/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 23:36:24,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 23:36:24,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 23:36:24,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 23:36:24,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 23:36:24,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 23:36:24,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 23:36:24,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 23:36:24,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 23:36:24,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 23:36:24,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 23:36:24,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 23:36:24,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 23:36:24,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 23:36:24,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 23:36:24,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 23:36:24,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 23:36:24,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 23:36:24,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 23:36:24,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 23:36:24,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 23:36:24,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 23:36:24,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 23:36:24,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 23:36:24,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 23:36:24,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 23:36:24,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 23:36:24,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 23:36:24,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 23:36:24,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 23:36:24,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 23:36:24,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 23:36:24,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 23:36:24,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 23:36:24,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 23:36:24,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:36:24,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 23:36:24,875 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 23:36:25,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 23:36:25,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 23:36:25,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 23:36:25,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 23:36:25,047 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 23:36:25,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-03-20 23:36:25,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41442ea44/f7250b4e3aa84b368b39fad0dbe4cf6b/FLAGa7ca4e1cc [2022-03-20 23:36:25,503 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 23:36:25,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2022-03-20 23:36:25,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41442ea44/f7250b4e3aa84b368b39fad0dbe4cf6b/FLAGa7ca4e1cc [2022-03-20 23:36:25,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41442ea44/f7250b4e3aa84b368b39fad0dbe4cf6b [2022-03-20 23:36:25,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 23:36:25,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 23:36:25,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 23:36:25,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 23:36:25,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 23:36:25,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:25,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1614b040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25, skipping insertion in model container [2022-03-20 23:36:25,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:25,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 23:36:25,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 23:36:25,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-03-20 23:36:25,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:36:25,847 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 23:36:25,856 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-1.c[2074,2087] [2022-03-20 23:36:25,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:36:25,959 INFO L208 MainTranslator]: Completed translation [2022-03-20 23:36:25,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25 WrapperNode [2022-03-20 23:36:25,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 23:36:25,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 23:36:25,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 23:36:25,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 23:36:25,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:25,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:25,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:25,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:26,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:26,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:26,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:26,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 23:36:26,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 23:36:26,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 23:36:26,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 23:36:26,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (1/1) ... [2022-03-20 23:36:26,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:36:26,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:36:26,081 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 23:36:26,095 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 23:36:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 23:36:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 23:36:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-03-20 23:36:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-03-20 23:36:26,121 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-03-20 23:36:26,121 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-03-20 23:36:26,121 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-03-20 23:36:26,122 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-20 23:36:26,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-03-20 23:36:26,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 23:36:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-03-20 23:36:26,125 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-20 23:36:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-20 23:36:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 23:36:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 23:36:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 23:36:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 23:36:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 23:36:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 23:36:26,305 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 23:36:26,307 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 23:36:26,421 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,467 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-03-20 23:36:26,467 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-03-20 23:36:26,470 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,507 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-03-20 23:36:26,508 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-03-20 23:36:26,522 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,544 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-20 23:36:26,544 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-20 23:36:26,616 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,653 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-03-20 23:36:26,653 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-03-20 23:36:26,653 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-03-20 23:36:26,659 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,810 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-03-20 23:36:26,810 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-03-20 23:36:26,811 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,835 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-20 23:36:26,835 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-20 23:36:26,855 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,867 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-03-20 23:36:26,867 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-03-20 23:36:26,869 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,962 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-03-20 23:36:26,962 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-03-20 23:36:26,969 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:36:26,972 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:36:26,972 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:36:26,980 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 23:36:26,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 23:36:26,987 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 23:36:26,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:36:26 BoogieIcfgContainer [2022-03-20 23:36:26,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 23:36:26,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 23:36:26,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 23:36:26,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 23:36:26,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:36:25" (1/3) ... [2022-03-20 23:36:26,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d44528d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:36:26, skipping insertion in model container [2022-03-20 23:36:26,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:36:25" (2/3) ... [2022-03-20 23:36:26,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d44528d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:36:26, skipping insertion in model container [2022-03-20 23:36:26,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:36:26" (3/3) ... [2022-03-20 23:36:26,995 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2022-03-20 23:36:26,998 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 23:36:26,998 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 23:36:27,027 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 23:36:27,031 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 23:36:27,032 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 23:36:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 23:36:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 23:36:27,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:27,074 INFO 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 23:36:27,080 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 1 times [2022-03-20 23:36:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134283691] [2022-03-20 23:36:27,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1971492104, now seen corresponding path program 2 times [2022-03-20 23:36:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:27,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534828818] [2022-03-20 23:36:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:27,375 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 23:36:27,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534828818] [2022-03-20 23:36:27,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534828818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:27,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:27,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:36:27,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:27,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134283691] [2022-03-20 23:36:27,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134283691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:27,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:36:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353137903] [2022-03-20 23:36:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:27,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 23:36:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 23:36:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 23:36:27,407 INFO L87 Difference]: Start difference. First operand has 517 states, 383 states have (on average 1.4882506527415145) internal successors, (570), 404 states have internal predecessors, (570), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 23:36:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:29,302 INFO L93 Difference]: Finished difference Result 1047 states and 1683 transitions. [2022-03-20 23:36:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:36:29,304 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 23:36:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:29,314 INFO L225 Difference]: With dead ends: 1047 [2022-03-20 23:36:29,315 INFO L226 Difference]: Without dead ends: 665 [2022-03-20 23:36:29,319 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 23:36:29,322 INFO L913 BasicCegarLoop]: 741 mSDtfsCounter, 399 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:29,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1013 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 23:36:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-20 23:36:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2022-03-20 23:36:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 378 states have (on average 1.4576719576719577) internal successors, (551), 397 states have internal predecessors, (551), 103 states have call successors, (103), 29 states have call predecessors, (103), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-20 23:36:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 740 transitions. [2022-03-20 23:36:29,402 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 740 transitions. Word has length 20 [2022-03-20 23:36:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:29,402 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 740 transitions. [2022-03-20 23:36:29,402 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 23:36:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 740 transitions. [2022-03-20 23:36:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 23:36:29,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:29,403 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 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 23:36:29,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 23:36:29,404 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 1 times [2022-03-20 23:36:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [894811053] [2022-03-20 23:36:29,405 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1335659000, now seen corresponding path program 2 times [2022-03-20 23:36:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419585755] [2022-03-20 23:36:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:29,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:29,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:29,560 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 23:36:29,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:29,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419585755] [2022-03-20 23:36:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419585755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:29,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:29,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:29,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [894811053] [2022-03-20 23:36:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [894811053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:29,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:29,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275897913] [2022-03-20 23:36:29,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:29,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:36:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:36:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:36:29,563 INFO L87 Difference]: Start difference. First operand 509 states and 740 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:30,977 INFO L93 Difference]: Finished difference Result 967 states and 1429 transitions. [2022-03-20 23:36:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:36:30,978 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 23:36:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:30,983 INFO L225 Difference]: With dead ends: 967 [2022-03-20 23:36:30,983 INFO L226 Difference]: Without dead ends: 846 [2022-03-20 23:36:30,983 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 23:36:30,984 INFO L913 BasicCegarLoop]: 839 mSDtfsCounter, 1498 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:30,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1011 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:36:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-03-20 23:36:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 664. [2022-03-20 23:36:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 502 states have (on average 1.408366533864542) internal successors, (707), 510 states have internal predecessors, (707), 112 states have call successors, (112), 40 states have call predecessors, (112), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-03-20 23:36:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 964 transitions. [2022-03-20 23:36:31,043 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 964 transitions. Word has length 25 [2022-03-20 23:36:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:31,044 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 964 transitions. [2022-03-20 23:36:31,044 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 23:36:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 964 transitions. [2022-03-20 23:36:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 23:36:31,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:31,045 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:36:31,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 23:36:31,045 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 1 times [2022-03-20 23:36:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:31,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23336961] [2022-03-20 23:36:31,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2015725837, now seen corresponding path program 2 times [2022-03-20 23:36:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:31,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333437037] [2022-03-20 23:36:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:31,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:31,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:31,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:31,166 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 23:36:31,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333437037] [2022-03-20 23:36:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333437037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:31,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23336961] [2022-03-20 23:36:31,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23336961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:31,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201313625] [2022-03-20 23:36:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:31,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:36:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:36:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:36:31,168 INFO L87 Difference]: Start difference. First operand 664 states and 964 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:32,166 INFO L93 Difference]: Finished difference Result 1148 states and 1650 transitions. [2022-03-20 23:36:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:36:32,167 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 23:36:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:32,171 INFO L225 Difference]: With dead ends: 1148 [2022-03-20 23:36:32,171 INFO L226 Difference]: Without dead ends: 970 [2022-03-20 23:36:32,172 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 23:36:32,173 INFO L913 BasicCegarLoop]: 725 mSDtfsCounter, 1529 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:32,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 867 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:36:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-20 23:36:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 789. [2022-03-20 23:36:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 611 states have (on average 1.4042553191489362) internal successors, (858), 615 states have internal predecessors, (858), 114 states have call successors, (114), 46 states have call predecessors, (114), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-03-20 23:36:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1135 transitions. [2022-03-20 23:36:32,264 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1135 transitions. Word has length 30 [2022-03-20 23:36:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:32,264 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 1135 transitions. [2022-03-20 23:36:32,264 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 23:36:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1135 transitions. [2022-03-20 23:36:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 23:36:32,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:32,271 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:32,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 23:36:32,273 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 1 times [2022-03-20 23:36:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:32,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060057573] [2022-03-20 23:36:32,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -994008456, now seen corresponding path program 2 times [2022-03-20 23:36:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531684365] [2022-03-20 23:36:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:32,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:32,401 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 23:36:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:32,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531684365] [2022-03-20 23:36:32,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531684365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:32,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:32,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:32,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060057573] [2022-03-20 23:36:32,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060057573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:32,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:32,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653510332] [2022-03-20 23:36:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:32,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:36:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:32,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:36:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:36:32,404 INFO L87 Difference]: Start difference. First operand 789 states and 1135 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:34,147 INFO L93 Difference]: Finished difference Result 1630 states and 2449 transitions. [2022-03-20 23:36:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:36:34,147 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 23:36:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:34,153 INFO L225 Difference]: With dead ends: 1630 [2022-03-20 23:36:34,153 INFO L226 Difference]: Without dead ends: 1344 [2022-03-20 23:36:34,154 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 23:36:34,155 INFO L913 BasicCegarLoop]: 1009 mSDtfsCounter, 1111 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:34,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1265 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:36:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-03-20 23:36:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 907. [2022-03-20 23:36:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 708 states have (on average 1.4138418079096045) internal successors, (1001), 711 states have internal predecessors, (1001), 127 states have call successors, (127), 54 states have call predecessors, (127), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-03-20 23:36:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1348 transitions. [2022-03-20 23:36:34,233 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1348 transitions. Word has length 31 [2022-03-20 23:36:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:34,233 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1348 transitions. [2022-03-20 23:36:34,234 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 23:36:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1348 transitions. [2022-03-20 23:36:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 23:36:34,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:34,235 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:36:34,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 23:36:34,235 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 1 times [2022-03-20 23:36:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969793015] [2022-03-20 23:36:34,235 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash -987884657, now seen corresponding path program 2 times [2022-03-20 23:36:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:34,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028931556] [2022-03-20 23:36:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:34,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:34,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:34,395 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 23:36:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028931556] [2022-03-20 23:36:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028931556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:34,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:34,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:36:34,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969793015] [2022-03-20 23:36:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969793015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:34,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:34,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:36:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214631176] [2022-03-20 23:36:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:34,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:36:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:36:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:36:34,397 INFO L87 Difference]: Start difference. First operand 907 states and 1348 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 23:36:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:36,110 INFO L93 Difference]: Finished difference Result 1632 states and 2483 transitions. [2022-03-20 23:36:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:36:36,111 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 23:36:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:36,115 INFO L225 Difference]: With dead ends: 1632 [2022-03-20 23:36:36,115 INFO L226 Difference]: Without dead ends: 1046 [2022-03-20 23:36:36,117 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 23:36:36,117 INFO L913 BasicCegarLoop]: 738 mSDtfsCounter, 3363 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:36,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3369 Valid, 885 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 23:36:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-20 23:36:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 835. [2022-03-20 23:36:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 649 states have (on average 1.399075500770416) internal successors, (908), 653 states have internal predecessors, (908), 118 states have call successors, (118), 50 states have call predecessors, (118), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-03-20 23:36:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1203 transitions. [2022-03-20 23:36:36,201 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1203 transitions. Word has length 32 [2022-03-20 23:36:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:36,201 INFO L478 AbstractCegarLoop]: Abstraction has 835 states and 1203 transitions. [2022-03-20 23:36:36,201 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 23:36:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1203 transitions. [2022-03-20 23:36:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 23:36:36,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:36,205 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:36,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 23:36:36,205 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 1 times [2022-03-20 23:36:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200508575] [2022-03-20 23:36:36,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash 450252455, now seen corresponding path program 2 times [2022-03-20 23:36:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7517322] [2022-03-20 23:36:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:36,321 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 23:36:36,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:36,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7517322] [2022-03-20 23:36:36,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7517322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:36,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:36,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:36,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:36,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200508575] [2022-03-20 23:36:36,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200508575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:36,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:36,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589249391] [2022-03-20 23:36:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:36,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:36:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:36:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:36:36,322 INFO L87 Difference]: Start difference. First operand 835 states and 1203 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:37,878 INFO L93 Difference]: Finished difference Result 965 states and 1425 transitions. [2022-03-20 23:36:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:36:37,879 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 23:36:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:37,882 INFO L225 Difference]: With dead ends: 965 [2022-03-20 23:36:37,883 INFO L226 Difference]: Without dead ends: 961 [2022-03-20 23:36:37,883 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 23:36:37,883 INFO L913 BasicCegarLoop]: 713 mSDtfsCounter, 771 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:37,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 982 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 23:36:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-03-20 23:36:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 834. [2022-03-20 23:36:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 649 states have (on average 1.3959938366718028) internal successors, (906), 652 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-03-20 23:36:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1200 transitions. [2022-03-20 23:36:37,967 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1200 transitions. Word has length 36 [2022-03-20 23:36:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:37,967 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1200 transitions. [2022-03-20 23:36:37,967 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 23:36:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1200 transitions. [2022-03-20 23:36:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 23:36:37,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:37,968 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:37,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 23:36:37,968 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 1 times [2022-03-20 23:36:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:37,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1380709506] [2022-03-20 23:36:37,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash -783054808, now seen corresponding path program 2 times [2022-03-20 23:36:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:37,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358274159] [2022-03-20 23:36:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:38,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:36:38,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:38,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358274159] [2022-03-20 23:36:38,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358274159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:38,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:38,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:38,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:38,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1380709506] [2022-03-20 23:36:38,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1380709506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:38,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:38,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344473788] [2022-03-20 23:36:38,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:38,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:36:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:36:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:36:38,090 INFO L87 Difference]: Start difference. First operand 834 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:39,857 INFO