/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/floppy_simpl3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:44:23,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:44:23,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:44:23,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:44:23,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-07 00:44:23,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-07 00:44:23,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-07 00:44:23,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-07 00:44:23,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-07 00:44:23,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-07 00:44:23,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-07 00:44:23,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-07 00:44:23,910 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-07 00:44:23,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-07 00:44:23,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-07 00:44:23,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-07 00:44:23,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-07 00:44:23,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-07 00:44:23,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:44:23,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:44:23,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:44:23,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:44:23,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:44:23,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:44:23,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:44:23,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:44:23,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:44:23,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:44:23,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:44:23,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:44:23,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:44:23,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:44:23,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:44:23,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:44:23,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:44:23,944 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:44:23,944 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:44:23,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:44:23,944 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:44:23,944 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:44:24,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:44:24,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:44:24,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:44:24,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:44:24,164 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:44:24,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-04-07 00:44:24,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a076d92d/f0b8f9bc72be43f1b2ea00fe2d2a4936/FLAG4440aca27 [2022-04-07 00:44:24,614 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:44:24,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-04-07 00:44:24,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a076d92d/f0b8f9bc72be43f1b2ea00fe2d2a4936/FLAG4440aca27 [2022-04-07 00:44:25,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a076d92d/f0b8f9bc72be43f1b2ea00fe2d2a4936 [2022-04-07 00:44:25,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:44:25,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:44:25,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:44:25,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:44:25,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:44:25,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c80bde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25, skipping insertion in model container [2022-04-07 00:44:25,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:44:25,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:44:25,211 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/floppy_simpl3.cil-2.c[2713,2726] [2022-04-07 00:44:25,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:44:25,307 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:44:25,339 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/floppy_simpl3.cil-2.c[2713,2726] [2022-04-07 00:44:25,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:44:25,434 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:44:25,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25 WrapperNode [2022-04-07 00:44:25,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:44:25,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:44:25,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:44:25,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:44:25,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:44:25,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:44:25,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:44:25,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:44:25,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (1/1) ... [2022-04-07 00:44:25,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:44:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:44:25,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-07 00:44:25,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-07 00:44:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-04-07 00:44:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-04-07 00:44:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-04-07 00:44:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-04-07 00:44:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-04-07 00:44:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-07 00:44:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-07 00:44:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-07 00:44:25,589 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-04-07 00:44:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:44:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:44:25,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-04-07 00:44:25,590 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-07 00:44:25,591 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-07 00:44:25,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:44:25,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:44:25,735 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:44:25,737 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:44:25,772 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:25,796 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:25,796 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:25,804 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:25,812 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:25,812 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:25,817 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,025 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-07 00:44:26,026 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-07 00:44:26,028 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,091 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-04-07 00:44:26,092 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-04-07 00:44:26,102 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,114 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-07 00:44:26,114 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-07 00:44:26,175 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,181 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,181 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,181 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,186 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,186 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,187 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,193 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,193 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,224 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,250 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-04-07 00:44:26,251 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-04-07 00:44:26,272 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,276 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,277 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,277 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,282 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,282 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,282 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-07 00:44:26,286 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-07 00:44:26,286 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-07 00:44:26,296 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:44:26,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:44:26,305 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:44:26,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:44:26 BoogieIcfgContainer [2022-04-07 00:44:26,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:44:26,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:44:26,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:44:26,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:44:26,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:44:25" (1/3) ... [2022-04-07 00:44:26,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c75064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:44:26, skipping insertion in model container [2022-04-07 00:44:26,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:44:25" (2/3) ... [2022-04-07 00:44:26,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c75064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:44:26, skipping insertion in model container [2022-04-07 00:44:26,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:44:26" (3/3) ... [2022-04-07 00:44:26,314 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-04-07 00:44:26,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:44:26,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:44:26,352 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:44:26,357 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-07 00:44:26,357 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:44:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-07 00:44:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-07 00:44:26,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:26,402 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:26,402 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-04-07 00:44:26,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:26,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095266267] [2022-04-07 00:44:26,431 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 2 times [2022-04-07 00:44:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720288020] [2022-04-07 00:44:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720288020] [2022-04-07 00:44:26,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720288020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:26,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:26,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:44:26,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:26,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095266267] [2022-04-07 00:44:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095266267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:26,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:44:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164076107] [2022-04-07 00:44:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:26,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:44:26,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:44:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:44:26,860 INFO L87 Difference]: Start difference. First operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:44:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:27,793 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-04-07 00:44:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:44:27,795 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-07 00:44:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:27,805 