dead ends: 296 [2022-03-20 02:29:54,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:54,581 INFO L913 BasicCegarLoop]: 221 mSDtfsCounter, 139 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:54,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 645 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 02:29:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-20 02:29:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 246. [2022-03-20 02:29:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 193 states have internal predecessors, (225), 29 states have call successors, (29), 26 states have call predecessors, (29), 27 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2022-03-20 02:29:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2022-03-20 02:29:54,650 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 83 [2022-03-20 02:29:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:54,650 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2022-03-20 02:29:54,650 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) [2022-03-20 02:29:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2022-03-20 02:29:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 02:29:54,651 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:54,651 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:54,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 02:29:54,651 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-03-20 02:29:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972197594] [2022-03-20 02:29:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-20 02:29:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:55,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972197594] [2022-03-20 02:29:55,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972197594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:55,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:55,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 02:29:55,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127773831] [2022-03-20 02:29:55,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:55,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:29:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:29:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:29:55,155 INFO L87 Difference]: Start difference. First operand 246 states and 284 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) [2022-03-20 02:29:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:55,730 INFO L93 Difference]: Finished difference Result 304 states and 347 transitions. [2022-03-20 02:29:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 02:29:55,731 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 [2022-03-20 02:29:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:55,731 INFO L225 Difference]: With dead ends: 304 [2022-03-20 02:29:55,731 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 02:29:55,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-03-20 02:29:55,732 INFO L913 BasicCegarLoop]: 172 mSDtfsCounter, 397 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:55,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1143 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 02:29:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 02:29:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2022-03-20 02:29:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 188 states have (on average 1.175531914893617) internal successors, (221), 192 states have internal predecessors, (221), 29 states have call successors, (29), 26 states have call predecessors, (29), 27 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2022-03-20 02:29:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 280 transitions. [2022-03-20 02:29:55,775 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 280 transitions. Word has length 99 [2022-03-20 02:29:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:55,776 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 280 transitions. [2022-03-20 02:29:55,776 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) [2022-03-20 02:29:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 280 transitions. [2022-03-20 02:29:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 02:29:55,776 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:55,777 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:55,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 02:29:55,777 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-03-20 02:29:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986199475] [2022-03-20 02:29:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:55,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-20 02:29:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:56,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986199475] [2022-03-20 02:29:56,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986199475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:56,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:56,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 02:29:56,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151727284] [2022-03-20 02:29:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:56,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 02:29:56,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 02:29:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:56,081 INFO L87 Difference]: Start difference. First operand 245 states and 280 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) [2022-03-20 02:29:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:57,485 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2022-03-20 02:29:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 02:29:57,485 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 [2022-03-20 02:29:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:57,486 INFO L225 Difference]: With dead ends: 542 [2022-03-20 02:29:57,486 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 02:29:57,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 02:29:57,487 INFO L913 BasicCegarLoop]: 278 mSDtfsCounter, 957 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:57,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 1033 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 02:29:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 02:29:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 360. [2022-03-20 02:29:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 278 states have (on average 1.169064748201439) internal successors, (325), 284 states have internal predecessors, (325), 41 states have call successors, (41), 38 states have call predecessors, (41), 40 states have return successors, (43), 38 states have call predecessors, (43), 39 states have call successors, (43) [2022-03-20 02:29:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 409 transitions. [2022-03-20 02:29:57,551 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 409 transitions. Word has length 101 [2022-03-20 02:29:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:57,551 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 409 transitions. [2022-03-20 02:29:57,551 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) [2022-03-20 02:29:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 409 transitions. [2022-03-20 02:29:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 02:29:57,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:57,552 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:57,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 02:29:57,552 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:57,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-03-20 02:29:57,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:57,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547762630] [2022-03-20 02:29:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 02:29:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-20 02:29:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:29:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547762630] [2022-03-20 02:29:57,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547762630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:57,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:57,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 02:29:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525557719] [2022-03-20 02:29:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:57,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 02:29:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 02:29:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-20 02:29:57,773 INFO L87 Difference]: Start difference. First operand 360 states and 409 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) [2022-03-20 02:29:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:58,210 INFO L93 Difference]: Finished difference Result 401 states and 458 transitions. [2022-03-20 02:29:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 02:29:58,211 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 [2022-03-20 02:29:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:58,212 INFO L225 Difference]: With dead ends: 401 [2022-03-20 02:29:58,212 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 02:29:58,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:58,213 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 251 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:58,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1148 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 02:29:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 02:29:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 146. [2022-03-20 02:29:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 114 states have internal predecessors, (128), 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) [2022-03-20 02:29:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-20 02:29:58,241 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 101 [2022-03-20 02:29:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:58,241 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-20 02:29:58,242 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) [2022-03-20 02:29:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-20 02:29:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 