L93 Difference]: Finished difference Result 1417 states and 2024 transitions. [2022-03-20 23:36:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:36:39,857 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 23:36:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:39,861 INFO L225 Difference]: With dead ends: 1417 [2022-03-20 23:36:39,861 INFO L226 Difference]: Without dead ends: 999 [2022-03-20 23:36:39,862 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 23:36:39,863 INFO L913 BasicCegarLoop]: 821 mSDtfsCounter, 1494 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:39,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1252 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:36:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-03-20 23:36:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2022-03-20 23:36:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 571 states have (on average 1.3870402802101576) internal successors, (792), 575 states have internal predecessors, (792), 106 states have call successors, (106), 45 states have call predecessors, (106), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-03-20 23:36:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1029 transitions. [2022-03-20 23:36:39,978 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1029 transitions. Word has length 39 [2022-03-20 23:36:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:39,978 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1029 transitions. [2022-03-20 23:36:39,978 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 23:36:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1029 transitions. [2022-03-20 23:36:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 23:36:39,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:39,981 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:36:39,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 23:36:39,981 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 1 times [2022-03-20 23:36:39,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514986962] [2022-03-20 23:36:39,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1815790808, now seen corresponding path program 2 times [2022-03-20 23:36:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:39,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499840681] [2022-03-20 23:36:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:39,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:40,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:40,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:40,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:36:40,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499840681] [2022-03-20 23:36:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499840681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:40,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:40,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:40,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:40,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514986962] [2022-03-20 23:36:40,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514986962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:40,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:40,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:36:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272359944] [2022-03-20 23:36:40,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:40,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:36:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:36:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:36:40,111 INFO L87 Difference]: Start difference. First operand 736 states and 1029 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 23:36:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:41,640 INFO L93 Difference]: Finished difference Result 979 states and 1409 transitions. [2022-03-20 23:36:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:36:41,640 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 23:36:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:41,643 INFO L225 Difference]: With dead ends: 979 [2022-03-20 23:36:41,644 INFO L226 Difference]: Without dead ends: 959 [2022-03-20 23:36:41,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:36:41,644 INFO L913 BasicCegarLoop]: 672 mSDtfsCounter, 1124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:41,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 773 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:36:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-20 23:36:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 762. [2022-03-20 23:36:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3983193277310924) internal successors, (832), 608 states have internal predecessors, (832), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-03-20 23:36:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1064 transitions. [2022-03-20 23:36:41,736 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1064 transitions. Word has length 40 [2022-03-20 23:36:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:41,736 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1064 transitions. [2022-03-20 23:36:41,736 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 23:36:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1064 transitions. [2022-03-20 23:36:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 23:36:41,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:41,738 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:41,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 23:36:41,738 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 1 times [2022-03-20 23:36:41,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:41,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822916998] [2022-03-20 23:36:41,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 737122156, now seen corresponding path program 2 times [2022-03-20 23:36:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085367087] [2022-03-20 23:36:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:41,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 23:36:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:41,840 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 23:36:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085367087] [2022-03-20 23:36:41,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085367087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:41,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:41,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:41,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822916998] [2022-03-20 23:36:41,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822916998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:41,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:41,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975444817] [2022-03-20 23:36:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:41,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:36:41,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:36:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:36:41,843 INFO L87 Difference]: Start difference. First operand 762 states and 1064 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 23:36:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:43,056 INFO L93 Difference]: Finished difference Result 1167 states and 1671 transitions. [2022-03-20 23:36:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:36:43,056 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 23:36:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:43,060 INFO L225 Difference]: With dead ends: 1167 [2022-03-20 23:36:43,060 INFO L226 Difference]: Without dead ends: 942 [2022-03-20 23:36:43,061 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 23:36:43,061 INFO L913 BasicCegarLoop]: 791 mSDtfsCounter, 1663 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:43,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1318 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:36:43,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-20 23:36:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 762. [2022-03-20 23:36:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 595 states have (on average 1.3966386554621848) internal successors, (831), 608 states have internal predecessors, (831), 108 states have call successors, (108), 48 states have call predecessors, (108), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-03-20 23:36:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1063 transitions. [2022-03-20 23:36:43,182 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1063 transitions. Word has length 46 [2022-03-20 23:36:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:43,182 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1063 transitions. [2022-03-20 23:36:43,182 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 23:36:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1063 transitions. [2022-03-20 23:36:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 23:36:43,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:43,185 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:43,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 23:36:43,185 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 1 times [2022-03-20 23:36:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693270574] [2022-03-20 23:36:43,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 8107196, now seen corresponding path program 2 times [2022-03-20 23:36:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85702508] [2022-03-20 23:36:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:43,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:43,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 23:36:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:43,302 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 23:36:43,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85702508] [2022-03-20 23:36:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85702508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:43,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:43,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693270574] [2022-03-20 23:36:43,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693270574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:43,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:43,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:43,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388444669] [2022-03-20 23:36:43,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:43,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:36:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:36:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:36:43,303 INFO L87 Difference]: Start difference. First operand 762 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 23:36:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:44,617 INFO L93 Difference]: Finished difference Result 964 states and 1383 transitions. [2022-03-20 23:36:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:36:44,617 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 23:36:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:44,620 INFO L225 Difference]: With dead ends: 964 [2022-03-20 23:36:44,620 INFO L226 Difference]: Without dead ends: 897 [2022-03-20 23:36:44,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:36:44,621 INFO L913 BasicCegarLoop]: 667 mSDtfsCounter, 1507 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:44,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1140 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 23:36:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-20 23:36:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 751. [2022-03-20 23:36:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 588 states have (on average 1.3979591836734695) internal successors, (822), 601 states have internal predecessors, (822), 106 states have call successors, (106), 46 states have call predecessors, (106), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-03-20 23:36:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1050 transitions. [2022-03-20 23:36:44,734 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1050 transitions. Word has length 47 [2022-03-20 23:36:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:44,734 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1050 transitions. [2022-03-20 23:36:44,735 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 23:36:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1050 transitions. [2022-03-20 23:36:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 23:36:44,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:44,736 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:44,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 23:36:44,736 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 1 times [2022-03-20 23:36:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582999329] [2022-03-20 23:36:44,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -776493065, now seen corresponding path program 2 times [2022-03-20 23:36:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337862564] [2022-03-20 23:36:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:44,865 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 23:36:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337862564] [2022-03-20 23:36:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337862564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:36:44,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582999329] [2022-03-20 23:36:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582999329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:36:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114157860] [2022-03-20 23:36:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:44,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 23:36:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 23:36:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:36:44,866 INFO L87 Difference]: Start difference. First operand 751 states and 1050 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 23:36:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:47,168 INFO L93 Difference]: Finished difference Result 1067 states and 1515 transitions. [2022-03-20 23:36:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:36:47,169 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 23:36:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:47,172 INFO L225 Difference]: With dead ends: 1067 [2022-03-20 23:36:47,172 INFO L226 Difference]: Without dead ends: 1006 [2022-03-20 23:36:47,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-20 23:36:47,173 INFO L913 BasicCegarLoop]: 766 mSDtfsCounter, 1821 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:47,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 1768 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 23:36:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-03-20 23:36:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 794. [2022-03-20 23:36:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 623 states have (on average 1.3964686998394864) internal successors, (870), 635 states have internal predecessors, (870), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-20 23:36:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-03-20 23:36:47,282 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 48 [2022-03-20 23:36:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:47,282 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-03-20 23:36:47,282 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 23:36:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-03-20 23:36:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 23:36:47,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:47,284 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:47,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 23:36:47,284 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 1 times [2022-03-20 23:36:47,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:47,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357598694] [2022-03-20 23:36:47,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:47,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1944299410, now seen corresponding path program 2 times [2022-03-20 23:36:47,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:47,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388666184] [2022-03-20 23:36:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:47,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:36:47,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388666184] [2022-03-20 23:36:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388666184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:47,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:36:47,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:47,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [357598694] [2022-03-20 23:36:47,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [357598694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:47,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:47,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:36:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467692934] [2022-03-20 23:36:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:47,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:36:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:36:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:36:47,447 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 23:36:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:49,499 INFO L93 Difference]: Finished difference Result 952 states and 1368 transitions. [2022-03-20 23:36:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:36:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-03-20 23:36:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:49,502 INFO L225 Difference]: With dead ends: 952 [2022-03-20 23:36:49,502 INFO L226 Difference]: Without dead ends: 924 [2022-03-20 23:36:49,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-20 23:36:49,503 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1180 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:49,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1456 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 23:36:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-03-20 23:36:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 797. [2022-03-20 23:36:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 626 states have (on average 1.3961661341853036) internal successors, (874), 638 states have internal predecessors, (874), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-20 23:36:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1115 transitions. [2022-03-20 23:36:49,625 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1115 transitions. Word has length 50 [2022-03-20 23:36:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:49,626 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1115 transitions. [2022-03-20 23:36:49,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 23:36:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1115 transitions. [2022-03-20 23:36:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 23:36:49,627 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:49,627 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:36:49,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 23:36:49,627 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 1 times [2022-03-20 23:36:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891215997] [2022-03-20 23:36:49,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -49845296, now seen corresponding path program 2 times [2022-03-20 23:36:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167816426] [2022-03-20 23:36:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:49,791 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 23:36:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167816426] [2022-03-20 23:36:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167816426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:49,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:49,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:49,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:49,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891215997] [2022-03-20 23:36:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891215997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:49,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781691461] [2022-03-20 23:36:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:49,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:36:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:36:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:36:49,792 INFO L87 Difference]: Start difference. First operand 797 states and 1115 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 23:36:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:52,224 INFO L93 Difference]: Finished difference Result 978 states and 1402 transitions. [2022-03-20 23:36:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:36:52,224 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 23:36:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:52,228 INFO L225 Difference]: With dead ends: 978 [2022-03-20 23:36:52,228 INFO L226 Difference]: Without dead ends: 914 [2022-03-20 23:36:52,228 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 23:36:52,228 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 1576 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:52,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1818 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 23:36:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-03-20 23:36:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 792. [2022-03-20 23:36:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 621 states have (on average 1.391304347826087) internal successors, (864), 633 states have internal predecessors, (864), 110 states have call successors, (110), 49 states have call predecessors, (110), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-03-20 23:36:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1105 transitions. [2022-03-20 23:36:52,381 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1105 transitions. Word has length 50 [2022-03-20 23:36:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:52,382 INFO L478 AbstractCegarLoop]: Abstraction has 792 states and 1105 transitions. [2022-03-20 23:36:52,382 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 23:36:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1105 transitions. [2022-03-20 23:36:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 23:36:52,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:52,385 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:52,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 23:36:52,385 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:52,385 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 1 times [2022-03-20 23:36:52,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:52,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871048155] [2022-03-20 23:36:52,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 96847506, now seen corresponding path program 2 times [2022-03-20 23:36:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:52,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310838428] [2022-03-20 23:36:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:52,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:36:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310838428] [2022-03-20 23:36:52,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310838428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:52,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:52,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:52,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871048155] [2022-03-20 23:36:52,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871048155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:52,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:52,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:36:52,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171431103] [2022-03-20 23:36:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:52,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:36:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:52,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:36:52,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:36:52,513 INFO L87 Difference]: Start difference. First operand 792 states and 1105 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 23:36:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:53,803 INFO L93 Difference]: Finished difference Result 1090 states and 1555 transitions. [2022-03-20 23:36:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:36:53,803 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 23:36:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:53,806 INFO L225 Difference]: With dead ends: 1090 [2022-03-20 23:36:53,806 INFO L226 Difference]: Without dead ends: 1074 [2022-03-20 23:36:53,807 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 23:36:53,807 INFO L913 BasicCegarLoop]: 799 mSDtfsCounter, 890 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:53,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1338 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:36:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-03-20 23:36:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 848. [2022-03-20 23:36:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 663 states have (on average 1.3725490196078431) internal successors, (910), 677 states have internal predecessors, (910), 112 states have call successors, (112), 51 states have call predecessors, (112), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-03-20 23:36:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1165 transitions. [2022-03-20 23:36:53,947 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1165 transitions. Word has length 50 [2022-03-20 23:36:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:53,947 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 1165 transitions. [2022-03-20 23:36:53,947 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 23:36:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1165 transitions. [2022-03-20 23:36:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 23:36:53,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:53,949 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:36:53,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 23:36:53,949 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 1 times [2022-03-20 23:36:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976696169] [2022-03-20 23:36:53,950 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:53,950 INFO L85 PathProgramCache]: Analyzing trace with hash 637282241, now seen corresponding path program 2 times [2022-03-20 23:36:53,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302752188] [2022-03-20 23:36:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:36:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:54,097 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 23:36:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302752188] [2022-03-20 23:36:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302752188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:54,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:54,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:36:54,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976696169] [2022-03-20 23:36:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976696169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:54,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:54,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:36:54,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808058476] [2022-03-20 23:36:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:54,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:36:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:36:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:36:54,099 INFO L87 Difference]: Start difference. First operand 848 states and 1165 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 23:36:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:55,359 INFO L93 Difference]: Finished difference Result 996 states and 1410 transitions. [2022-03-20 23:36:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:36:55,375 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 23:36:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:55,378 INFO L225 Difference]: With dead ends: 996 [2022-03-20 23:36:55,378 INFO L226 Difference]: Without dead ends: 991 [2022-03-20 23:36:55,379 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 23:36:55,379 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1190 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:55,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1168 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:36:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-20 23:36:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 867. [2022-03-20 23:36:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 679 states have (on average 1.369661266568483) internal successors, (930), 694 states have internal predecessors, (930), 113 states have call successors, (113), 52 states have call predecessors, (113), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-03-20 23:36:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1188 transitions. [2022-03-20 23:36:55,537 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1188 transitions. Word has length 52 [2022-03-20 23:36:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:55,538 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1188 transitions. [2022-03-20 23:36:55,538 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 23:36:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1188 transitions. [2022-03-20 23:36:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:36:55,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:55,539 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:55,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 23:36:55,540 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 1 times [2022-03-20 23:36:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [936003893] [2022-03-20 23:36:55,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 708397377, now seen corresponding path program 2 times [2022-03-20 23:36:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515118883] [2022-03-20 23:36:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:36:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 23:36:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:55,657 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 23:36:55,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515118883] [2022-03-20 23:36:55,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515118883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:55,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:55,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:36:55,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:55,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [936003893] [2022-03-20 23:36:55,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [936003893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:55,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:55,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:36:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282522735] [2022-03-20 23:36:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:55,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:36:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:36:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:36:55,659 INFO L87 Difference]: Start difference. First operand 867 states and 1188 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 23:36:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:57,442 INFO L93 Difference]: Finished difference Result 1203 states and 1692 transitions. [2022-03-20 23:36:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:36:57,442 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 23:36:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:57,445 INFO L225 Difference]: With dead ends: 1203 [2022-03-20 23:36:57,446 INFO L226 Difference]: Without dead ends: 956 [2022-03-20 23:36:57,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:36:57,447 INFO L913 BasicCegarLoop]: 641 mSDtfsCounter, 700 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:57,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1175 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:36:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-20 23:36:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 836. [2022-03-20 23:36:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 655 states have (on average 1.369465648854962) internal successors, (897), 668 states have internal predecessors, (897), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-03-20 23:36:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1148 transitions. [2022-03-20 23:36:57,613 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1148 transitions. Word has length 54 [2022-03-20 23:36:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:57,613 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1148 transitions. [2022-03-20 23:36:57,613 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 23:36:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1148 transitions. [2022-03-20 23:36:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 23:36:57,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:57,615 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:57,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 23:36:57,615 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 