INFO L225 Difference]: With dead ends: 538 [2022-04-07 00:44:27,805 INFO L226 Difference]: Without dead ends: 322 [2022-04-07 00:44:27,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:44:27,813 INFO L913 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:27,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-07 00:44:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-04-07 00:44:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 233 states have internal predecessors, (292), 56 states have call successors, (56), 24 states have call predecessors, (56), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-07 00:44:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-04-07 00:44:27,887 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-04-07 00:44:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:27,888 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-04-07 00:44:27,888 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:44:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-04-07 00:44:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:44:27,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:27,889 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:27,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:44:27,890 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-04-07 00:44:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491262831] [2022-04-07 00:44:27,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 2 times [2022-04-07 00:44:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063489549] [2022-04-07 00:44:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:28,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:28,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063489549] [2022-04-07 00:44:28,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063489549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:28,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:28,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:28,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:28,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491262831] [2022-04-07 00:44:28,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491262831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:28,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:28,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:28,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902934499] [2022-04-07 00:44:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:28,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:44:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:44:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:44:28,069 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:29,554 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-04-07 00:44:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:44:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-04-07 00:44:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:29,563 INFO L225 Difference]: With dead ends: 637 [2022-04-07 00:44:29,563 INFO L226 Difference]: Without dead ends: 476 [2022-04-07 00:44:29,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:29,566 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:29,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-07 00:44:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-04-07 00:44:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-04-07 00:44:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 334 states have internal predecessors, (431), 65 states have call successors, (65), 37 states have call predecessors, (65), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-04-07 00:44:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-04-07 00:44:29,640 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-04-07 00:44:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:29,641 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-04-07 00:44:29,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-04-07 00:44:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-07 00:44:29,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:29,643 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:29,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-07 00:44:29,643 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-04-07 00:44:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436170959] [2022-04-07 00:44:29,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 2 times [2022-04-07 00:44:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272089383] [2022-04-07 00:44:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:29,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:29,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272089383] [2022-04-07 00:44:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272089383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:29,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:29,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436170959] [2022-04-07 00:44:29,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436170959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:29,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:29,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782876215] [2022-04-07 00:44:29,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:29,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:44:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:44:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:44:29,858 INFO L87 Difference]: Start difference. First operand 429 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:30,548 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-04-07 00:44:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:44:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-04-07 00:44:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:30,553 INFO L225 Difference]: With dead ends: 943 [2022-04-07 00:44:30,553 INFO L226 Difference]: Without dead ends: 675 [2022-04-07 00:44:30,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:30,555 INFO L913 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:30,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:44:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-04-07 00:44:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-04-07 00:44:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.3144016227180528) internal successors, (648), 497 states have internal predecessors, (648), 85 states have call successors, (85), 55 states have call predecessors, (85), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-04-07 00:44:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-04-07 00:44:30,638 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-04-07 00:44:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:30,639 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-04-07 00:44:30,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-04-07 00:44:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-07 00:44:30,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:30,641 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:30,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-07 00:44:30,641 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-04-07 00:44:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791741963] [2022-04-07 00:44:30,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 2 times [2022-04-07 00:44:30,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:30,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133659676] [2022-04-07 00:44:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:30,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:30,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:30,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:30,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133659676] [2022-04-07 00:44:30,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133659676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:30,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:30,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791741963] [2022-04-07 00:44:30,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791741963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:30,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:30,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817687088] [2022-04-07 00:44:30,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:30,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:44:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:44:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:44:30,789 INFO L87 Difference]: Start difference. First operand 632 states and 845 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:31,800 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-04-07 00:44:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:44:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-04-07 00:44:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:31,804 INFO L225 Difference]: With dead ends: 739 [2022-04-07 00:44:31,804 INFO L226 Difference]: Without dead ends: 721 [2022-04-07 00:44:31,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:31,805 INFO L913 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:31,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-04-07 00:44:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-04-07 00:44:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 525 states have (on average 1.3161904761904761) internal successors, (691), 535 states have internal predecessors, (691), 86 states have call successors, (86), 57 states have call predecessors, (86), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-04-07 00:44:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-04-07 00:44:31,886 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-04-07 00:44:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:31,891 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-04-07 00:44:31,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-04-07 00:44:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-07 00:44:31,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:31,893 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:31,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-07 00:44:31,893 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-04-07 00:44:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120311076] [2022-04-07 00:44:31,895 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 2 times [2022-04-07 00:44:31,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:31,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322854923] [2022-04-07 00:44:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:32,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:44:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322854923] [2022-04-07 00:44:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322854923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:32,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:32,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:44:32,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:32,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120311076] [2022-04-07 00:44:32,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120311076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:32,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:32,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:44:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046277613] [2022-04-07 00:44:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:32,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:44:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:44:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:44:32,102 INFO L87 Difference]: Start difference. First operand 670 states and 894 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:44:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:33,099 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-04-07 00:44:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:44:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-04-07 00:44:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:33,103 INFO L225 Difference]: With dead