02:29:58,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:58,242 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:58,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 02:29:58,242 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1479874137, now seen corresponding path program 1 times [2022-03-20 02:29:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:58,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262749742] [2022-03-20 02:29:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 02:29:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 02:29:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 02:29:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262749742] [2022-03-20 02:29:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262749742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:58,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 02:29:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503028553] [2022-03-20 02:29:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:58,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 02:29:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 02:29:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-20 02:29:58,452 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 02:29:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:29:58,894 INFO L93 Difference]: Finished difference Result 275 states and 311 transitions. [2022-03-20 02:29:58,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:29:58,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-20 02:29:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:29:58,895 INFO L225 Difference]: With dead ends: 275 [2022-03-20 02:29:58,895 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 02:29:58,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-03-20 02:29:58,896 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 264 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 02:29:58,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 422 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 02:29:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 02:29:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-03-20 02:29:58,947 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) [2022-03-20 02:29:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-03-20 02:29:58,947 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 115 [2022-03-20 02:29:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:29:58,948 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-03-20 02:29:58,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 02:29:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-03-20 02:29:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 02:29:58,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:29:58,948 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:29:58,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 02:29:58,949 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:29:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:29:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-03-20 02:29:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:29:58,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097978172] [2022-03-20 02:29:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:29:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:29:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:29:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:29:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:29:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:29:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 02:29:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:29:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:29:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:29:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:29:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-20 02:29:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 02:29:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:29:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 02:29:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:29:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097978172] [2022-03-20 02:29:59,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097978172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:29:59,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:29:59,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 02:29:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680722199] [2022-03-20 02:29:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:29:59,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 02:29:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:29:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 02:29:59,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 02:29:59,192 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) [2022-03-20 02:30:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:30:00,043 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-03-20 02:30:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 02:30:00,044 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 [2022-03-20 02:30:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:30:00,045 INFO L225 Difference]: With dead ends: 292 [2022-03-20 02:30:00,045 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 02:30:00,045 INFO L912 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 [2022-03-20 02:30:00,046 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 480 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 02:30:00,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 409 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 02:30:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 02:30:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-20 02:30:00,089 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) [2022-03-20 02:30:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-03-20 02:30:00,090 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-03-20 02:30:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:30:00,090 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-03-20 02:30:00,090 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) [2022-03-20 02:30:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-03-20 02:30:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 02:30:00,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:30:00,091 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:30:00,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 02:30:00,091 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:30:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:30:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-03-20 02:30:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:30:00,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722040613] [2022-03-20 02:30:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:30:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:30:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:30:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 02:30:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 02:30:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 02:30:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:30:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 02:30:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:30:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 02:30:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 02:30:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 02:30:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 02:30:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-20 02:30:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 02:30:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:30:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 02:30:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:30:00,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722040613] [2022-03-20 02:30:00,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722040613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:30:00,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:30:00,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 02:30:00,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620229136] [2022-03-20 02:30:00,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:30:00,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 02:30:00,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:30:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 02:30:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-20 02:30:00,380 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) [2022-03-20 02:30:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:30:00,925 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-03-20 02:30:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 02:30:00,926 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 [2022-03-20 02:30:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:30:00,926 INFO L225 Difference]: With dead ends: 152 [2022-03-20 02:30:00,926 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 02:30:00,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-03-20 02:30:00,927 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 326 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 02:30:00,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 348 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 02:30:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 02:30:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 02:30:00,927 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) [2022-03-20 02:30:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 02:30:00,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-20 02:30:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:30:00,928 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 02:30:00,928 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) [2022-03-20 02:30:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 02:30:00,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 02:30:00,930 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 02:30:00,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-20 02:30:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.