1 times [2022-03-20 23:36:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:57,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [576125869] [2022-03-20 23:36:57,615 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -848829632, now seen corresponding path program 2 times [2022-03-20 23:36:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847862409] [2022-03-20 23:36:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:57,739 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 23:36:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:57,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847862409] [2022-03-20 23:36:57,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847862409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:57,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:57,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:57,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:57,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [576125869] [2022-03-20 23:36:57,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [576125869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:57,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:57,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482540268] [2022-03-20 23:36:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:57,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:36:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:36:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:36:57,740 INFO L87 Difference]: Start difference. First operand 836 states and 1148 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 23:36:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:36:59,394 INFO L93 Difference]: Finished difference Result 971 states and 1378 transitions. [2022-03-20 23:36:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:36:59,404 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 23:36:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:36:59,407 INFO L225 Difference]: With dead ends: 971 [2022-03-20 23:36:59,407 INFO L226 Difference]: Without dead ends: 967 [2022-03-20 23:36:59,408 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 23:36:59,408 INFO L913 BasicCegarLoop]: 706 mSDtfsCounter, 735 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:36:59,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 2358 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3512 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 23:36:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-03-20 23:36:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 843. [2022-03-20 23:36:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 661 states have (on average 1.367624810892587) internal successors, (904), 675 states have internal predecessors, (904), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-20 23:36:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1157 transitions. [2022-03-20 23:36:59,610 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1157 transitions. Word has length 51 [2022-03-20 23:36:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:36:59,610 INFO L478 AbstractCegarLoop]: Abstraction has 843 states and 1157 transitions. [2022-03-20 23:36:59,610 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 23:36:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1157 transitions. [2022-03-20 23:36:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 23:36:59,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:36:59,612 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:59,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 23:36:59,612 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:36:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:36:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 1 times [2022-03-20 23:36:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163149300] [2022-03-20 23:36:59,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:36:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -849106462, now seen corresponding path program 2 times [2022-03-20 23:36:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:36:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849452336] [2022-03-20 23:36:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:36:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:36:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:36:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:36:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:36:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:36:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:36:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:36:59,802 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 23:36:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:36:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849452336] [2022-03-20 23:36:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849452336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:59,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:59,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:36:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163149300] [2022-03-20 23:36:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163149300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:36:59,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:36:59,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:36:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459666225] [2022-03-20 23:36:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:36:59,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:36:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:36:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:36:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:36:59,804 INFO L87 Difference]: Start difference. First operand 843 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 23:37:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:02,134 INFO L93 Difference]: Finished difference Result 986 states and 1394 transitions. [2022-03-20 23:37:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:02,135 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 23:37:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:02,139 INFO L225 Difference]: With dead ends: 986 [2022-03-20 23:37:02,139 INFO L226 Difference]: Without dead ends: 962 [2022-03-20 23:37:02,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:02,140 INFO L913 BasicCegarLoop]: 708 mSDtfsCounter, 737 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:02,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2458 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 23:37:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-03-20 23:37:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 842. [2022-03-20 23:37:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3666666666666667) internal successors, (902), 674 states have internal predecessors, (902), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-20 23:37:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1155 transitions. [2022-03-20 23:37:02,329 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1155 transitions. Word has length 51 [2022-03-20 23:37:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:02,329 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1155 transitions. [2022-03-20 23:37:02,330 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 23:37:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1155 transitions. [2022-03-20 23:37:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 23:37:02,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:02,331 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:02,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 23:37:02,331 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 1 times [2022-03-20 23:37:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520488662] [2022-03-20 23:37:02,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1275498861, now seen corresponding path program 2 times [2022-03-20 23:37:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410845501] [2022-03-20 23:37:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:02,557 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 23:37:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410845501] [2022-03-20 23:37:02,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410845501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:02,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:02,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:02,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520488662] [2022-03-20 23:37:02,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520488662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:02,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:02,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:02,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54589823] [2022-03-20 23:37:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:02,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:37:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:37:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:02,560 INFO L87 Difference]: Start difference. First operand 842 states and 1155 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:04,635 INFO L93 Difference]: Finished difference Result 974 states and 1378 transitions. [2022-03-20 23:37:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:04,635 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 23:37:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:04,638 INFO L225 Difference]: With dead ends: 974 [2022-03-20 23:37:04,638 INFO L226 Difference]: Without dead ends: 968 [2022-03-20 23:37:04,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:37:04,639 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 2613 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:04,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 1383 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:37:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-20 23:37:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 842. [2022-03-20 23:37:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 660 states have (on average 1.3651515151515152) internal successors, (901), 674 states have internal predecessors, (901), 112 states have call successors, (112), 51 states have call predecessors, (112), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-03-20 23:37:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1154 transitions. [2022-03-20 23:37:04,809 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1154 transitions. Word has length 53 [2022-03-20 23:37:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:04,809 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1154 transitions. [2022-03-20 23:37:04,809 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 23:37:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1154 transitions. [2022-03-20 23:37:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 23:37:04,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:04,811 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:04,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 23:37:04,811 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 1 times [2022-03-20 23:37:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:04,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327933853] [2022-03-20 23:37:04,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -204304198, now seen corresponding path program 2 times [2022-03-20 23:37:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:04,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314181420] [2022-03-20 23:37:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:37:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:04,954 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 23:37:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314181420] [2022-03-20 23:37:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314181420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:04,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:04,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327933853] [2022-03-20 23:37:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327933853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:04,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586195465] [2022-03-20 23:37:04,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:04,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:37:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:04,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:37:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:04,956 INFO L87 Difference]: Start difference. First operand 842 states and 1154 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 23:37:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:07,015 INFO L93 Difference]: Finished difference Result 979 states and 1383 transitions. [2022-03-20 23:37:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:37:07,015 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 23:37:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:07,018 INFO L225 Difference]: With dead ends: 979 [2022-03-20 23:37:07,018 INFO L226 Difference]: Without dead ends: 943 [2022-03-20 23:37:07,019 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 23:37:07,019 INFO L913 BasicCegarLoop]: 659 mSDtfsCounter, 1565 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:07,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 1284 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:37:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-20 23:37:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 815. [2022-03-20 23:37:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3746081504702194) internal successors, (877), 651 states have internal predecessors, (877), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-03-20 23:37:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1124 transitions. [2022-03-20 23:37:07,200 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1124 transitions. Word has length 52 [2022-03-20 23:37:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:07,200 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1124 transitions. [2022-03-20 23:37:07,200 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 23:37:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1124 transitions. [2022-03-20 23:37:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:37:07,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:07,202 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:07,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 23:37:07,202 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 1 times [2022-03-20 23:37:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:07,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40617419] [2022-03-20 23:37:07,203 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1517780378, now seen corresponding path program 2 times [2022-03-20 23:37:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:07,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871928911] [2022-03-20 23:37:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:07,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871928911] [2022-03-20 23:37:07,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871928911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:07,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:07,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:07,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40617419] [2022-03-20 23:37:07,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40617419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:07,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:07,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:07,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978273587] [2022-03-20 23:37:07,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:07,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:37:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:37:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:07,452 INFO L87 Difference]: Start difference. First operand 815 states and 1124 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:09,391 INFO L93 Difference]: Finished difference Result 945 states and 1345 transitions. [2022-03-20 23:37:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:09,392 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 23:37:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:09,394 INFO L225 Difference]: With dead ends: 945 [2022-03-20 23:37:09,394 INFO L226 Difference]: Without dead ends: 939 [2022-03-20 23:37:09,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:37:09,395 INFO L913 BasicCegarLoop]: 630 mSDtfsCounter, 2544 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:09,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 1558 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:37:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-20 23:37:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 815. [2022-03-20 23:37:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 638 states have (on average 1.3730407523510972) internal successors, (876), 651 states have internal predecessors, (876), 109 states have call successors, (109), 49 states have call predecessors, (109), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-03-20 23:37:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1123 transitions. [2022-03-20 23:37:09,564 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1123 transitions. Word has length 54 [2022-03-20 23:37:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:09,565 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 1123 transitions. [2022-03-20 23:37:09,565 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 23:37:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1123 transitions. [2022-03-20 23:37:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 23:37:09,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:09,566 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:09,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 23:37:09,566 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 1 times [2022-03-20 23:37:09,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700659643] [2022-03-20 23:37:09,567 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash 505594524, now seen corresponding path program 2 times [2022-03-20 23:37:09,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045413056] [2022-03-20 23:37:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:09,755 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 23:37:09,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045413056] [2022-03-20 23:37:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045413056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:09,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:09,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700659643] [2022-03-20 23:37:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700659643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:09,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817940959] [2022-03-20 23:37:09,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:09,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:37:09,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:37:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:37:09,757 INFO L87 Difference]: Start difference. First operand 815 states and 1123 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:11,839 INFO L93 Difference]: Finished difference Result 966 states and 1372 transitions. [2022-03-20 23:37:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:37:11,842 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 23:37:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:11,868 INFO L225 Difference]: With dead ends: 966 [2022-03-20 23:37:11,868 INFO L226 Difference]: Without dead ends: 926 [2022-03-20 23:37:11,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:37:11,870 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1069 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 4889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:11,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2476 Invalid, 4889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 4451 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 23:37:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-20 23:37:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 806. [2022-03-20 23:37:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 631 states have (on average 1.3565768621236134) internal successors, (856), 644 states have internal predecessors, (856), 107 states have call successors, (107), 49 states have call predecessors, (107), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-03-20 23:37:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1099 transitions. [2022-03-20 23:37:12,042 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1099 transitions. Word has length 55 [2022-03-20 23:37:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:12,043 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1099 transitions. [2022-03-20 23:37:12,043 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 23:37:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1099 transitions. [2022-03-20 23:37:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 23:37:12,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:12,044 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:12,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 23:37:12,044 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 1 times [2022-03-20 23:37:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27112643] [2022-03-20 23:37:12,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1791275328, now seen corresponding path program 2 times [2022-03-20 23:37:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896163859] [2022-03-20 23:37:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 23:37:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:12,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896163859] [2022-03-20 23:37:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896163859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:12,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:12,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:12,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27112643] [2022-03-20 23:37:12,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27112643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:12,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:12,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540029554] [2022-03-20 23:37:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:12,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:37:12,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:37:12,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:37:12,309 INFO L87 Difference]: Start difference. First operand 806 states and 1099 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 23:37:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:14,460 INFO L93 Difference]: Finished difference Result 942 states and 1326 transitions. [2022-03-20 23:37:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:37:14,461 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 23:37:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:14,464 INFO L225 Difference]: With dead ends: 942 [2022-03-20 23:37:14,464 INFO L226 Difference]: Without dead ends: 924 [2022-03-20 23:37:14,464 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 23:37:14,464 INFO L913 BasicCegarLoop]: 660 mSDtfsCounter, 978 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 5067 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:14,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2682 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5067 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 23:37:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-03-20 23:37:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 804. [2022-03-20 23:37:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 630 states have (on average 1.3555555555555556) internal successors, (854), 643 states have internal predecessors, (854), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-03-20 23:37:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1095 transitions. [2022-03-20 23:37:14,640 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1095 transitions. Word has length 56 [2022-03-20 23:37:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:14,641 INFO L478 AbstractCegarLoop]: Abstraction has 804 states and 1095 transitions. [2022-03-20 23:37:14,641 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 23:37:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1095 transitions. [2022-03-20 23:37:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 23:37:14,642 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:14,642 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:14,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 23:37:14,642 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 1 times [2022-03-20 23:37:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:14,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756551393] [2022-03-20 23:37:14,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 388427064, now seen corresponding path program 2 times [2022-03-20 23:37:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982777415] [2022-03-20 23:37:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:14,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 23:37:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:14,837 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 23:37:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982777415] [2022-03-20 23:37:14,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982777415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:14,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:14,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:14,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:14,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756551393] [2022-03-20 23:37:14,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756551393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:14,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:14,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:37:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459265546] [2022-03-20 23:37:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:14,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:37:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:37:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:37:14,839 INFO L87 Difference]: Start difference. First operand 804 states and 1095 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 23:37:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:16,736 INFO L93 Difference]: Finished difference Result 937 states and 1319 transitions. [2022-03-20 23:37:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:37:16,737 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 23:37:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:16,740 INFO L225 Difference]: With dead ends: 937 [2022-03-20 23:37:16,740 INFO L226 Difference]: Without dead ends: 919 [2022-03-20 23:37:16,740 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 23:37:16,741 INFO L913 BasicCegarLoop]: 657 mSDtfsCounter, 682 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:16,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2653 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 23:37:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-20 23:37:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 799. [2022-03-20 23:37:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.3556618819776713) internal successors, (850), 640 states have internal predecessors, (850), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-03-20 23:37:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1088 transitions. [2022-03-20 23:37:16,919 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1088 transitions. Word has length 55 [2022-03-20 23:37:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:16,919 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1088 transitions. [2022-03-20 23:37:16,919 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 23:37:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1088 transitions. [2022-03-20 23:37:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 23:37:16,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:16,921 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:16,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 23:37:16,921 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 1 times [2022-03-20 23:37:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674407444] [2022-03-20 23:37:16,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash 562366210, now seen corresponding path program 2 times [2022-03-20 23:37:16,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082361041] [2022-03-20 23:37:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:16,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:16,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:37:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:17,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:37:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:17,059 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 23:37:17,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082361041] [2022-03-20 23:37:17,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082361041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:17,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:17,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:17,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674407444] [2022-03-20 23:37:17,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674407444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:17,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:17,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033072214] [2022-03-20 23:37:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:17,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:17,060 INFO L87 Difference]: Start difference. First operand 799 states and 1088 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:18,704 INFO L93 Difference]: Finished difference Result 984 states and 1370 transitions. [2022-03-20 23:37:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:18,719 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 23:37:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:18,723 INFO L225 Difference]: With dead ends: 984 [2022-03-20 23:37:18,723 INFO L226 Difference]: Without dead ends: 941 [2022-03-20 23:37:18,723 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 23:37:18,724 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 1525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:18,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1190 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:37:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-20 23:37:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 799. [2022-03-20 23:37:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 627 states have (on average 1.354066985645933) internal successors, (849), 640 states have internal predecessors, (849), 105 states have call successors, (105), 49 states have call predecessors, (105), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-03-20 23:37:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1087 transitions. [2022-03-20 23:37:19,014 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1087 transitions. Word has length 56 [2022-03-20 23:37:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:19,014 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1087 transitions. [2022-03-20 23:37:19,014 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 23:37:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1087 transitions. [2022-03-20 23:37:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 23:37:19,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:19,031 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:19,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 23:37:19,032 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 1 times [2022-03-20 23:37:19,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [18178019] [2022-03-20 23:37:19,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -514626408, now seen corresponding path program 2 times [2022-03-20 23:37:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:19,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330020828] [2022-03-20 23:37:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:19,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 23:37:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 23:37:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:19,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:19,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330020828] [2022-03-20 23:37:19,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330020828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 23:37:19,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997164128] [2022-03-20 23:37:19,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 23:37:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 23:37:19,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:37:19,180 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 23:37:19,202 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 23:37:19,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 23:37:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 23:37:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 23:37:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 23:37:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 23:37:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:19,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997164128] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 