ends: 763 [2022-04-07 00:44:33,103 INFO L226 Difference]: Without dead ends: 696 [2022-04-07 00:44:33,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:33,105 INFO L913 BasicCegarLoop]: 321 mSDtfsCounter, 520 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:33,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 722 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-04-07 00:44:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-04-07 00:44:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 538 states have internal predecessors, (694), 86 states have call successors, (86), 57 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-04-07 00:44:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-04-07 00:44:33,169 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-04-07 00:44:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:33,169 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-04-07 00:44:33,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:44:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-04-07 00:44:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-07 00:44:33,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:33,171 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:33,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-07 00:44:33,171 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-04-07 00:44:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787884890] [2022-04-07 00:44:33,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 2 times [2022-04-07 00:44:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108731214] [2022-04-07 00:44:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108731214] [2022-04-07 00:44:33,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108731214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:33,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:33,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:33,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787884890] [2022-04-07 00:44:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787884890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:33,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:44:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332879785] [2022-04-07 00:44:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:33,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:44:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:44:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:44:33,304 INFO L87 Difference]: Start difference. First operand 674 states and 898 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:33,935 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-04-07 00:44:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:44:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 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 40 [2022-04-07 00:44:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:33,942 INFO L225 Difference]: With dead ends: 701 [2022-04-07 00:44:33,942 INFO L226 Difference]: Without dead ends: 698 [2022-04-07 00:44:33,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:44:33,945 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:33,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:44:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-04-07 00:44:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-04-07 00:44:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 539 states have (on average 1.313543599257885) internal successors, (708), 548 states have internal predecessors, (708), 86 states have call successors, (86), 58 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-04-07 00:44:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-04-07 00:44:34,033 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-04-07 00:44:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:34,034 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-04-07 00:44:34,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-07 00:44:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-04-07 00:44:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-07 00:44:34,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:34,036 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:34,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-07 00:44:34,036 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-04-07 00:44:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588085703] [2022-04-07 00:44:34,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 2 times [2022-04-07 00:44:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:34,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501758457] [2022-04-07 00:44:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:44:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501758457] [2022-04-07 00:44:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501758457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:34,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588085703] [2022-04-07 00:44:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588085703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166600557] [2022-04-07 00:44:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:34,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:44:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:44:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:34,203 INFO L87 Difference]: Start difference. First operand 685 states and 912 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:34,949 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-04-07 00:44:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:44:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 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 41 [2022-04-07 00:44:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:34,954 INFO L225 Difference]: With dead ends: 752 [2022-04-07 00:44:34,954 INFO L226 Difference]: Without dead ends: 747 [2022-04-07 00:44:34,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:44:34,955 INFO L913 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:34,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:44:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-04-07 00:44:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-04-07 00:44:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3091872791519434) internal successors, (741), 578 states have internal predecessors, (741), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-04-07 00:44:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-04-07 00:44:35,054 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-04-07 00:44:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:35,055 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-04-07 00:44:35,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-04-07 00:44:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-07 00:44:35,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:35,056 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:35,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-07 00:44:35,057 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-04-07 00:44:35,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:35,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [51278139] [2022-04-07 00:44:35,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 2 times [2022-04-07 00:44:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:35,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264252299] [2022-04-07 00:44:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:35,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:44:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264252299] [2022-04-07 00:44:35,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264252299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:35,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:35,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:35,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [51278139] [2022-04-07 00:44:35,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [51278139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:35,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:35,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943920871] [2022-04-07 00:44:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:35,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:35,296 INFO L87 Difference]: Start difference. First operand 718 states and 951 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:36,382 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-04-07 00:44:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:44:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-04-07 00:44:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:36,388 INFO L225 Difference]: With dead ends: 753 [2022-04-07 00:44:36,388 INFO L226 Difference]: Without dead ends: 747 [2022-04-07 00:44:36,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:44:36,389 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:36,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:44:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-04-07 00:44:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-04-07 00:44:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 578 states have internal predecessors, (740), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-04-07 00:44:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-04-07 00:44:36,479 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-04-07 00:44:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:36,479 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-04-07 00:44:36,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-04-07 00:44:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-07 00:44:36,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:36,480 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:36,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-07 00:44:36,481 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-04-07 00:44:36,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:36,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611144845] [2022-04-07 00:44:36,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 2 times [2022-04-07 00:44:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906797271] [2022-04-07 00:44:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:36,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:44:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:36,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906797271] [2022-04-07 00:44:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906797271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:36,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:36,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:36,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611144845] [2022-04-07 00:44:36,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611144845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:36,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:36,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:36,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12942625] [2022-04-07 00:44:36,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:36,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:36,732 INFO L87 Difference]: Start difference. First operand 718 states and 950 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:38,107 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-04-07 00:44:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:44:38,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-04-07 00:44:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:38,115 INFO L225 Difference]: With dead ends: 753 [2022-04-07 00:44:38,116 INFO L226 Difference]: Without dead ends: 747 [2022-04-07 00:44:38,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:44:38,118 INFO L913 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:38,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:44:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-04-07 00:44:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-04-07 00:44:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3056537102473498) internal successors, (739), 578 states have internal predecessors, (739), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-04-07 00:44:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-04-07 00:44:38,213 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-04-07 00:44:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:38,213 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-04-07 00:44:38,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-04-07 00:44:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-07 00:44:38,214 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:38,214 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:38,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-07 00:44:38,215 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-04-07 00:44:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491321801] [2022-04-07 00:44:38,218 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 2 times [2022-04-07 00:44:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:38,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615564825] [2022-04-07 00:44:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:38,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:38,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:44:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615564825] [2022-04-07 00:44:38,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615564825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:38,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:38,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:44:38,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491321801] [2022-04-07 00:44:38,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491321801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:38,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:38,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:44:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203353586] [2022-04-07 00:44:38,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:38,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:44:38,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:44:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:44:38,387 INFO L87 Difference]: Start difference. First operand 718 states and 949 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:44:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:39,385 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-04-07 00:44:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:44:39,386 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), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-04-07 00:44:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:39,391 INFO L225 Difference]: With dead ends: 1093 [2022-04-07 00:44:39,392 INFO L226 Difference]: Without dead ends: 1090 [2022-04-07 00:44:39,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:39,393 INFO L913 BasicCegarLoop]: 434 mSDtfsCounter, 653 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:39,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 634 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-04-07 00:44:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-04-07 00:44:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 657 states have (on average 1.3135464231354643) internal successors, (863), 671 states have internal predecessors, (863), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-04-07 00:44:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-04-07 00:44:39,510 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-04-07 00:44:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:39,510 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-04-07 00:44:39,510 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), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:44:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-04-07 00:44:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-07 00:44:39,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:39,513 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:39,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-07 00:44:39,514 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-04-07 00:44:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219827122] [2022-04-07 00:44:39,514 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 2 times [2022-04-07 00:44:39,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:39,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893069377] [2022-04-07 00:44:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:44:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893069377] [2022-04-07 00:44:39,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893069377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:39,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:39,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:39,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219827122] [2022-04-07 00:44:39,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219827122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:39,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:39,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189294146] [2022-04-07 00:44:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:39,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:44:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:44:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:39,683 INFO L87 Difference]: Start difference. First operand 831 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:40,672 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-04-07 00:44:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:44:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 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 44 [2022-04-07 00:44:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:40,678 INFO L225 Difference]: With dead ends: 874 [2022-04-07 00:44:40,678 INFO L226 Difference]: Without dead ends: 856 [2022-04-07 00:44:40,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:40,679 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:40,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1079 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-04-07 00:44:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-04-07 00:44:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 656 states have (on average 1.3125) internal successors, (861), 670 states have internal predecessors, (861), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-04-07 00:44:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-04-07 00:44:40,788 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-04-07 00:44:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:40,788 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-04-07 00:44:40,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-04-07 00:44:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-07 00:44:40,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:40,790 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:40,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-07 00:44:40,790 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-04-07 00:44:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:40,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717477636] [2022-04-07 00:44:40,791 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 2 times [2022-04-07 00:44:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:40,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411649757] [2022-04-07 00:44:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:40,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:40,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:40,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:44:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411649757] [2022-04-07 00:44:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411649757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:41,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717477636] [2022-04-07 00:44:41,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717477636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58533738] [2022-04-07 00:44:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:41,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:44:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:44:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:41,015 INFO L87 Difference]: Start difference. First operand 829 states and 1099 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:44:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:42,622 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-04-07 00:44:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:44:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-04-07 00:44:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:42,627 INFO L225 Difference]: With dead ends: 1427 [2022-04-07 00:44:42,627 INFO L226 Difference]: Without dead ends: 874 [2022-04-07 00:44:42,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:44:42,629 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:42,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-07 00:44:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-04-07 00:44:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-04-07 00:44:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 647 states have (on average 1.2982998454404946) internal successors, (840), 661 states have internal predecessors, (840), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-04-07 00:44:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-04-07 00:44:42,776 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-04-07 00:44:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:42,777 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-04-07 00:44:42,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:44:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-04-07 00:44:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-07 00:44:42,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:42,779 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:42,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-07 00:44:42,779 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-04-07 00:44:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:42,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46062708] [2022-04-07 00:44:42,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 2 times [2022-04-07 00:44:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:42,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596264310] [2022-04-07 00:44:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:44:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:42,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:42,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596264310] [2022-04-07 00:44:42,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596264310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:42,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:42,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:42,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:42,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46062708] [2022-04-07 00:44:42,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46062708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:42,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:42,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149429335] [2022-04-07 00:44:42,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:42,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:44:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:44:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:42,919 INFO L87 Difference]: Start difference. First operand 820 states and 1078 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:44:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:43,695 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-04-07 00:44:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:44:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-04-07 00:44:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:43,700 INFO L225 Difference]: With dead ends: 919 [2022-04-07 00:44:43,700 INFO L226 Difference]: Without dead ends: 580 [2022-04-07 