23:37:19,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 23:37:19,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 15 [2022-03-20 23:37:19,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:19,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [18178019] [2022-03-20 23:37:19,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [18178019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:19,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:19,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:37:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348543793] [2022-03-20 23:37:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:19,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 23:37:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 23:37:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:37:19,842 INFO L87 Difference]: Start difference. First operand 799 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:20,414 INFO L93 Difference]: Finished difference Result 1117 states and 1518 transitions. [2022-03-20 23:37:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 23:37:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-03-20 23:37:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:20,425 INFO L225 Difference]: With dead ends: 1117 [2022-03-20 23:37:20,425 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 23:37:20,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:20,427 INFO L913 BasicCegarLoop]: 678 mSDtfsCounter, 882 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:20,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1125 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 23:37:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 23:37:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 837. [2022-03-20 23:37:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 658 states have (on average 1.3541033434650456) internal successors, (891), 671 states have internal predecessors, (891), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-03-20 23:37:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1142 transitions. [2022-03-20 23:37:20,632 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1142 transitions. Word has length 74 [2022-03-20 23:37:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:20,632 INFO L478 AbstractCegarLoop]: Abstraction has 837 states and 1142 transitions. [2022-03-20 23:37:20,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1142 transitions. [2022-03-20 23:37:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 23:37:20,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:20,633 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:20,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 23:37:20,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 23:37:20,850 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 1 times [2022-03-20 23:37:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35621349] [2022-03-20 23:37:20,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2049298278, now seen corresponding path program 2 times [2022-03-20 23:37:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313306681] [2022-03-20 23:37:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:21,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:21,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:21,157 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 23:37:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313306681] [2022-03-20 23:37:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313306681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:21,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:21,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:21,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35621349] [2022-03-20 23:37:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35621349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:21,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:21,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908553724] [2022-03-20 23:37:21,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:21,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 23:37:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 23:37:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:37:21,159 INFO L87 Difference]: Start difference. First operand 837 states and 1142 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 23:37:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:23,993 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2022-03-20 23:37:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:37:23,994 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 23:37:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:23,997 INFO L225 Difference]: With dead ends: 984 [2022-03-20 23:37:23,997 INFO L226 Difference]: Without dead ends: 958 [2022-03-20 23:37:23,997 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 23:37:23,997 INFO L913 BasicCegarLoop]: 636 mSDtfsCounter, 2002 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 5900 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 5900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:23,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 3175 Invalid, 6725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 5900 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 23:37:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-20 23:37:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 836. [2022-03-20 23:37:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 657 states have (on average 1.339421613394216) internal successors, (880), 670 states have internal predecessors, (880), 108 states have call successors, (108), 51 states have call predecessors, (108), 70 states have return successors, (143), 121 states have call predecessors, (143), 101 states have call successors, (143) [2022-03-20 23:37:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1131 transitions. [2022-03-20 23:37:24,221 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1131 transitions. Word has length 59 [2022-03-20 23:37:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:24,222 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 1131 transitions. [2022-03-20 23:37:24,222 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 23:37:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1131 transitions. [2022-03-20 23:37:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 23:37:24,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:24,223 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:24,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 23:37:24,223 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 1 times [2022-03-20 23:37:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845147341] [2022-03-20 23:37:24,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1081135518, now seen corresponding path program 2 times [2022-03-20 23:37:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138909792] [2022-03-20 23:37:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,444 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 23:37:24,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:24,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138909792] [2022-03-20 23:37:24,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138909792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:24,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:24,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:24,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:24,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845147341] [2022-03-20 23:37:24,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845147341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:24,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:24,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403644593] [2022-03-20 23:37:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:24,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:37:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:37:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:24,445 INFO L87 Difference]: Start difference. First operand 836 states and 1131 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 23:37:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:26,514 INFO L93 Difference]: Finished difference Result 973 states and 1356 transitions. [2022-03-20 23:37:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 23:37:26,515 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 23:37:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:26,517 INFO L225 Difference]: With dead ends: 973 [2022-03-20 23:37:26,517 INFO L226 Difference]: Without dead ends: 953 [2022-03-20 23:37:26,517 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 23:37:26,518 INFO L913 BasicCegarLoop]: 652 mSDtfsCounter, 941 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 5479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:26,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 2903 Invalid, 5479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5082 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 23:37:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-20 23:37:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-03-20 23:37:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 655 states have (on average 1.3389312977099237) internal successors, (877), 668 states have internal predecessors, (877), 107 states have call successors, (107), 51 states have call predecessors, (107), 70 states have return successors, (142), 120 states have call predecessors, (142), 100 states have call successors, (142) [2022-03-20 23:37:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1126 transitions. [2022-03-20 23:37:26,726 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1126 transitions. Word has length 58 [2022-03-20 23:37:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:26,727 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1126 transitions. [2022-03-20 23:37:26,727 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 23:37:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1126 transitions. [2022-03-20 23:37:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 23:37:26,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:26,728 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:26,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 23:37:26,728 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 1 times [2022-03-20 23:37:26,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1262502146] [2022-03-20 23:37:26,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1820752266, now seen corresponding path program 2 times [2022-03-20 23:37:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310806272] [2022-03-20 23:37:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:26,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,952 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 23:37:26,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310806272] [2022-03-20 23:37:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310806272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:26,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:26,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:26,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1262502146] [2022-03-20 23:37:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1262502146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:26,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:26,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:26,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074730523] [2022-03-20 23:37:26,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:26,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:37:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:37:26,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:26,954 INFO L87 Difference]: Start difference. First operand 833 states and 1126 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:29,424 INFO L93 Difference]: Finished difference Result 1006 states and 1388 transitions. [2022-03-20 23:37:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:37:29,425 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 23:37:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:29,427 INFO L225 Difference]: With dead ends: 1006 [2022-03-20 23:37:29,427 INFO L226 Difference]: Without dead ends: 938 [2022-03-20 23:37:29,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-20 23:37:29,428 INFO L913 BasicCegarLoop]: 628 mSDtfsCounter, 673 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 4401 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 4401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:29,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 2420 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 4401 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 23:37:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-20 23:37:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 821. [2022-03-20 23:37:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 646 states have (on average 1.3343653250773995) internal successors, (862), 659 states have internal predecessors, (862), 104 states have call successors, (104), 51 states have call predecessors, (104), 70 states have return successors, (139), 117 states have call predecessors, (139), 97 states have call successors, (139) [2022-03-20 23:37:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1105 transitions. [2022-03-20 23:37:29,625 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1105 transitions. Word has length 59 [2022-03-20 23:37:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:29,625 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1105 transitions. [2022-03-20 23:37:29,625 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 23:37:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1105 transitions. [2022-03-20 23:37:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 23:37:29,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:29,626 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:29,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 23:37:29,627 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 1 times [2022-03-20 23:37:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019758460] [2022-03-20 23:37:29,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash 600816654, now seen corresponding path program 2 times [2022-03-20 23:37:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484327120] [2022-03-20 23:37:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,771 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 23:37:29,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484327120] [2022-03-20 23:37:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484327120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:29,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:29,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019758460] [2022-03-20 23:37:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019758460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:29,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846052566] [2022-03-20 23:37:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:29,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 23:37:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 23:37:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:37:29,773 INFO L87 Difference]: Start difference. First operand 821 states and 1105 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:31,526 INFO L93 Difference]: Finished difference Result 1102 states and 1563 transitions. [2022-03-20 23:37:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:31,526 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 23:37:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:31,531 INFO L225 Difference]: With dead ends: 1102 [2022-03-20 23:37:31,531 INFO L226 Difference]: Without dead ends: 991 [2022-03-20 23:37:31,536 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 23:37:31,545 INFO L913 BasicCegarLoop]: 608 mSDtfsCounter, 400 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:31,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1570 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:37:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-20 23:37:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 828. [2022-03-20 23:37:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 651 states have (on average 1.3348694316436251) internal successors, (869), 665 states have internal predecessors, (869), 105 states have call successors, (105), 51 states have call predecessors, (105), 71 states have return successors, (147), 118 states have call predecessors, (147), 98 states have call successors, (147) [2022-03-20 23:37:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1121 transitions. [2022-03-20 23:37:31,779 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1121 transitions. Word has length 60 [2022-03-20 23:37:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:31,780 INFO L478 AbstractCegarLoop]: Abstraction has 828 states and 1121 transitions. [2022-03-20 23:37:31,780 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 23:37:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1121 transitions. [2022-03-20 23:37:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 23:37:31,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:31,781 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:31,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 23:37:31,781 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 1 times [2022-03-20 23:37:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:31,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779098169] [2022-03-20 23:37:31,782 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash 875576268, now seen corresponding path program 2 times [2022-03-20 23:37:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:31,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292861118] [2022-03-20 23:37:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:31,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:32,022 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 23:37:32,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292861118] [2022-03-20 23:37:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292861118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:32,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:32,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:32,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779098169] [2022-03-20 23:37:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779098169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:32,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:32,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151391426] [2022-03-20 23:37:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:32,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:37:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:37:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:32,024 INFO L87 Difference]: Start difference. First operand 828 states and 1121 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:34,149 INFO L93 Difference]: Finished difference Result 971 states and 1360 transitions. [2022-03-20 23:37:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:37:34,150 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 23:37:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:34,152 INFO L225 Difference]: With dead ends: 971 [2022-03-20 23:37:34,152 INFO L226 Difference]: Without dead ends: 946 [2022-03-20 23:37:34,153 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 23:37:34,153 INFO L913 BasicCegarLoop]: 633 mSDtfsCounter, 1274 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 3598 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 4112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 3598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:34,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 2478 Invalid, 4112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 3598 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 23:37:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-20 23:37:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 826. [2022-03-20 23:37:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.333846153846154) internal successors, (867), 664 states have internal predecessors, (867), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-03-20 23:37:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1117 transitions. [2022-03-20 23:37:34,365 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1117 transitions. Word has length 60 [2022-03-20 23:37:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:34,365 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1117 transitions. [2022-03-20 23:37:34,365 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 23:37:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1117 transitions. [2022-03-20 23:37:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 23:37:34,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:34,367 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:34,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 23:37:34,367 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 1 times [2022-03-20 23:37:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:34,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976811966] [2022-03-20 23:37:34,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1391350355, now seen corresponding path program 2 times [2022-03-20 23:37:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531181300] [2022-03-20 23:37:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:37:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,525 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 23:37:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:34,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531181300] [2022-03-20 23:37:34,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531181300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:34,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:34,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:34,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:34,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976811966] [2022-03-20 23:37:34,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976811966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:34,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:34,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:34,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841359768] [2022-03-20 23:37:34,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:34,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 23:37:34,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:34,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 23:37:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:37:34,527 INFO L87 Difference]: Start difference. First operand 826 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:35,822 INFO L93 Difference]: Finished difference Result 980 states and 1364 transitions. [2022-03-20 23:37:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-03-20 23:37:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:35,825 INFO L225 Difference]: With dead ends: 980 [2022-03-20 23:37:35,826 INFO L226 Difference]: Without dead ends: 948 [2022-03-20 23:37:35,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:35,827 INFO L913 BasicCegarLoop]: 612 mSDtfsCounter, 645 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:35,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1756 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:37:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-20 23:37:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 826. [2022-03-20 23:37:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 650 states have (on average 1.3323076923076924) internal successors, (866), 664 states have internal predecessors, (866), 104 states have call successors, (104), 51 states have call predecessors, (104), 71 states have return successors, (146), 117 states have call predecessors, (146), 97 states have call successors, (146) [2022-03-20 23:37:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1116 transitions. [2022-03-20 23:37:36,069 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1116 transitions. Word has length 60 [2022-03-20 23:37:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:36,069 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1116 transitions. [2022-03-20 23:37:36,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1116 transitions. [2022-03-20 23:37:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 23:37:36,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:36,071 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:36,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 23:37:36,071 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 1 times [2022-03-20 23:37:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:36,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1489615876] [2022-03-20 23:37:36,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1900823445, now seen corresponding path program 2 times [2022-03-20 23:37:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128555267] [2022-03-20 23:37:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:37:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:36,351 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 23:37:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128555267] [2022-03-20 23:37:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128555267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:36,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:36,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1489615876] [2022-03-20 23:37:36,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1489615876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:36,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:37:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768072775] [2022-03-20 23:37:36,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:36,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:37:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:37:36,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:36,353 INFO L87 Difference]: Start difference. First operand 826 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 23:37:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:38,702 INFO L93 Difference]: Finished difference Result 987 states and 1381 transitions. [2022-03-20 23:37:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:37:38,702 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 23:37:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:38,705 INFO L225 Difference]: With dead ends: 987 [2022-03-20 23:37:38,705 INFO L226 Difference]: Without dead ends: 935 [2022-03-20 23:37:38,706 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 23:37:38,706 INFO L913 BasicCegarLoop]: 627 mSDtfsCounter, 971 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 4521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:38,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 2660 Invalid, 4521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 23:37:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-03-20 23:37:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 818. [2022-03-20 23:37:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 658 states have internal predecessors, (855), 102 states have call successors, (102), 51 states have call predecessors, (102), 71 states have return successors, (144), 115 states have call predecessors, (144), 95 states have call successors, (144) [2022-03-20 23:37:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1101 transitions. [2022-03-20 23:37:38,947 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1101 transitions. Word has length 60 [2022-03-20 23:37:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:38,947 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1101 transitions. [2022-03-20 23:37:38,947 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 23:37:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1101 transitions. [2022-03-20 23:37:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 23:37:38,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:38,948 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:38,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 23:37:38,949 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 1 times [2022-03-20 23:37:38,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [47138809] [2022-03-20 23:37:38,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash -384399656, now seen corresponding path program 2 times [2022-03-20 23:37:38,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68407340] [2022-03-20 23:37:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:38,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:37:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:39,120 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 23:37:39,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68407340] [2022-03-20 23:37:39,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68407340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:39,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:39,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:39,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:39,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [47138809] [2022-03-20 23:37:39,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [47138809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:39,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:39,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301615587] [2022-03-20 23:37:39,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:39,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:39,121 INFO L87 Difference]: Start difference. First operand 818 states and 1101 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:40,895 INFO L93 Difference]: Finished difference Result 983 states and 1382 transitions. [2022-03-20 23:37:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:37:40,895 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 23:37:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:40,898 INFO L225 Difference]: With dead ends: 983 [2022-03-20 23:37:40,898 INFO L226 Difference]: Without dead ends: 949 [2022-03-20 23:37:40,899 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 23:37:40,899 INFO L913 BasicCegarLoop]: 593 mSDtfsCounter, 654 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:40,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1481 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:37:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-03-20 23:37:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 822. [2022-03-20 23:37:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 646 states have (on average 1.326625386996904) internal successors, (857), 662 states have internal predecessors, (857), 102 states have call successors, (102), 51 states have call predecessors, (102), 73 states have return successors, (160), 115 states have call predecessors, (160), 95 states have call successors, (160) [2022-03-20 23:37:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1119 transitions. [2022-03-20 23:37:41,129 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1119 transitions. Word has length 61 [2022-03-20 23:37:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:41,129 INFO L478 AbstractCegarLoop]: Abstraction has 822 states and 1119 transitions. [2022-03-20 23:37:41,129 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 23:37:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1119 transitions. [2022-03-20 23:37:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 23:37:41,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:41,130 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:41,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 23:37:41,130 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 1 times [2022-03-20 23:37:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:41,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452258566] [2022-03-20 23:37:41,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 73194234, now seen corresponding path program 2 times [2022-03-20 23:37:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:41,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056575241] [2022-03-20 23:37:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:37:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,454 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 23:37:41,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056575241] [2022-03-20 23:37:41,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056575241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:41,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:41,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:41,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452258566] [2022-03-20 23:37:41,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452258566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:41,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:41,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299648416] [2022-03-20 23:37:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:41,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 23:37:41,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 23:37:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:37:41,457 INFO L87 Difference]: Start difference. First operand 822 states and 1119 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 23:37:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:44,417 INFO L93 Difference]: Finished difference Result 961 states and 1352 transitions. [2022-03-20 23:37:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 23:37:44,417 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 23:37:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:44,419 