00:44:43,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:44:43,705 INFO L913 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:43,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:44:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-07 00:44:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-04-07 00:44:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.2740384615384615) internal successors, (530), 427 states have internal predecessors, (530), 62 states have call successors, (62), 43 states have call predecessors, (62), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-04-07 00:44:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-04-07 00:44:43,812 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-04-07 00:44:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:43,812 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-04-07 00:44:43,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:44:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-04-07 00:44:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-07 00:44:43,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:43,814 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:43,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-07 00:44:43,814 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-04-07 00:44:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:43,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820520898] [2022-04-07 00:44:43,815 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 2 times [2022-04-07 00:44:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:43,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748130387] [2022-04-07 00:44:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-07 00:44:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:44:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-07 00:44:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:43,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748130387] [2022-04-07 00:44:43,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748130387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:43,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:43,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:43,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820520898] [2022-04-07 00:44:43,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820520898] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:43,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:43,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:43,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698808067] [2022-04-07 00:44:43,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:43,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:44:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:44:43,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:43,961 INFO L87 Difference]: Start difference. First operand 528 states and 667 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:44:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:44,930 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-04-07 00:44:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:44:44,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-04-07 00:44:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:44,933 INFO L225 Difference]: With dead ends: 834 [2022-04-07 00:44:44,933 INFO L226 Difference]: Without dead ends: 569 [2022-04-07 00:44:44,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:44,938 INFO L913 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:44,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-07 00:44:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-04-07 00:44:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.275058275058275) internal successors, (547), 440 states have internal predecessors, (547), 62 states have call successors, (62), 43 states have call predecessors, (62), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-04-07 00:44:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-04-07 00:44:45,074 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-04-07 00:44:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:45,074 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-04-07 00:44:45,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:44:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-04-07 00:44:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:44:45,076 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:45,076 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:45,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-07 00:44:45,076 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-04-07 00:44:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548653927] [2022-04-07 00:44:45,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 2 times [2022-04-07 00:44:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63186717] [2022-04-07 00:44:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:45,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63186717] [2022-04-07 00:44:45,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63186717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:45,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:45,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:45,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548653927] [2022-04-07 00:44:45,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548653927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:45,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:45,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149783993] [2022-04-07 00:44:45,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:45,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:45,259 INFO L87 Difference]: Start difference. First operand 542 states and 687 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:44:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:46,616 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-04-07 00:44:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:44:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 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 52 [2022-04-07 00:44:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:46,621 INFO L225 Difference]: With dead ends: 780 [2022-04-07 00:44:46,621 INFO L226 Difference]: Without dead ends: 714 [2022-04-07 00:44:46,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-04-07 00:44:46,622 INFO L913 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:46,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:44:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-04-07 00:44:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-04-07 00:44:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 452 states have (on average 1.2676991150442478) internal successors, (573), 464 states have internal predecessors, (573), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-04-07 00:44:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-04-07 00:44:46,730 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-04-07 00:44:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:46,730 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-04-07 00:44:46,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:44:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-04-07 00:44:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:44:46,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:46,731 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:46,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-07 00:44:46,732 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-04-07 00:44:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534565938] [2022-04-07 00:44:46,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 2 times [2022-04-07 00:44:46,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:46,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316902331] [2022-04-07 00:44:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:46,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:46,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316902331] [2022-04-07 00:44:46,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316902331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:46,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:46,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:46,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:46,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534565938] [2022-04-07 00:44:46,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534565938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:46,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:46,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787775509] [2022-04-07 00:44:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:46,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:44:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:44:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:46,911 INFO L87 Difference]: Start difference. First operand 571 states and 720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:48,046 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-04-07 00:44:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:44:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 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 54 [2022-04-07 00:44:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:48,050 INFO L225 Difference]: With dead ends: 1006 [2022-04-07 00:44:48,050 INFO L226 Difference]: Without dead ends: 638 [2022-04-07 00:44:48,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:44:48,052 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 502 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:48,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 750 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:44:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-04-07 00:44:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-04-07 00:44:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 464 states have (on average 1.271551724137931) internal successors, (590), 476 states have internal predecessors, (590), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-04-07 00:44:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-04-07 00:44:48,177 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-04-07 00:44:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:48,177 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-04-07 00:44:48,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-04-07 00:44:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:44:48,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:48,180 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:48,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-07 00:44:48,180 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-04-07 00:44:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1397244131] [2022-04-07 00:44:48,181 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 2 times [2022-04-07 00:44:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:48,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149222899] [2022-04-07 00:44:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:48,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:48,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149222899] [2022-04-07 00:44:48,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149222899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:48,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:48,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:48,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1397244131] [2022-04-07 00:44:48,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1397244131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:48,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:48,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:48,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028399103] [2022-04-07 00:44:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:48,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:44:48,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:44:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:44:48,388 INFO L87 Difference]: Start difference. First operand 583 states and 737 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:44:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:49,822 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-04-07 00:44:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:44:49,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 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 54 [2022-04-07 00:44:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:49,826 INFO L225 Difference]: With dead ends: 692 [2022-04-07 00:44:49,826 INFO L226 Difference]: Without dead ends: 611 [2022-04-07 00:44:49,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:44:49,827 INFO L913 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:49,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:44:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-04-07 00:44:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-04-07 00:44:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 447 states have (on average 1.2662192393736018) internal successors, (566), 459 states have internal predecessors, (566), 64 states have call successors, (64), 44 states have call predecessors, (64), 52 states have return successors, (81), 61 states have call predecessors, (81), 56 states have call successors, (81) [2022-04-07 00:44:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-04-07 00:44:49,938 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-04-07 00:44:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:49,938 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-04-07 00:44:49,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:44:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-04-07 00:44:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:44:49,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:49,940 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:49,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-07 00:44:49,940 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-04-07 00:44:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876131278] [2022-04-07 00:44:49,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 2 times [2022-04-07 00:44:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382529964] [2022-04-07 00:44:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:50,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:50,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382529964] [2022-04-07 00:44:50,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382529964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:50,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:50,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:50,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876131278] [2022-04-07 00:44:50,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876131278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:50,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:50,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:44:50,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774788202] [2022-04-07 00:44:50,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:50,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:44:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:44:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:44:50,089 INFO L87 Difference]: Start difference. First operand 564 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:51,037 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-04-07 00:44:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:44:51,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 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 54 [2022-04-07 00:44:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:51,040 INFO L225 Difference]: With dead ends: 679 [2022-04-07 00:44:51,040 INFO L226 Difference]: Without dead ends: 666 [2022-04-07 00:44:51,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:44:51,041 INFO L913 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:51,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-04-07 00:44:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-04-07 00:44:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 461 states have (on average 1.2668112798264641) internal successors, (584), 473 states have internal predecessors, (584), 64 states have call successors, (64), 45 states have call predecessors, (64), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-04-07 00:44:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-04-07 00:44:51,181 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-04-07 00:44:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:51,182 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-04-07 00:44:51,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-04-07 00:44:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:44:51,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:51,184 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:51,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-07 00:44:51,184 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-04-07 00:44:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463096575] [2022-04-07 00:44:51,185 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 2 times [2022-04-07 00:44:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57126549] [2022-04-07 00:44:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:44:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:44:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:44:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:51,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57126549] [2022-04-07 00:44:51,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57126549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:51,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:51,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:51,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463096575] [2022-04-07 00:44:51,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463096575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:51,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:51,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974881435] [2022-04-07 00:44:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:51,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:44:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:44:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:51,394 INFO L87 Difference]: Start difference. First operand 580 states and 733 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:44:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:52,245 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-04-07 00:44:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:44:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-04-07 00:44:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:52,248 INFO L225 Difference]: With dead ends: 877 [2022-04-07 00:44:52,248 INFO L226 Difference]: Without dead ends: 544 [2022-04-07 00:44:52,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:52,250 INFO L913 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:52,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:44:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-04-07 00:44:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-04-07 00:44:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 398 states have (on average 1.2487437185929648) internal successors, (497), 406 states have internal predecessors, (497), 60 states have call successors, (60), 43 states have call predecessors, (60), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-04-07 00:44:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-04-07 00:44:52,384 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-04-07 00:44:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:52,384 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-04-07 00:44:52,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:44:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-04-07 00:44:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:44:52,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:52,386 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:52,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-07 00:44:52,386 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-04-07 00:44:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:52,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1609692920] [2022-04-07 00:44:52,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 2 times [2022-04-07 00:44:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772287343] [2022-04-07 00:44:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:52,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772287343] [2022-04-07 00:44:52,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772287343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:52,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:52,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:52,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:52,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1609692920] [2022-04-07 00:44:52,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1609692920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:52,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:52,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225249966] [2022-04-07 00:44:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:52,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:44:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:44:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:44:52,583 INFO L87 Difference]: Start difference. First operand 506 states and 627 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:53,540 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-04-07 00:44:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:44:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 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 55 [2022-04-07 00:44:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:53,543 INFO L225 Difference]: With dead ends: 571 [2022-04-07 00:44:53,543 INFO L226 Difference]: Without dead ends: 567 [2022-04-07 00:44:53,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:44:53,543 INFO L913 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:53,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1534 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-04-07 00:44:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-04-07 00:44:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 413 states have (on average 1.2397094430992737) internal successors, (512), 421 states have internal predecessors, (512), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-04-07 00:44:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-04-07 00:44:53,669 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-04-07 00:44:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:53,669 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-04-07 00:44:53,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-04-07 00:44:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:44:53,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:53,670 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:53,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-07 00:44:53,671 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-04-07 00:44:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431350352] [2022-04-07 00:44:53,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 2 times [2022-04-07 00:44:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450118407] [2022-04-07 00:44:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:53,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450118407] [2022-04-07 00:44:53,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450118407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:53,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:53,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:53,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:53,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431350352] [2022-04-07 