INFO L225 Difference]: With dead ends: 961 [2022-03-20 23:37:44,419 INFO L226 Difference]: Without dead ends: 937 [2022-03-20 23:37:44,420 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 23:37:44,420 INFO L913 BasicCegarLoop]: 592 mSDtfsCounter, 1489 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 5390 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 6006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:44,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 3156 Invalid, 6006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 5390 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 23:37:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-03-20 23:37:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2022-03-20 23:37:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 661 states have internal predecessors, (855), 101 states have call successors, (101), 51 states have call predecessors, (101), 73 states have return successors, (159), 114 states have call predecessors, (159), 94 states have call successors, (159) [2022-03-20 23:37:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1115 transitions. [2022-03-20 23:37:44,648 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1115 transitions. Word has length 63 [2022-03-20 23:37:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:44,648 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1115 transitions. [2022-03-20 23:37:44,648 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 23:37:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1115 transitions. [2022-03-20 23:37:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 23:37:44,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:44,649 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, 1, 1, 1, 1, 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 23:37:44,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 23:37:44,650 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 1 times [2022-03-20 23:37:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943186936] [2022-03-20 23:37:44,650 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -395524383, now seen corresponding path program 2 times [2022-03-20 23:37:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912406163] [2022-03-20 23:37:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:37:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,927 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 23:37:44,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912406163] [2022-03-20 23:37:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912406163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:44,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:44,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:37:44,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943186936] [2022-03-20 23:37:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943186936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:44,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:44,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:37:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789969704] [2022-03-20 23:37:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:44,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:37:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:37:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:37:44,928 INFO L87 Difference]: Start difference. First operand 820 states and 1115 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 23:37:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:47,754 INFO L93 Difference]: Finished difference Result 961 states and 1350 transitions. [2022-03-20 23:37:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 23:37:47,755 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 23:37:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:47,767 INFO L225 Difference]: With dead ends: 961 [2022-03-20 23:37:47,767 INFO L226 Difference]: Without dead ends: 936 [2022-03-20 23:37:47,768 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 23:37:47,779 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 1517 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 5493 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 5493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:47,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 3385 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 5493 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 23:37:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-20 23:37:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 818. [2022-03-20 23:37:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 644 states have (on average 1.3245341614906831) internal successors, (853), 660 states have internal predecessors, (853), 100 states have call successors, (100), 51 states have call predecessors, (100), 73 states have return successors, (158), 113 states have call predecessors, (158), 93 states have call successors, (158) [2022-03-20 23:37:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1111 transitions. [2022-03-20 23:37:48,048 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1111 transitions. Word has length 66 [2022-03-20 23:37:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:48,048 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1111 transitions. [2022-03-20 23:37:48,048 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 23:37:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1111 transitions. [2022-03-20 23:37:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 23:37:48,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:48,049 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:48,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 23:37:48,050 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 1 times [2022-03-20 23:37:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:48,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472878411] [2022-03-20 23:37:48,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 233977310, now seen corresponding path program 2 times [2022-03-20 23:37:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:48,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337613322] [2022-03-20 23:37:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 23:37:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,302 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 23:37:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337613322] [2022-03-20 23:37:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337613322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:48,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:48,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:48,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472878411] [2022-03-20 23:37:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472878411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:48,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:48,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:37:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151858244] [2022-03-20 23:37:48,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:48,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 23:37:48,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 23:37:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:37:48,304 INFO L87 Difference]: Start difference. First operand 818 states and 1111 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 23:37:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:51,104 INFO L93 Difference]: Finished difference Result 958 states and 1343 transitions. [2022-03-20 23:37:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:37:51,104 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 23:37:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:51,107 INFO L225 Difference]: With dead ends: 958 [2022-03-20 23:37:51,108 INFO L226 Difference]: Without dead ends: 934 [2022-03-20 23:37:51,108 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 23:37:51,109 INFO L913 BasicCegarLoop]: 567 mSDtfsCounter, 1189 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 5647 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 5647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:51,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 2938 Invalid, 6137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 5647 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 23:37:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-20 23:37:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 816. [2022-03-20 23:37:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 643 states have (on average 1.32348367029549) internal successors, (851), 659 states have internal predecessors, (851), 99 states have call successors, (99), 51 states have call predecessors, (99), 73 states have return successors, (157), 112 states have call predecessors, (157), 92 states have call successors, (157) [2022-03-20 23:37:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1107 transitions. [2022-03-20 23:37:51,360 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1107 transitions. Word has length 62 [2022-03-20 23:37:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:51,360 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1107 transitions. [2022-03-20 23:37:51,360 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 23:37:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1107 transitions. [2022-03-20 23:37:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 23:37:51,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:51,361 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:51,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 23:37:51,362 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 1 times [2022-03-20 23:37:51,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2121373705] [2022-03-20 23:37:51,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1213250190, now seen corresponding path program 2 times [2022-03-20 23:37:51,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369417700] [2022-03-20 23:37:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:51,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,581 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 23:37:51,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:51,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369417700] [2022-03-20 23:37:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369417700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:51,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:37:51,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2121373705] [2022-03-20 23:37:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2121373705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:51,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:51,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:37:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555790276] [2022-03-20 23:37:51,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:51,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:37:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:37:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:37:51,582 INFO L87 Difference]: Start difference. First operand 816 states and 1107 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:37:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:53,326 INFO L93 Difference]: Finished difference Result 949 states and 1332 transitions. [2022-03-20 23:37:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:37:53,327 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 23:37:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:53,329 INFO L225 Difference]: With dead ends: 949 [2022-03-20 23:37:53,329 INFO L226 Difference]: Without dead ends: 927 [2022-03-20 23:37:53,330 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 23:37:53,330 INFO L913 BasicCegarLoop]: 590 mSDtfsCounter, 600 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 5198 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 5198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:53,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 3046 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 5198 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:37:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-03-20 23:37:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 811. [2022-03-20 23:37:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 640 states have (on average 1.3234375) internal successors, (847), 656 states have internal predecessors, (847), 98 states have call successors, (98), 51 states have call predecessors, (98), 72 states have return successors, (155), 110 states have call predecessors, (155), 91 states have call successors, (155) [2022-03-20 23:37:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1100 transitions. [2022-03-20 23:37:53,586 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1100 transitions. Word has length 62 [2022-03-20 23:37:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:53,586 INFO L478 AbstractCegarLoop]: Abstraction has 811 states and 1100 transitions. [2022-03-20 23:37:53,586 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 23:37:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1100 transitions. [2022-03-20 23:37:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 23:37:53,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:53,587 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:53,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 23:37:53,587 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 1 times [2022-03-20 23:37:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296121476] [2022-03-20 23:37:53,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -20126443, now seen corresponding path program 2 times [2022-03-20 23:37:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:53,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858340497] [2022-03-20 23:37:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:53,725 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 23:37:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858340497] [2022-03-20 23:37:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858340497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:53,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:53,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:53,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296121476] [2022-03-20 23:37:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296121476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:53,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:53,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:53,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929259134] [2022-03-20 23:37:53,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:53,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:53,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:53,727 INFO L87 Difference]: Start difference. First operand 811 states and 1100 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:54,639 INFO L93 Difference]: Finished difference Result 1144 states and 1570 transitions. [2022-03-20 23:37:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:37:54,639 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 23:37:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:54,641 INFO L225 Difference]: With dead ends: 1144 [2022-03-20 23:37:54,641 INFO L226 Difference]: Without dead ends: 812 [2022-03-20 23:37:54,642 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 23:37:54,642 INFO L913 BasicCegarLoop]: 523 mSDtfsCounter, 909 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:54,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 884 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:37:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-20 23:37:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 703. [2022-03-20 23:37:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 555 states have (on average 1.3099099099099099) internal successors, (727), 571 states have internal predecessors, (727), 85 states have call successors, (85), 45 states have call predecessors, (85), 62 states have return successors, (109), 93 states have call predecessors, (109), 78 states have call successors, (109) [2022-03-20 23:37:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 921 transitions. [2022-03-20 23:37:54,858 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 921 transitions. Word has length 63 [2022-03-20 23:37:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:54,858 INFO L478 AbstractCegarLoop]: Abstraction has 703 states and 921 transitions. [2022-03-20 23:37:54,859 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 23:37:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 921 transitions. [2022-03-20 23:37:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 23:37:54,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:54,860 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:54,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 23:37:54,861 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 1 times [2022-03-20 23:37:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289369556] [2022-03-20 23:37:54,861 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1125022054, now seen corresponding path program 2 times [2022-03-20 23:37:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392394798] [2022-03-20 23:37:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:37:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:37:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,073 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 23:37:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392394798] [2022-03-20 23:37:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392394798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:55,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:55,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:37:55,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289369556] [2022-03-20 23:37:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289369556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:55,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:55,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:37:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161801092] [2022-03-20 23:37:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:55,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:37:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:37:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:37:55,075 INFO L87 Difference]: Start difference. First operand 703 states and 921 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:37:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:57,545 INFO L93 Difference]: Finished difference Result 780 states and 1034 transitions. [2022-03-20 23:37:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:37:57,546 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 23:37:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:57,548 INFO L225 Difference]: With dead ends: 780 [2022-03-20 23:37:57,548 INFO L226 Difference]: Without dead ends: 758 [2022-03-20 23:37:57,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-20 23:37:57,548 INFO L913 BasicCegarLoop]: 525 mSDtfsCounter, 841 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 5817 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 5817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:57,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2683 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 5817 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 23:37:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-20 23:37:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 698. [2022-03-20 23:37:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 552 states have (on average 1.309782608695652) internal successors, (723), 568 states have internal predecessors, (723), 84 states have call successors, (84), 45 states have call predecessors, (84), 61 states have return successors, (107), 91 states have call predecessors, (107), 77 states have call successors, (107) [2022-03-20 23:37:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 914 transitions. [2022-03-20 23:37:57,781 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 914 transitions. Word has length 63 [2022-03-20 23:37:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:57,781 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 914 transitions. [2022-03-20 23:37:57,781 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 23:37:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 914 transitions. [2022-03-20 23:37:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 23:37:57,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:57,782 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:57,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 23:37:57,782 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 1 times [2022-03-20 23:37:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:57,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [553477287] [2022-03-20 23:37:57,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash -871017626, now seen corresponding path program 2 times [2022-03-20 23:37:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028480445] [2022-03-20 23:37:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:57,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 23:37:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 23:37:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,961 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 23:37:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:57,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028480445] [2022-03-20 23:37:57,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028480445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:57,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:57,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:57,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:57,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [553477287] [2022-03-20 23:37:57,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [553477287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:57,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:57,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998504377] [2022-03-20 23:37:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:57,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:37:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:37:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:57,962 INFO L87 Difference]: Start difference. First operand 698 states and 914 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:59,406 INFO L93 Difference]: Finished difference Result 971 states and 1279 transitions. [2022-03-20 23:37:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 23:37:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:59,409 INFO L225 Difference]: With dead ends: 971 [2022-03-20 23:37:59,409 INFO L226 Difference]: Without dead ends: 834 [2022-03-20 23:37:59,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:59,409 INFO L913 BasicCegarLoop]: 536 mSDtfsCounter, 844 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:59,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1065 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:37:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-20 23:37:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 717. [2022-03-20 23:37:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.3015873015873016) internal successors, (738), 582 states have internal predecessors, (738), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-20 23:37:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 928 transitions. [2022-03-20 23:37:59,636 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 928 transitions. Word has length 67 [2022-03-20 23:37:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:59,637 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 928 transitions. [2022-03-20 23:37:59,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:37:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 928 transitions. [2022-03-20 23:37:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 23:37:59,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:59,638 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:37:59,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 23:37:59,638 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 1 times [2022-03-20 23:37:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:59,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567275844] [2022-03-20 23:37:59,639 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:59,639 INFO L85 PathProgramCache]: Analyzing trace with hash 505400329, now seen corresponding path program 2 times [2022-03-20 23:37:59,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:59,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610160594] [2022-03-20 23:37:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 23:37:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:59,773 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 23:37:59,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:59,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610160594] [2022-03-20 23:37:59,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610160594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:59,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:59,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:59,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:59,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567275844] [2022-03-20 23:37:59,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567275844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:59,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:59,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482990473] [2022-03-20 23:37:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:59,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:37:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:37:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:59,774 INFO L87 Difference]: Start difference. First operand 717 states and 928 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 23:38:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:01,273 INFO L93 Difference]: Finished difference Result 908 states and 1199 transitions. [2022-03-20 23:38:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:38:01,273 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 23:38:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:01,275 INFO L225 Difference]: With dead ends: 908 [2022-03-20 23:38:01,275 INFO L226 Difference]: Without dead ends: 788 [2022-03-20 23:38:01,276 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 23:38:01,276 INFO L913 BasicCegarLoop]: 481 mSDtfsCounter, 416 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:01,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 934 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 23:38:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-20 23:38:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 717. [2022-03-20 23:38:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 567 states have (on average 1.2962962962962963) internal successors, (735), 582 states have internal predecessors, (735), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-20 23:38:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 925 transitions. [2022-03-20 23:38:01,515 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 925 transitions. Word has length 66 [2022-03-20 23:38:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:01,515 INFO L478 AbstractCegarLoop]: Abstraction has 717 states and 925 transitions. [2022-03-20 23:38:01,515 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 23:38:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 925 transitions. [2022-03-20 23:38:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 23:38:01,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:01,517 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:01,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 23:38:01,517 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 1 times [2022-03-20 23:38:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:01,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034027968] [2022-03-20 23:38:01,518 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1348887076, now seen corresponding path program 2 times [2022-03-20 23:38:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:01,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681613222] [2022-03-20 23:38:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 23:38:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,710 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 23:38:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681613222] [2022-03-20 23:38:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681613222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:01,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:01,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034027968] [2022-03-20 23:38:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034027968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:01,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895335934] [2022-03-20 23:38:01,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:01,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:01,712 INFO L87 Difference]: Start difference. First operand 717 states and 925 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 23:38:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:03,381 INFO L93 Difference]: Finished difference Result 852 states and 1114 transitions. [2022-03-20 23:38:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 23:38:03,381 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 23:38:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:03,383 INFO L225 Difference]: With dead ends: 852 [2022-03-20 23:38:03,383 INFO L226 Difference]: Without dead ends: 819 [2022-03-20 23:38:03,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:03,384 INFO L913 BasicCegarLoop]: 502 mSDtfsCounter, 1601 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:03,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 1355 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:38:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-03-20 23:38:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 723. [2022-03-20 23:38:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2954545454545454) internal successors, (741), 587 states have internal predecessors, (741), 85 states have call successors, (85), 48 states have call predecessors, (85), 65 states have return successors, (107), 94 states have call predecessors, (107), 79 states have call successors, (107) [2022-03-20 23:38:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 933 transitions. [2022-03-20 23:38:03,620 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 933 transitions. Word has length 65 [2022-03-20 23:38:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:03,620 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 933 transitions. [2022-03-20 23:38:03,620 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 23:38:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 933 transitions. [2022-03-20 23:38:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 23:38:03,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:03,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:03,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 23:38:03,621 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 1 times [2022-03-20 23:38:03,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:03,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635695660] [2022-03-20 23:38:03,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1649412610, now seen corresponding path program 2 times [2022-03-20 23:38:03,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:03,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382682101] [2022-03-20 23:38:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:03,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:03,901 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 23:38:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382682101] [2022-03-20 23:38:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382682101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:03,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:03,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:03,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635695660] [2022-03-20 23:38:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635695660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:03,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:03,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:03,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826209482] [2022-03-20 23:38:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:03,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:38:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:38:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:03,903 INFO L87 Difference]: Start difference. First operand 723 states and 933 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 23:38:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:06,425 INFO L93 Difference]: Finished difference Result 816 states and 1069 transitions. [2022-03-20 23:38:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 23:38:06,425 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 23:38:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:06,428 INFO L225 Difference]: With dead ends: 816 [2022-03-20 23:38:06,428 INFO L226 Difference]: Without dead ends: 791 [2022-03-20 23:38:06,428 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 23:38:06,428 INFO L913 BasicCegarLoop]: 516 mSDtfsCounter, 1701 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:06,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 