00:44:53,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431350352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:53,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:53,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:44:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782307408] [2022-04-07 00:44:53,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:53,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:44:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:44:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:44:53,849 INFO L87 Difference]: Start difference. First operand 523 states and 649 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:55,124 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-04-07 00:44:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:44:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 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 55 [2022-04-07 00:44:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:55,128 INFO L225 Difference]: With dead ends: 566 [2022-04-07 00:44:55,128 INFO L226 Difference]: Without dead ends: 551 [2022-04-07 00:44:55,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:44:55,129 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:55,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:44:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-04-07 00:44:55,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-04-07 00:44:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 410 states have (on average 1.2414634146341463) internal successors, (509), 419 states have internal predecessors, (509), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-04-07 00:44:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-04-07 00:44:55,245 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-04-07 00:44:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:55,245 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-04-07 00:44:55,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:44:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-04-07 00:44:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-07 00:44:55,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:55,246 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:55,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-07 00:44:55,246 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-04-07 00:44:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:55,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1292895168] [2022-04-07 00:44:55,247 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 2 times [2022-04-07 00:44:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:55,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123127693] [2022-04-07 00:44:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:44:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-07 00:44:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123127693] [2022-04-07 00:44:55,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123127693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:55,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:55,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:55,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1292895168] [2022-04-07 00:44:55,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1292895168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:55,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:55,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:55,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523357963] [2022-04-07 00:44:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:55,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:55,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:55,423 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:44:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:56,363 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-04-07 00:44:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:44:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 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 57 [2022-04-07 00:44:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:56,367 INFO L225 Difference]: With dead ends: 566 [2022-04-07 00:44:56,367 INFO L226 Difference]: Without dead ends: 523 [2022-04-07 00:44:56,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:44:56,368 INFO L913 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:56,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 792 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-04-07 00:44:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-04-07 00:44:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 400 states have internal predecessors, (485), 58 states have call successors, (58), 41 states have call predecessors, (58), 45 states have return successors, (72), 55 states have call predecessors, (72), 52 states have call successors, (72) [2022-04-07 00:44:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-04-07 00:44:56,463 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-04-07 00:44:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:56,463 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-04-07 00:44:56,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:44:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-04-07 00:44:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-07 00:44:56,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:56,465 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:56,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-07 00:44:56,465 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-04-07 00:44:56,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848474087] [2022-04-07 00:44:56,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 2 times [2022-04-07 00:44:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108433419] [2022-04-07 00:44:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-07 00:44:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:56,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108433419] [2022-04-07 00:44:56,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108433419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:56,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:56,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:56,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848474087] [2022-04-07 00:44:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848474087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:56,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:56,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:44:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836928218] [2022-04-07 00:44:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:56,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:44:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:44:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:44:56,672 INFO L87 Difference]: Start difference. First operand 496 states and 615 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:57,791 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-04-07 00:44:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:44:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 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 56 [2022-04-07 00:44:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:57,793 INFO L225 Difference]: With dead ends: 531 [2022-04-07 00:44:57,793 INFO L226 Difference]: Without dead ends: 513 [2022-04-07 00:44:57,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:44:57,794 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:57,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:44:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-04-07 00:44:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-04-07 00:44:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2413793103448276) internal successors, (468), 384 states have internal predecessors, (468), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-04-07 00:44:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-04-07 00:44:57,902 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-04-07 00:44:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:57,903 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-04-07 00:44:57,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:44:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-04-07 00:44:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-07 00:44:57,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:57,913 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:57,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-07 00:44:57,913 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-04-07 00:44:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:57,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305006178] [2022-04-07 00:44:57,914 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 2 times [2022-04-07 00:44:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:57,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600999373] [2022-04-07 00:44:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:44:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:44:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:44:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:44:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600999373] [2022-04-07 00:44:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600999373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:58,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:58,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305006178] [2022-04-07 00:44:58,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305006178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:58,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:58,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:44:58,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340265786] [2022-04-07 00:44:58,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:58,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:44:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:44:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:44:58,107 INFO L87 Difference]: Start difference. First operand 478 states and 590 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:44:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:44:59,024 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-04-07 00:44:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:44:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-04-07 00:44:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:44:59,026 INFO L225 Difference]: With dead ends: 770 [2022-04-07 00:44:59,026 INFO L226 Difference]: Without dead ends: 511 [2022-04-07 00:44:59,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:44:59,027 INFO L913 BasicCegarLoop]: 309 mSDtfsCounter, 586 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:44:59,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 831 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:44:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-04-07 00:44:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-04-07 00:44:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2360742705570291) internal successors, (466), 384 states have internal predecessors, (466), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-04-07 00:44:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-04-07 00:44:59,106 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-04-07 00:44:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:44:59,106 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-04-07 00:44:59,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:44:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-04-07 00:44:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:44:59,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:44:59,107 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:44:59,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-07 00:44:59,107 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:44:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:44:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-04-07 00:44:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:59,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371246979] [2022-04-07 