2872 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5322 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 23:38:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-20 23:38:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 721. [2022-03-20 23:38:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2942206654991244) internal successors, (739), 586 states have internal predecessors, (739), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-20 23:38:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 929 transitions. [2022-03-20 23:38:06,686 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 929 transitions. Word has length 67 [2022-03-20 23:38:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:06,686 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 929 transitions. [2022-03-20 23:38:06,686 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 23:38:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 929 transitions. [2022-03-20 23:38:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 23:38:06,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:06,688 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:06,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 23:38:06,688 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 1 times [2022-03-20 23:38:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347733780] [2022-03-20 23:38:06,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 257334910, now seen corresponding path program 2 times [2022-03-20 23:38:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:06,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365423862] [2022-03-20 23:38:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:06,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 23:38:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:06,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365423862] [2022-03-20 23:38:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365423862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:06,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:06,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347733780] [2022-03-20 23:38:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347733780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:06,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224126194] [2022-03-20 23:38:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:06,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:06,885 INFO L87 Difference]: Start difference. First operand 721 states and 929 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:08,616 INFO L93 Difference]: Finished difference Result 847 states and 1100 transitions. [2022-03-20 23:38:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:38:08,616 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 23:38:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:08,618 INFO L225 Difference]: With dead ends: 847 [2022-03-20 23:38:08,618 INFO L226 Difference]: Without dead ends: 793 [2022-03-20 23:38:08,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:38:08,620 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 591 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:08,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1527 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-20 23:38:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 721. [2022-03-20 23:38:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 571 states have (on average 1.2907180385288968) internal successors, (737), 586 states have internal predecessors, (737), 84 states have call successors, (84), 48 states have call predecessors, (84), 65 states have return successors, (106), 93 states have call predecessors, (106), 78 states have call successors, (106) [2022-03-20 23:38:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 927 transitions. [2022-03-20 23:38:08,887 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 927 transitions. Word has length 66 [2022-03-20 23:38:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:08,887 INFO L478 AbstractCegarLoop]: Abstraction has 721 states and 927 transitions. [2022-03-20 23:38:08,887 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 23:38:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 927 transitions. [2022-03-20 23:38:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 23:38:08,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:08,890 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:08,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 23:38:08,890 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 1 times [2022-03-20 23:38:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407185633] [2022-03-20 23:38:08,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash 958934784, now seen corresponding path program 2 times [2022-03-20 23:38:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227891847] [2022-03-20 23:38:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 23:38:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,128 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 23:38:09,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227891847] [2022-03-20 23:38:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227891847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:09,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:09,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:09,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407185633] [2022-03-20 23:38:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407185633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:09,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:09,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490964858] [2022-03-20 23:38:09,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:09,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:38:09,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:38:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:38:09,130 INFO L87 Difference]: Start difference. First operand 721 states and 927 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:11,318 INFO L93 Difference]: Finished difference Result 818 states and 1067 transitions. [2022-03-20 23:38:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:38:11,343 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 23:38:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:11,345 INFO L225 Difference]: With dead ends: 818 [2022-03-20 23:38:11,345 INFO L226 Difference]: Without dead ends: 741 [2022-03-20 23:38:11,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:38:11,346 INFO L913 BasicCegarLoop]: 508 mSDtfsCounter, 922 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:11,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1876 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3397 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 23:38:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-20 23:38:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 684. [2022-03-20 23:38:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 541 states have (on average 1.277264325323475) internal successors, (691), 556 states have internal predecessors, (691), 77 states have call successors, (77), 48 states have call predecessors, (77), 65 states have return successors, (98), 86 states have call predecessors, (98), 71 states have call successors, (98) [2022-03-20 23:38:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 866 transitions. [2022-03-20 23:38:11,554 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 866 transitions. Word has length 66 [2022-03-20 23:38:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:11,554 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 866 transitions. [2022-03-20 23:38:11,554 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 23:38:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 866 transitions. [2022-03-20 23:38:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 23:38:11,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:11,555 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:11,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 23:38:11,556 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 1 times [2022-03-20 23:38:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:11,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735330942] [2022-03-20 23:38:11,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -896433839, now seen corresponding path program 2 times [2022-03-20 23:38:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:11,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734230433] [2022-03-20 23:38:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 23:38:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,741 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 23:38:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734230433] [2022-03-20 23:38:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734230433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:11,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:11,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:11,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735330942] [2022-03-20 23:38:11,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735330942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:11,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:11,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300442674] [2022-03-20 23:38:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:11,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:11,744 INFO L87 Difference]: Start difference. First operand 684 states and 866 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:13,394 INFO L93 Difference]: Finished difference Result 769 states and 981 transitions. [2022-03-20 23:38:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:38:13,395 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 23:38:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:13,396 INFO L225 Difference]: With dead ends: 769 [2022-03-20 23:38:13,397 INFO L226 Difference]: Without dead ends: 730 [2022-03-20 23:38:13,397 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 23:38:13,397 INFO L913 BasicCegarLoop]: 451 mSDtfsCounter, 523 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:13,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1210 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-20 23:38:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 679. [2022-03-20 23:38:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 537 states have (on average 1.277467411545624) internal successors, (686), 552 states have internal predecessors, (686), 76 states have call successors, (76), 48 states have call predecessors, (76), 65 states have return successors, (97), 85 states have call predecessors, (97), 70 states have call successors, (97) [2022-03-20 23:38:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 859 transitions. [2022-03-20 23:38:13,601 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 859 transitions. Word has length 67 [2022-03-20 23:38:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:13,601 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 859 transitions. [2022-03-20 23:38:13,601 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 23:38:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 859 transitions. [2022-03-20 23:38:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 23:38:13,602 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:13,602 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:13,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 23:38:13,602 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 1 times [2022-03-20 23:38:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:13,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818815199] [2022-03-20 23:38:13,603 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:13,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1676375305, now seen corresponding path program 2 times [2022-03-20 23:38:13,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:13,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106711574] [2022-03-20 23:38:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:13,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,757 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 23:38:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106711574] [2022-03-20 23:38:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106711574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:13,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:13,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:13,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818815199] [2022-03-20 23:38:13,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818815199] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:13,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:13,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770426870] [2022-03-20 23:38:13,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:13,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:38:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:38:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:38:13,758 INFO L87 Difference]: Start difference. First operand 679 states and 859 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:15,059 INFO L93 Difference]: Finished difference Result 848 states and 1087 transitions. [2022-03-20 23:38:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:38:15,060 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 23:38:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:15,062 INFO L225 Difference]: With dead ends: 848 [2022-03-20 23:38:15,062 INFO L226 Difference]: Without dead ends: 836 [2022-03-20 23:38:15,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:15,062 INFO L913 BasicCegarLoop]: 470 mSDtfsCounter, 712 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:15,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 950 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:38:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-20 23:38:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 725. [2022-03-20 23:38:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2705061082024434) internal successors, (728), 590 states have internal predecessors, (728), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-03-20 23:38:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 911 transitions. [2022-03-20 23:38:15,296 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 911 transitions. Word has length 67 [2022-03-20 23:38:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:15,297 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 911 transitions. [2022-03-20 23:38:15,297 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 23:38:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 911 transitions. [2022-03-20 23:38:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 23:38:15,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:15,298 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:15,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 23:38:15,298 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 1 times [2022-03-20 23:38:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:15,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906405308] [2022-03-20 23:38:15,298 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash 871891881, now seen corresponding path program 2 times [2022-03-20 23:38:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:15,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178368749] [2022-03-20 23:38:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,467 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 23:38:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178368749] [2022-03-20 23:38:15,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178368749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:15,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906405308] [2022-03-20 23:38:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906405308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187769790] [2022-03-20 23:38:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:15,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:15,469 INFO L87 Difference]: Start difference. First operand 725 states and 911 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:17,428 INFO L93 Difference]: Finished difference Result 842 states and 1076 transitions. [2022-03-20 23:38:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:38:17,429 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 23:38:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:17,432 INFO L225 Difference]: With dead ends: 842 [2022-03-20 23:38:17,433 INFO L226 Difference]: Without dead ends: 833 [2022-03-20 23:38:17,447 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 23:38:17,449 INFO L913 BasicCegarLoop]: 472 mSDtfsCounter, 1726 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:17,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1046 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:38:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-20 23:38:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 725. [2022-03-20 23:38:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 573 states have (on average 1.2670157068062826) internal successors, (726), 590 states have internal predecessors, (726), 78 states have call successors, (78), 50 states have call predecessors, (78), 73 states have return successors, (105), 93 states have call predecessors, (105), 72 states have call successors, (105) [2022-03-20 23:38:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 909 transitions. [2022-03-20 23:38:17,729 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 909 transitions. Word has length 68 [2022-03-20 23:38:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:17,729 INFO L478 AbstractCegarLoop]: Abstraction has 725 states and 909 transitions. [2022-03-20 23:38:17,729 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 23:38:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 909 transitions. [2022-03-20 23:38:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 23:38:17,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:17,730 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:17,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 23:38:17,730 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 1 times [2022-03-20 23:38:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:17,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816270471] [2022-03-20 23:38:17,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 881211856, now seen corresponding path program 2 times [2022-03-20 23:38:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:17,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207776467] [2022-03-20 23:38:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:38:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-20 23:38:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,039 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 23:38:18,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:18,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207776467] [2022-03-20 23:38:18,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207776467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:18,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:18,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:18,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:18,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816270471] [2022-03-20 23:38:18,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816270471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:18,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:18,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298644739] [2022-03-20 23:38:18,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:18,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:38:18,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:38:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:18,041 INFO L87 Difference]: Start difference. First operand 725 states and 909 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 23:38:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:20,415 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2022-03-20 23:38:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 23:38:20,416 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 23:38:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:20,417 INFO L225 Difference]: With dead ends: 816 [2022-03-20 23:38:20,417 INFO L226 Difference]: Without dead ends: 791 [2022-03-20 23:38:20,418 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 23:38:20,418 INFO L913 BasicCegarLoop]: 458 mSDtfsCounter, 787 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 4941 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 5242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:20,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2725 Invalid, 5242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4941 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 23:38:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-20 23:38:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 723. [2022-03-20 23:38:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 572 states have (on average 1.2657342657342658) internal successors, (724), 589 states have internal predecessors, (724), 77 states have call successors, (77), 50 states have call predecessors, (77), 73 states have return successors, (104), 92 states have call predecessors, (104), 71 states have call successors, (104) [2022-03-20 23:38:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 905 transitions. [2022-03-20 23:38:20,656 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 905 transitions. Word has length 74 [2022-03-20 23:38:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:20,656 INFO L478 AbstractCegarLoop]: Abstraction has 723 states and 905 transitions. [2022-03-20 23:38:20,656 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 23:38:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 905 transitions. [2022-03-20 23:38:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 23:38:20,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:20,657 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:20,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 23:38:20,658 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:20,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 1 times [2022-03-20 23:38:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237653911] [2022-03-20 23:38:20,658 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:20,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1188604284, now seen corresponding path program 2 times [2022-03-20 23:38:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782858145] [2022-03-20 23:38:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 23:38:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,943 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 23:38:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:20,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782858145] [2022-03-20 23:38:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782858145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:20,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:20,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 23:38:20,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:20,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237653911] [2022-03-20 23:38:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237653911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:20,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:20,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 23:38:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746337025] [2022-03-20 23:38:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:20,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 23:38:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 23:38:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-20 23:38:20,946 INFO L87 Difference]: Start difference. First operand 723 states and 905 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 23:38:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:22,829 INFO L93 Difference]: Finished difference Result 797 states and 1008 transitions. [2022-03-20 23:38:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 23:38:22,830 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 23:38:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:22,832 INFO L225 Difference]: With dead ends: 797 [2022-03-20 23:38:22,832 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 23:38:22,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 23:38:22,834 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1479 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 5398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:22,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 2696 Invalid, 5398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 23:38:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 23:38:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 720. [2022-03-20 23:38:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 570 states have (on average 1.2649122807017543) internal successors, (721), 587 states have internal predecessors, (721), 76 states have call successors, (76), 50 states have call predecessors, (76), 73 states have return successors, (103), 91 states have call predecessors, (103), 70 states have call successors, (103) [2022-03-20 23:38:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 900 transitions. [2022-03-20 23:38:23,085 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 900 transitions. Word has length 70 [2022-03-20 23:38:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:23,085 INFO L478 AbstractCegarLoop]: Abstraction has 720 states and 900 transitions. [2022-03-20 23:38:23,085 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 23:38:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 900 transitions. [2022-03-20 23:38:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 23:38:23,087 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:23,087 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:23,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 23:38:23,087 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 1 times [2022-03-20 23:38:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:23,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269782545] [2022-03-20 23:38:23,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1748590526, now seen corresponding path program 2 times [2022-03-20 23:38:23,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:23,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137553530] [2022-03-20 23:38:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:23,351 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 23:38:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:23,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137553530] [2022-03-20 23:38:23,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137553530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:23,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:23,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:23,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269782545] [2022-03-20 23:38:23,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269782545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:23,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:23,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649212560] [2022-03-20 23:38:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:23,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:38:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:38:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:23,357 INFO L87 Difference]: Start difference. First operand 720 states and 900 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:24,925 INFO L93 Difference]: Finished difference Result 790 states and 998 transitions. [2022-03-20 23:38:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:38:24,926 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 23:38:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:24,927 INFO L225 Difference]: With dead ends: 790 [2022-03-20 23:38:24,927 INFO L226 Difference]: Without dead ends: 768 [2022-03-20 23:38:24,928 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 23:38:24,929 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 467 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 4408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:24,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2339 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-20 23:38:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2022-03-20 23:38:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 569 states have (on average 1.2636203866432338) internal successors, (719), 586 states have internal predecessors, (719), 75 states have call successors, (75), 50 states have call predecessors, (75), 73 states have return successors, (102), 90 states have call predecessors, (102), 69 states have call successors, (102) [2022-03-20 23:38:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2022-03-20 23:38:25,196 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 72 [2022-03-20 23:38:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:25,196 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2022-03-20 23:38:25,196 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 23:38:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2022-03-20 23:38:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:25,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:25,197 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:25,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 23:38:25,197 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 1 times [2022-03-20 23:38:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:25,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676184060] [2022-03-20 23:38:25,202 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1016702716, now seen corresponding path program 2 times [2022-03-20 23:38:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:25,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8515934] [2022-03-20 23:38:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:38:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:25,531 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 23:38:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8515934] [2022-03-20 23:38:25,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8515934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:25,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:25,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:25,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676184060] [2022-03-20 23:38:25,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676184060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:25,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:25,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558509230] [2022-03-20 23:38:25,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:25,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:38:25,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:38:25,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:25,533 INFO L87 Difference]: Start difference. First operand 718 states and 896 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:27,243 INFO L93 Difference]: Finished difference Result 785 states and 991 transitions. [2022-03-20 23:38:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:38:27,243 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 23:38:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:27,245 INFO L225 Difference]: With dead ends: 785 [2022-03-20 23:38:27,245 INFO L226 Difference]: Without dead ends: 754 [2022-03-20 23:38:27,245 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 23:38:27,247 INFO L913 BasicCegarLoop]: 440 mSDtfsCounter, 239 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 4537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:27,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2240 Invalid, 4537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:38:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-20 23:38:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 706. [2022-03-20 23:38:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 560 states have (on average 1.2642857142857142) internal successors, (708), 577 states have internal predecessors, (708), 73 states have call successors, (73), 50 states have call predecessors, (73), 72 states have return successors, (99), 87 states have call predecessors, (99), 67 states have call successors, (99) [2022-03-20 23:38:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 880 transitions. [2022-03-20 23:38:27,510 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 880 transitions. Word has length 69 [2022-03-20 23:38:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:27,510 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 880 transitions. [2022-03-20 23:38:27,510 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 23:38:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 880 transitions. [2022-03-20 23:38:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:27,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:27,512 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:27,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 23:38:27,512 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 1 times [2022-03-20 23:38:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:27,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768654069] [2022-03-20 23:38:27,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600916, now seen corresponding path program 2 times [2022-03-20 23:38:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:27,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134163917] [2022-03-20 23:38:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:38:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:27,664 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 23:38:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134163917] [2022-03-20 23:38:27,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134163917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:27,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:27,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:27,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768654069] [2022-03-20 23:38:27,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768654069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:27,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:27,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661822278] [2022-03-20 23:38:27,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:27,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:27,666 INFO L87 Difference]: Start difference. First operand 706 states and 880 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:28,872 INFO L93 Difference]: Finished difference Result 788 states and 988 transitions. [2022-03-20 23:38:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:38:28,872 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 23:38:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:28,874 INFO L225 Difference]: With dead ends: 788 [2022-03-20 23:38:28,874 INFO L226 Difference]: Without dead ends: 749 [2022-03-20 23:38:28,874 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 23:38:28,875 INFO L913 BasicCegarLoop]: 420 mSDtfsCounter, 491 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:28,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1071 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:38:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-20 23:38:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 701. [2022-03-20 23:38:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 556 states have (on average 1.264388489208633) internal successors, (703), 573 states have internal predecessors, (703), 72 states have call successors, (72), 50 states have call predecessors, (72), 72 states have return successors, (98), 86 states have call predecessors, (98), 66 states have call successors, (98) [2022-03-20 23:38:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 873 transitions. [2022-03-20 23:38:29,098 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 873 transitions. Word has length 69 [2022-03-20 23:38:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:29,098 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 873 transitions. [2022-03-20 23:38:29,098 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 23:38:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 873 transitions. [2022-03-20 23:38:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:29,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:29,099 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, 1, 1, 1] [2022-03-20 23:38:29,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 23:38:29,100 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 1 times [2022-03-20 23:38:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2145150793] [2022-03-20 23:38:29,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -51645449, now seen corresponding path program 2 times [2022-03-20 23:38:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185283061] [2022-03-20 23:38:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:38:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:38:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:29,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185283061] [2022-03-20 23:38:29,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185283061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:29,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:29,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2145150793] [2022-03-20 23:38:29,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2145150793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:29,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102209046] [2022-03-20 23:38:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:29,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 23:38:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 23:38:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 23:38:29,316 INFO L87 Difference]: Start difference. First operand 701 states and 873 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:30,615 INFO L93 Difference]: Finished difference Result 776 states and 976 transitions. [2022-03-20 23:38:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 23:38:30,615 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 23:38:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:30,617 INFO L225 Difference]: With dead ends: 776 [2022-03-20 23:38:30,617 INFO L226 Difference]: Without dead ends: 746 [2022-03-20 23:38:30,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-20 23:38:30,618 INFO L913 BasicCegarLoop]: 435 mSDtfsCounter, 705 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 3401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:30,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 2059 Invalid, 3401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:38:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-20 23:38:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 698. [2022-03-20 23:38:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 554 states have (on average 1.263537906137184) internal successors, (700), 571 states have internal predecessors, (700), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-20 23:38:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 868 transitions. [2022-03-20 23:38:30,855 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 868 transitions. Word has length 69 [2022-03-20 23:38:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:30,855 INFO L478 AbstractCegarLoop]: Abstraction has 698 states and 868 transitions. [2022-03-20 23:38:30,855 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 23:38:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 868 transitions. [2022-03-20 23:38:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:30,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:30,856 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:30,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 23:38:30,856 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 1 times [2022-03-20 23:38:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350896667] [2022-03-20 23:38:30,857 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 618518284, now seen corresponding path program 2 times [2022-03-20 23:38:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806309644] [2022-03-20 23:38:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:30,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:30,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:31,075 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 23:38:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806309644] [2022-03-20 23:38:31,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806309644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:31,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:31,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:31,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350896667] [2022-03-20 23:38:31,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350896667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:31,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:31,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833645185] [2022-03-20 23:38:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:31,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 23:38:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 23:38:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 23:38:31,077 INFO L87 Difference]: Start difference. First operand 698 states and 868 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:32,721 INFO L93 Difference]: Finished difference Result 756 states and 950 transitions. [2022-03-20 23:38:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 23:38:32,722 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 23:38:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:32,723 INFO L225 Difference]: With dead ends: 756 [2022-03-20 23:38:32,723 INFO L226 Difference]: Without dead ends: 750 [2022-03-20 23:38:32,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-20 23:38:32,724 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 789 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 4020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:32,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1669 Invalid, 4020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-20 23:38:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 695. [2022-03-20 23:38:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 551 states have (on average 1.2577132486388385) internal successors, (693), 568 states have internal predecessors, (693), 71 states have call successors, (71), 50 states have call predecessors, (71), 72 states have return successors, (97), 85 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-20 23:38:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 861 transitions. [2022-03-20 23:38:32,951 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 861 transitions. Word has length 69 [2022-03-20 23:38:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:32,951 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 861 transitions. [2022-03-20 23:38:32,951 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 23:38:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 861 transitions. [2022-03-20 23:38:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:32,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:32,952 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:32,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 23:38:32,952 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 1 times [2022-03-20 23:38:32,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218999921] [2022-03-20 23:38:32,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash 618241454, now seen corresponding path program 2 times [2022-03-20 23:38:32,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450475630] [2022-03-20 23:38:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:32,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:33,118 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 23:38:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450475630] [2022-03-20 23:38:33,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450475630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:33,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:33,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:33,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218999921] [2022-03-20 23:38:33,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218999921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:33,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:33,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:33,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137651563] [2022-03-20 23:38:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:33,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:33,120 INFO L87 Difference]: Start difference. First operand 695 states and 861 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:38:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:34,592 INFO L93 Difference]: Finished difference Result 805 states and 1014 transitions. [2022-03-20 23:38:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:38:34,592 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 23:38:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:34,594 INFO L225 Difference]: With dead ends: 805 [2022-03-20 23:38:34,594 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 23:38:34,595 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 23:38:34,595 INFO L913 BasicCegarLoop]: 434 mSDtfsCounter, 1617 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:34,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 925 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:38:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 23:38:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 666. [2022-03-20 23:38:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 527 states have (on average 1.256166982922201) internal successors, (662), 543 states have internal predecessors, (662), 70 states have call successors, (70), 49 states have call predecessors, (70), 68 states have return successors, (93), 81 states have call predecessors, (93), 64 states have call successors, (93) [2022-03-20 23:38:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 825 transitions. [2022-03-20 23:38:34,842 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 825 transitions. Word has length 69 [2022-03-20 23:38:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:34,842 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 825 transitions. [2022-03-20 23:38:34,842 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 23:38:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 825 transitions. [2022-03-20 23:38:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 23:38:34,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:34,844 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:34,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 23:38:34,844 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 1 times [2022-03-20 23:38:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969543197] [2022-03-20 23:38:34,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 711441589, now seen corresponding path program 2 times [2022-03-20 23:38:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301900369] [2022-03-20 23:38:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:34,997 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 23:38:34,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301900369] [2022-03-20 23:38:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301900369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:34,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:34,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969543197] [2022-03-20 23:38:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969543197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:34,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607790944] [2022-03-20 23:38:34,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:34,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:38:34,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:38:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:38:34,998 INFO L87 Difference]: Start difference. First operand 666 states and 825 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:36,100 INFO L93 Difference]: Finished difference Result 740 states and 928 transitions. [2022-03-20 23:38:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:38:36,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-03-20 23:38:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:36,102 INFO L225 Difference]: With dead ends: 740 [2022-03-20 23:38:36,102 INFO L226 Difference]: Without dead ends: 700 [2022-03-20 23:38:36,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:36,103 INFO L913 BasicCegarLoop]: 431 mSDtfsCounter, 608 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:36,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 821 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-20 23:38:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-03-20 23:38:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2490272373540856) internal successors, (642), 529 states have internal predecessors, (642), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-03-20 23:38:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 800 transitions. [2022-03-20 23:38:36,322 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 800 transitions. Word has length 69 [2022-03-20 23:38:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:36,322 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 800 transitions. [2022-03-20 23:38:36,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 800 transitions. [2022-03-20 23:38:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 23:38:36,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:36,323 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:36,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 23:38:36,323 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 1 times [2022-03-20 23:38:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083205515] [2022-03-20 23:38:36,324 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -645591887, now seen corresponding path program 2 times [2022-03-20 23:38:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926882736] [2022-03-20 23:38:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 23:38:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:36,498 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 23:38:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:36,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926882736] [2022-03-20 23:38:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926882736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:36,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:36,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:36,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083205515] [2022-03-20 23:38:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083205515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:36,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877674438] [2022-03-20 23:38:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:36,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:38:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:38:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:36,499 INFO L87 Difference]: Start difference. First operand 648 states and 800 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 23:38:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:37,897 INFO L93 Difference]: Finished difference Result 738 states and 917 transitions. [2022-03-20 23:38:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:38:37,897 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 23:38:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:37,915 INFO L225 Difference]: With dead ends: 738 [2022-03-20 23:38:37,915 INFO L226 Difference]: Without dead ends: 700 [2022-03-20 23:38:37,916 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 23:38:37,916 INFO L913 BasicCegarLoop]: 419 mSDtfsCounter, 273 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:37,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1251 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:38:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-20 23:38:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 648. [2022-03-20 23:38:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 514 states have (on average 1.2470817120622568) internal successors, (641), 529 states have internal predecessors, (641), 69 states have call successors, (69), 48 states have call predecessors, (69), 64 states have return successors, (89), 77 states have call predecessors, (89), 63 states have call successors, (89) [2022-03-20 23:38:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 799 transitions. [2022-03-20 23:38:38,220 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 799 transitions. Word has length 71 [2022-03-20 23:38:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:38,220 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 799 transitions. [2022-03-20 23:38:38,220 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 23:38:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 799 transitions. [2022-03-20 23:38:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 23:38:38,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:38,221 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:38,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 23:38:38,222 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 1 times [2022-03-20 23:38:38,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:38,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12050498] [2022-03-20 23:38:38,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1405392111, now seen corresponding path program 2 times [2022-03-20 23:38:38,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:38,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483611477] [2022-03-20 23:38:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:38,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 23:38:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:38,467 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 23:38:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483611477] [2022-03-20 23:38:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483611477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:38,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:38,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:38,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12050498] [2022-03-20 23:38:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12050498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:38,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:38,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348492519] [2022-03-20 23:38:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:38,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:38:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:38:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:38,468 INFO L87 Difference]: Start difference. First operand 648 states and 799 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 23:38:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:40,521 INFO L93 Difference]: Finished difference Result 736 states and 923 transitions. [2022-03-20 23:38:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 23:38:40,521 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 23:38:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:40,523 INFO L225 Difference]: With dead ends: 736 [2022-03-20 23:38:40,523 INFO L226 Difference]: Without dead ends: 698 [2022-03-20 23:38:40,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-20 23:38:40,523 INFO L913 BasicCegarLoop]: 429 mSDtfsCounter, 936 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2452 SdHoareTripleChecker+Invalid, 4330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:40,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2452 Invalid, 4330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 23:38:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-20 23:38:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 643. [2022-03-20 23:38:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 510 states have (on average 1.2431372549019608) internal successors, (634), 525 states have internal predecessors, (634), 68 states have call successors, (68), 48 states have call predecessors, (68), 64 states have return successors, (87), 76 states have call predecessors, (87), 62 states have call successors, (87) [2022-03-20 23:38:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 789 transitions. [2022-03-20 23:38:40,741 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 789 transitions. Word has length 71 [2022-03-20 23:38:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:40,741 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 789 transitions. [2022-03-20 23:38:40,741 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 23:38:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 789 transitions. [2022-03-20 23:38:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 23:38:40,742 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:40,742 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:40,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 23:38:40,742 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 1 times [2022-03-20 23:38:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:40,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807350735] [2022-03-20 23:38:40,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1361964370, now seen corresponding path program 2 times [2022-03-20 23:38:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:40,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532724412] [2022-03-20 23:38:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 23:38:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:40,892 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 23:38:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532724412] [2022-03-20 23:38:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532724412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:40,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:40,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:40,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807350735] [2022-03-20 23:38:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807350735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:40,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:40,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156822582] [2022-03-20 23:38:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:40,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:38:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:38:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:40,893 INFO L87 Difference]: Start difference. First operand 643 states and 789 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 23:38:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:42,211 INFO L93 Difference]: Finished difference Result 731 states and 903 transitions. [2022-03-20 23:38:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:38:42,211 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 23:38:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:42,213 INFO L225 Difference]: With dead ends: 731 [2022-03-20 23:38:42,213 INFO L226 Difference]: Without dead ends: 687 [2022-03-20 23:38:42,213 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 23:38:42,213 INFO L913 BasicCegarLoop]: 408 mSDtfsCounter, 451 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:42,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1388 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:38:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-20 23:38:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 637. [2022-03-20 23:38:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 505 states have (on average 1.2435643564356436) internal successors, (628), 520 states have internal predecessors, (628), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-03-20 23:38:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 781 transitions. [2022-03-20 23:38:42,446 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 781 transitions. Word has length 71 [2022-03-20 23:38:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:42,446 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 781 transitions. [2022-03-20 23:38:42,446 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 23:38:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 781 transitions. [2022-03-20 23:38:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 23:38:42,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:42,447 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:42,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 23:38:42,447 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 1 times [2022-03-20 23:38:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:42,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265940643] [2022-03-20 23:38:42,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 696849523, now seen corresponding path program 2 times [2022-03-20 23:38:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:42,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664680799] [2022-03-20 23:38:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:42,717 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 23:38:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664680799] [2022-03-20 23:38:42,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664680799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:42,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:42,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:42,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265940643] [2022-03-20 23:38:42,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265940643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:42,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:42,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 23:38:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045641163] [2022-03-20 23:38:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:42,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 23:38:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:42,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 23:38:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 23:38:42,718 INFO L87 Difference]: Start difference. First operand 637 states and 781 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:44,409 INFO L93 Difference]: Finished difference Result 868 states and 1068 transitions. [2022-03-20 23:38:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 23:38:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-03-20 23:38:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:44,411 INFO L225 Difference]: With dead ends: 868 [2022-03-20 23:38:44,411 INFO L226 Difference]: Without dead ends: 729 [2022-03-20 23:38:44,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-20 23:38:44,412 INFO L913 BasicCegarLoop]: 382 mSDtfsCounter, 562 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 3133 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:44,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1931 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3133 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-20 23:38:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 643. [2022-03-20 23:38:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 511 states have (on average 1.2328767123287672) internal successors, (630), 526 states have internal predecessors, (630), 67 states have call successors, (67), 48 states have call predecessors, (67), 64 states have return successors, (86), 75 states have call predecessors, (86), 61 states have call successors, (86) [2022-03-20 23:38:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 783 transitions. [2022-03-20 23:38:44,632 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 783 transitions. Word has length 71 [2022-03-20 23:38:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:44,632 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 783 transitions. [2022-03-20 23:38:44,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 23:38:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 783 transitions. [2022-03-20 23:38:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 23:38:44,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:44,633 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:44,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 23:38:44,634 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:44,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:44,634 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 1 times [2022-03-20 23:38:44,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:44,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499595541] [2022-03-20 23:38:44,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:44,634 INFO L85 PathProgramCache]: Analyzing trace with hash -403390025, now seen corresponding path program 2 times [2022-03-20 23:38:44,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:44,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560651689] [2022-03-20 23:38:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:44,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:44,808 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 23:38:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560651689] [2022-03-20 23:38:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560651689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:44,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:44,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499595541] [2022-03-20 23:38:44,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499595541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:44,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:44,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:44,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803358999] [2022-03-20 23:38:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:44,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:38:44,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:38:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:44,814 INFO L87 Difference]: Start difference. First operand 643 states and 783 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 23:38:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:46,013 INFO L93 Difference]: Finished difference Result 731 states and 897 transitions. [2022-03-20 23:38:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:38:46,014 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 23:38:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:46,015 INFO L225 Difference]: With dead ends: 731 [2022-03-20 23:38:46,015 INFO L226 Difference]: Without dead ends: 681 [2022-03-20 23:38:46,016 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 23:38:46,016 INFO L913 BasicCegarLoop]: 399 mSDtfsCounter, 614 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:46,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1229 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-20 23:38:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 631. [2022-03-20 23:38:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 500 states have (on average 1.228) internal successors, (614), 515 states have internal predecessors, (614), 66 states have call successors, (66), 48 states have call predecessors, (66), 64 states have return successors, (85), 74 states have call predecessors, (85), 60 states have call successors, (85) [2022-03-20 23:38:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 765 transitions. [2022-03-20 23:38:46,253 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 765 transitions. Word has length 73 [2022-03-20 23:38:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:46,253 INFO L478 AbstractCegarLoop]: Abstraction has 631 states and 765 transitions. [2022-03-20 23:38:46,253 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 23:38:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 765 transitions. [2022-03-20 23:38:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 23:38:46,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:46,254 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:46,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 23:38:46,254 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 1 times [2022-03-20 23:38:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327338721] [2022-03-20 23:38:46,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1773843285, now seen corresponding path program 2 times [2022-03-20 23:38:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185916395] [2022-03-20 23:38:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:46,607 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 23:38:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185916395] [2022-03-20 23:38:46,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185916395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:46,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:46,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:46,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327338721] [2022-03-20 23:38:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327338721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:46,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:46,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630519206] [2022-03-20 23:38:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:46,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:38:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:38:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:46,614 INFO L87 Difference]: Start difference. First operand 631 states and 765 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 23:38:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:49,888 INFO L93 Difference]: Finished difference Result 1532 states and 1866 transitions. [2022-03-20 23:38:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 23:38:49,888 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 23:38:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:49,892 INFO L225 Difference]: With dead ends: 1532 [2022-03-20 23:38:49,892 INFO L226 Difference]: Without dead ends: 1385 [2022-03-20 23:38:49,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=676, Invalid=2630, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 23:38:49,893 INFO L913 BasicCegarLoop]: 418 mSDtfsCounter, 3349 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 4782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:49,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 1381 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 23:38:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-03-20 23:38:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1006. [2022-03-20 23:38:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 801 states have (on average 1.2459425717852683) internal successors, (998), 826 states have internal predecessors, (998), 101 states have call successors, (101), 79 states have call predecessors, (101), 103 states have return successors, (136), 107 states have call predecessors, (136), 95 states have call successors, (136) [2022-03-20 23:38:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1235 transitions. [2022-03-20 23:38:50,256 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1235 transitions. Word has length 73 [2022-03-20 23:38:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:50,257 INFO L478 AbstractCegarLoop]: Abstraction has 1006 states and 1235 transitions. [2022-03-20 23:38:50,257 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 23:38:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1235 transitions. [2022-03-20 23:38:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 23:38:50,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:50,258 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:50,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 23:38:50,258 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 1 times [2022-03-20 23:38:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1340039087] [2022-03-20 23:38:50,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1094571031, now seen corresponding path program 2 times [2022-03-20 23:38:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793002554] [2022-03-20 23:38:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:50,430 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 23:38:50,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793002554] [2022-03-20 23:38:50,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793002554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:50,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:50,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:50,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1340039087] [2022-03-20 23:38:50,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1340039087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:50,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:50,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565126029] [2022-03-20 23:38:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:50,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:38:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:38:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:38:50,431 INFO L87 Difference]: Start difference. First operand 1006 states and 1235 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 23:38:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:52,593 INFO L93 Difference]: Finished difference Result 1405 states and 1720 transitions. [2022-03-20 23:38:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 23:38:52,593 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 23:38:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:52,596 INFO L225 Difference]: With dead ends: 1405 [2022-03-20 23:38:52,596 INFO L226 Difference]: Without dead ends: 1275 [2022-03-20 23:38:52,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-03-20 23:38:52,611 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1989 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:52,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1330 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:38:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-20 23:38:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1099. [2022-03-20 23:38:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 874 states have (on average 1.2356979405034325) internal successors, (1080), 894 states have internal predecessors, (1080), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-03-20 23:38:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1347 transitions. [2022-03-20 23:38:53,097 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1347 transitions. Word has length 73 [2022-03-20 23:38:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:53,097 INFO L478 AbstractCegarLoop]: Abstraction has 1099 states and 1347 transitions. [2022-03-20 23:38:53,097 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 23:38:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1347 transitions. [2022-03-20 23:38:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 23:38:53,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:53,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:53,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 23:38:53,099 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 1 times [2022-03-20 23:38:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:53,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004818969] [2022-03-20 23:38:53,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2057821935, now seen corresponding path program 2 times [2022-03-20 23:38:53,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:53,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32263004] [2022-03-20 23:38:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 23:38:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:53,379 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 23:38:53,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32263004] [2022-03-20 23:38:53,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32263004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:53,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:53,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:53,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:53,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004818969] [2022-03-20 23:38:53,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004818969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:53,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:53,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:53,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650657671] [2022-03-20 23:38:53,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:53,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:38:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:38:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:53,381 INFO L87 Difference]: Start difference. First operand 1099 states and 1347 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 23:38:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:55,344 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2022-03-20 23:38:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 23:38:55,344 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 23:38:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:55,347 INFO L225 Difference]: With dead ends: 1233 [2022-03-20 23:38:55,347 INFO L226 Difference]: Without dead ends: 1191 [2022-03-20 23:38:55,347 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 23:38:55,347 INFO L913 BasicCegarLoop]: 397 mSDtfsCounter, 790 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:55,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2285 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 3514 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 23:38:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-03-20 23:38:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1095. [2022-03-20 23:38:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 870 states have (on average 1.2344827586206897) internal successors, (1074), 890 states have internal predecessors, (1074), 115 states have call successors, (115), 83 states have call predecessors, (115), 109 states have return successors, (152), 126 states have call predecessors, (152), 109 states have call successors, (152) [2022-03-20 23:38:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1341 transitions. [2022-03-20 23:38:55,797 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1341 transitions. Word has length 77 [2022-03-20 23:38:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:55,797 INFO L478 AbstractCegarLoop]: Abstraction has 1095 states and 1341 transitions. [2022-03-20 23:38:55,797 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 23:38:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1341 transitions. [2022-03-20 23:38:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 23:38:55,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:55,799 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:55,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 23:38:55,799 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 1 times [2022-03-20 23:38:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:55,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668081063] [2022-03-20 23:38:55,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1891319547, now seen corresponding path program 2 times [2022-03-20 23:38:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:55,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534439984] [2022-03-20 23:38:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 23:38:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:55,997 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 23:38:55,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:55,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534439984] [2022-03-20 23:38:55,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534439984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:55,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:55,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:55,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:55,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668081063] [2022-03-20 23:38:55,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668081063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:55,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:55,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:38:55,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259370868] [2022-03-20 23:38:55,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:55,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:38:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:38:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:38:55,998 INFO L87 Difference]: Start difference. First operand 1095 states and 1341 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 23:38:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:57,286 INFO L93 Difference]: Finished difference Result 1230 states and 1517 transitions. [2022-03-20 23:38:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:38:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-03-20 23:38:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:57,289 INFO L225 Difference]: With dead ends: 1230 [2022-03-20 23:38:57,289 INFO L226 Difference]: Without dead ends: 1131 [2022-03-20 23:38:57,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-03-20 23:38:57,290 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 398 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:57,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 958 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:38:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-03-20 23:38:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1061. [2022-03-20 23:38:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 842 states have (on average 1.2304038004750595) internal successors, (1036), 862 states have internal predecessors, (1036), 109 states have call successors, (109), 83 states have call predecessors, (109), 109 states have return successors, (144), 120 states have call predecessors, (144), 103 states have call successors, (144) [2022-03-20 23:38:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1289 transitions. [2022-03-20 23:38:57,686 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1289 transitions. Word has length 78 [2022-03-20 23:38:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:57,687 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1289 transitions. [2022-03-20 23:38:57,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 23:38:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1289 transitions. [2022-03-20 23:38:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 23:38:57,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:57,688 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:57,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 23:38:57,688 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 1 times [2022-03-20 23:38:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:57,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112763409] [2022-03-20 23:38:57,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -888306664, now seen corresponding path program 2 times [2022-03-20 23:38:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:57,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705689249] [2022-03-20 23:38:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:38:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 23:38:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:57,894 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 23:38:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705689249] [2022-03-20 23:38:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705689249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:57,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:57,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:57,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112763409] [2022-03-20 23:38:57,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112763409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:57,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:57,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865808500] [2022-03-20 23:38:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:57,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:38:57,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:38:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:38:57,895 INFO L87 Difference]: Start difference. First operand 1061 states and 1289 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 23:38:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:59,169 INFO L93 Difference]: Finished difference Result 1156 states and 1411 transitions. [2022-03-20 23:38:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:38:59,169 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 23:38:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:59,171 INFO L225 Difference]: With dead ends: 1156 [2022-03-20 23:38:59,171 INFO L226 Difference]: Without dead ends: 1065 [2022-03-20 23:38:59,183 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 23:38:59,183 INFO L913 BasicCegarLoop]: 346 mSDtfsCounter, 498 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:59,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1422 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-03-20 23:38:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1013. [2022-03-20 23:38:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 808 states have (on average 1.2326732673267327) internal successors, (996), 828 states have internal predecessors, (996), 99 states have call successors, (99), 79 states have call predecessors, (99), 105 states have return successors, (132), 110 states have call predecessors, (132), 93 states have call successors, (132) [2022-03-20 23:38:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1227 transitions. [2022-03-20 23:38:59,544 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1227 transitions. Word has length 75 [2022-03-20 23:38:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:59,544 INFO L478 AbstractCegarLoop]: Abstraction has 1013 states and 1227 transitions. [2022-03-20 23:38:59,544 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 23:38:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1227 transitions. [2022-03-20 23:38:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 23:38:59,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:59,546 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:59,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 23:38:59,546 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 1 times [2022-03-20 23:38:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347423473] [2022-03-20 23:38:59,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 384049071, now seen corresponding path program 2 times [2022-03-20 23:38:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095007192] [2022-03-20 23:38:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 23:38:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 23:38:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 23:38:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:59,688 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 23:38:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095007192] [2022-03-20 23:38:59,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095007192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:59,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:59,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:59,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347423473] [2022-03-20 23:38:59,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347423473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:59,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:59,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019239834] [2022-03-20 23:38:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:59,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:59,689 INFO L87 Difference]: Start difference. First operand 1013 states and 1227 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 23:39:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:39:00,720 INFO L93 Difference]: Finished difference Result 1110 states and 1349 transitions. [2022-03-20 23:39:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:39:00,720 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 23:39:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:39:00,722 INFO L225 Difference]: With dead ends: 1110 [2022-03-20 23:39:00,722 INFO L226 Difference]: Without dead ends: 1049 [2022-03-20 23:39:00,722 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 23:39:00,722 INFO L913 BasicCegarLoop]: 331 mSDtfsCounter, 579 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:39:00,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 1001 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 23:39:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-03-20 23:39:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 997. [2022-03-20 23:39:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 794 states have (on average 1.2317380352644836) internal successors, (978), 814 states have internal predecessors, (978), 97 states have call successors, (97), 79 states have call predecessors, (97), 105 states have return successors, (128), 108 states have call predecessors, (128), 91 states have call successors, (128) [2022-03-20 23:39:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2022-03-20 23:39:01,050 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 73 [2022-03-20 23:39:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:39:01,050 INFO L478 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2022-03-20 23:39:01,050 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 23:39:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2022-03-20 23:39:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 23:39:01,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:39:01,053 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:01,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 23:39:01,053 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:39:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:39:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 1 times [2022-03-20 23:39:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:39:01,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124747536] [2022-03-20 23:39:01,054 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:39:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash -644807577, now seen corresponding path program 2 times [2022-03-20 23:39:01,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:39:01,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153152610] [2022-03-20 23:39:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:39:01,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:39:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 23:39:01,065 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 23:39:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 23:39:01,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 23:39:01,117 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 23:39:01,117 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 23:39:01,119 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 23:39:01,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 23:39:01,123 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-20 23:39:01,125 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 23:39:01,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:39:01 BoogieIcfgContainer [2022-03-20 23:39:01,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 23:39:01,145 INFO L158 Benchmark]: Toolchain (without parser) took 155603.15ms. Allocated memory was 186.6MB in the beginning and 933.2MB in the end (delta: 746.6MB). Free memory was 129.3MB in the beginning and 499.0MB in the end (delta: -369.6MB). Peak memory consumption was 377.6MB. Max. memory is 8.0GB. [2022-03-20 23:39:01,145 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 186.6MB. Free memory is still 147.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 23:39:01,146 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.00ms. Allocated memory was 186.6MB in the beginning and 237.0MB in the end (delta: 50.3MB). Free memory was 129.2MB in the beginning and 190.3MB in the end (delta: -61.1MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. [2022-03-20 23:39:01,146 INFO L158 Benchmark]: Boogie Preprocessor took 94.35ms. Allocated memory is still 237.0MB. Free memory was 190.3MB in the beginning and 185.3MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-03-20 23:39:01,146 INFO L158 Benchmark]: RCFGBuilder took 934.24ms. Allocated memory is still 237.0MB. Free memory was 185.3MB in the beginning and 173.2MB in the end (delta: 12.2MB). Peak memory consumption was 41.7MB. Max. memory is 8.0GB. [2022-03-20 23:39:01,146 INFO L158 Benchmark]: TraceAbstraction took 154154.60ms. Allocated memory was 237.0MB in the beginning and 933.2MB in the end (delta: 696.3MB). Free memory was 172.7MB in the beginning and 499.0MB in the end (delta: -326.3MB). Peak memory consumption was 370.5MB. Max. memory is 8.0GB. [2022-03-20 23:39:01,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 186.6MB. Free memory is still 147.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 415.00ms. Allocated memory was 186.6MB in the beginning and 237.0MB in the end (delta: 50.3MB). Free memory was 129.2MB in the beginning and 190.3MB in the end (delta: -61.1MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 94.35ms. Allocated memory is still 237.0MB. Free memory was 190.3MB in the beginning and 185.3MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 934.24ms. Allocated memory is still 237.0MB. Free memory was 185.3MB in the beginning and 173.2MB in the end (delta: 12.2MB). Peak memory consumption was 41.7MB. Max. memory is 8.0GB. * TraceAbstraction took 154154.60ms. Allocated memory was 237.0MB in the beginning and 933.2MB in the end (delta: 696.3MB). Free memory was 172.7MB in the beginning and 499.0MB in the end (delta: -326.3MB). Peak memory consumption was 370.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 59]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int s ; [L33] int UNLOADED ; [L34] int NP ; [L35] int DC ; [L36] int SKIP1 ; [L37] int SKIP2 ; [L38] int MPR1 ; [L39] int MPR3 ; [L40] int IPC ; [L41] int pended ; [L42] int compFptr ; [L43] int compRegistered ; [L44] int lowerDriverReturn ; [L45] int setEventCalled ; [L46] int customIrp ; [L47] int routine ; [L48] int myStatus ; [L49] int pirp ; [L50] int Executive ; [L51] int Suspended ; [L52] int KernelMode ; [L53] int DeviceUsageTypePaging ; [L1718] int pirp__IoStatus__Status ; [L1719] int d = __VERIFIER_nondet_int() ; [L1720] int status = __VERIFIER_nondet_int() ; [L1721] int irp = __VERIFIER_nondet_int() ; [L1722] int we_should_unload = __VERIFIER_nondet_int() ; [L1723] int irp_choice = __VERIFIER_nondet_int() ; [L1724] int devobj = __VERIFIER_nondet_int() ; [L1725] int __cil_tmp9 ; [L1730] s = 0 [L1731] UNLOADED = 0 [L1732] NP = 0 [L1733] DC = 0 [L1734] SKIP1 = 0 [L1735] SKIP2 = 0 [L1736] MPR1 = 0 [L1737] MPR3 = 0 [L1738] IPC = 0 [L1739] pended = 0 [L1740] compFptr = 0 [L1741] compRegistered = 0 [L1742] lowerDriverReturn = 0 [L1743] setEventCalled = 0 [L1744] customIrp = 0 [L1745] routine = 0 [L1746] myStatus = 0 [L1747] pirp = 0 [L1748] Executive = 0 [L1749] Suspended = 5 [L1750] KernelMode = 0 [L1751] DeviceUsageTypePaging = 1 [L1754] pirp = irp [L1755] CALL _BLAST_init() [L67] UNLOADED = 0 [L68] NP = 1 [L69] DC = 2 [L70] SKIP1 = 3 [L71] SKIP2 = 4 [L72] MPR1 = 5 [L73] MPR3 = 6 [L74] IPC = 7 [L75] s = UNLOADED [L76] pended = 0 [L77] compFptr = 0 [L78] compRegistered = 0 [L79] lowerDriverReturn = 0 [L80] setEventCalled = 0 [L81] customIrp = 0 [L1755] RET _BLAST_init() [L1757] COND TRUE status >= 0 [L1758] s = NP [L1759] customIrp = 0 [L1760] setEventCalled = customIrp [L1761] lowerDriverReturn = setEventCalled [L1762] compRegistered = lowerDriverReturn [L1763] compFptr = compRegistered [L1764] pended = compFptr [L1765] pirp__IoStatus__Status = 0 [L1766] myStatus = 0 [L1767] COND TRUE irp_choice == 0 [L1768] pirp__IoStatus__Status = -1073741637 [L1769] myStatus = -1073741637 [L1772] CALL stub_driver_init() [L1707] s = NP [L1708] customIrp = 0 [L1709] setEventCalled = customIrp [L1710] lowerDriverReturn = setEventCalled [L1711] compRegistered = lowerDriverReturn [L1712] compFptr = compRegistered [L1713] pended = compFptr [L1772] RET stub_driver_init() [L1775] COND FALSE !(status < 0) [L1779] int tmp_ndt_1; [L1780] tmp_ndt_1 = __VERIFIER_nondet_int() [L1781] COND TRUE tmp_ndt_1 == 2 [L1798] CALL, EXPR CdAudioDeviceControl(devobj, pirp) [L313] int deviceExtension__Active = __VERIFIER_nondet_int() ; [L314] int status ; [L317] COND FALSE !(deviceExtension__Active == 2) [L320] COND FALSE !(deviceExtension__Active == 3) [L323] COND FALSE !(deviceExtension__Active == 1) [L326] COND TRUE deviceExtension__Active == 7 [L348] CALL, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L1591] int currentIrpStack__Parameters__DeviceIoControl__IoControlCode = __VERIFIER_nondet_int() ; [L1592] int deviceExtension__TargetDeviceObject = __VERIFIER_nondet_int() ; [L1593] int irpSp__Control ; [L1594] int tmp ; [L1595] int tmp___0 ; [L1596] int __cil_tmp8 ; [L1597] int __cil_tmp9 ; [L1598] int __cil_tmp10 ; [L1599] int __cil_tmp11 ; [L1600] int __cil_tmp12 ; [L1604] __cil_tmp8 = 56 [L1605] __cil_tmp9 = 16384 [L1606] __cil_tmp10 = 131072 [L1607] __cil_tmp11 = 147456 [L1608] __cil_tmp12 = 147512 [L1609] COND TRUE currentIrpStack__Parameters__DeviceIoControl__IoControlCode == __cil_tmp12 [L1610] COND FALSE !(s != NP) [L1615] COND FALSE !(compRegistered != 0) [L1620] compRegistered = 1 [L1621] routine = 0 [L1625] irpSp__Control = 224 [L1626] CALL, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1900] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1901] int returnVal2 ; [L1902] int compRetStatus ; [L1903] int lcontext = __VERIFIER_nondet_int() ; [L1904] unsigned long __cil_tmp8 ; [L1907] COND TRUE \read(compRegistered) [L1908] COND TRUE routine == 0 [L1910] CALL, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1569] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1570] int Irp__AssociatedIrp__SystemBuffer = __VERIFIER_nondet_int() ; [L1573] COND TRUE \read(Irp__PendingReturned) [L1574] COND TRUE pended == 0 [L1575] pended = 1 [L1582] COND FALSE !(myStatus >= 0) [L1587] return (myStatus); [L1910] RET, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) [L1910] compRetStatus = HPCdrCompletion(DeviceObject, Irp, lcontext) [L1920] __cil_tmp8 = (unsigned long )compRetStatus [L1921] COND FALSE !(__cil_tmp8 == -1073741802) [L1928] COND FALSE !(\read(Irp__PendingReturned)) [L1931] int tmp_ndt_4; [L1932] tmp_ndt_4 = __VERIFIER_nondet_int() [L1933] COND TRUE tmp_ndt_4 == 0 [L1944] returnVal2 = 0 [L1958] COND TRUE s == NP [L1959] s = IPC [L1960] lowerDriverReturn = returnVal2 [L1981] return (returnVal2); [L1626] RET, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1626] tmp = IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1628] return (tmp); [L348] RET, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L348] status = CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L363] return (status); [L1798] RET, EXPR CdAudioDeviceControl(devobj, pirp) [L1798] status = CdAudioDeviceControl(devobj, pirp) [L1819] COND FALSE !(\read(we_should_unload)) [L1825] COND TRUE pended == 1 [L1826] COND FALSE !(s == NP) [L1833] COND TRUE pended == 1 [L1834] COND FALSE !(s == MPR3) [L1841] COND TRUE s != UNLOADED [L1842] COND TRUE status != -1 [L1843] COND TRUE s != SKIP2 [L1844] COND FALSE !(s != IPC) [L1857] COND FALSE !(pended != 1) [L1869] COND TRUE status != 259 [L1871] CALL errorFn() [L59] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 520 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 154.1s, OverallIterations: 70, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 124.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76322 SdHoareTripleChecker+Valid, 92.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75908 mSDsluCounter, 118939 SdHoareTripleChecker+Invalid, 78.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78995 mSDsCounter, 26418 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 183596 IncrementalHoareTripleChecker+Invalid, 210014 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26418 mSolverCounterUnsat, 39944 mSDtfsCounter, 183596 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1975 GetRequests, 825 SyntacticMatches, 18 SemanticMatches, 1132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 15.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1099occurred in iteration=65, InterpolantAutomatonStates: 922, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.8s AutomataMinimizationTime, 69 MinimizatonAttempts, 8291 StatesRemovedByMinimization, 69 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 23:39:01,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...