00:44:59,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:44:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 2 times [2022-04-07 00:44:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:44:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227974973] [2022-04-07 00:44:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:44:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:44:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:44:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:44:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:44:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:44:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:44:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:44:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:44:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227974973] [2022-04-07 00:44:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227974973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:59,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:59,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:44:59,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:44:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371246979] [2022-04-07 00:44:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371246979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:44:59,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:44:59,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:44:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404105501] [2022-04-07 00:44:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:44:59,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:44:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:44:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:44:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:44:59,315 INFO L87 Difference]: Start difference. First operand 478 states and 588 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:00,327 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-04-07 00:45:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 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 60 [2022-04-07 00:45:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:00,329 INFO L225 Difference]: With dead ends: 522 [2022-04-07 00:45:00,330 INFO L226 Difference]: Without dead ends: 501 [2022-04-07 00:45:00,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:00,330 INFO L913 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:00,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:45:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-07 00:45:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-04-07 00:45:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 381 states have internal predecessors, (462), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-04-07 00:45:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-04-07 00:45:00,425 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-04-07 00:45:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:00,426 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-04-07 00:45:00,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-04-07 00:45:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-07 00:45:00,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:00,427 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:00,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-07 00:45:00,427 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-04-07 00:45:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455390278] [2022-04-07 00:45:00,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 2 times [2022-04-07 00:45:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619829783] [2022-04-07 00:45:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:45:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619829783] [2022-04-07 00:45:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619829783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:00,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:00,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:45:00,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455390278] [2022-04-07 00:45:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455390278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:00,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:00,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:45:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347059880] [2022-04-07 00:45:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:00,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:45:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:45:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:45:00,633 INFO L87 Difference]: Start difference. First operand 474 states and 582 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:45:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:01,471 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-04-07 00:45:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:45:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-04-07 00:45:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:01,474 INFO L225 Difference]: With dead ends: 752 [2022-04-07 00:45:01,474 INFO L226 Difference]: Without dead ends: 526 [2022-04-07 00:45:01,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:01,475 INFO L913 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:01,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1295 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-04-07 00:45:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-04-07 00:45:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2299465240641712) internal successors, (460), 381 states have internal predecessors, (460), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-04-07 00:45:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-04-07 00:45:01,566 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-04-07 00:45:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:01,566 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-04-07 00:45:01,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-07 00:45:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-04-07 00:45:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:45:01,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:01,567 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:01,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-07 00:45:01,567 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-04-07 00:45:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430478188] [2022-04-07 00:45:01,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 2 times [2022-04-07 00:45:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:01,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082423554] [2022-04-07 00:45:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:01,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:01,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082423554] [2022-04-07 00:45:01,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082423554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:01,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:01,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:01,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430478188] [2022-04-07 00:45:01,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430478188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:01,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:01,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:01,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378274863] [2022-04-07 00:45:01,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:01,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:01,752 INFO L87 Difference]: Start difference. First operand 474 states and 580 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:02,666 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-04-07 00:45:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 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 61 [2022-04-07 00:45:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:02,668 INFO L225 Difference]: With dead ends: 518 [2022-04-07 00:45:02,669 INFO L226 Difference]: Without dead ends: 496 [2022-04-07 00:45:02,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:02,669 INFO L913 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:02,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:45:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-07 00:45:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-04-07 00:45:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 370 states have (on average 1.2297297297297298) internal successors, (455), 377 states have internal predecessors, (455), 55 states have call successors, (55), 41 states have call predecessors, (55), 43 states have return successors, (63), 51 states have call predecessors, (63), 49 states have call successors, (63) [2022-04-07 00:45:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-04-07 00:45:02,763 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-04-07 00:45:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:02,763 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-04-07 00:45:02,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-04-07 00:45:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:45:02,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:02,764 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:02,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-07 00:45:02,765 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-04-07 00:45:02,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:02,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2020134548] [2022-04-07 00:45:02,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 2 times [2022-04-07 00:45:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:02,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889206364] [2022-04-07 00:45:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:02,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889206364] [2022-04-07 00:45:02,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889206364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:02,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:02,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:02,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:02,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2020134548] [2022-04-07 00:45:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2020134548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:02,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:02,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654644468] [2022-04-07 00:45:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:02,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:02,959 INFO L87 Difference]: Start difference. First operand 469 states and 573 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:03,840 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-04-07 00:45:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 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 61 [2022-04-07 00:45:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:03,842 INFO L225 Difference]: With dead ends: 513 [2022-04-07 00:45:03,842 INFO L226 Difference]: Without dead ends: 492 [2022-04-07 00:45:03,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:03,843 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:03,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-07 00:45:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-04-07 00:45:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 367 states have (on average 1.228882833787466) internal successors, (451), 374 states have internal predecessors, (451), 54 states have call successors, (54), 41 states have call predecessors, (54), 43 states have return successors, (62), 50 states have call predecessors, (62), 48 states have call successors, (62) [2022-04-07 00:45:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-04-07 00:45:03,947 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-04-07 00:45:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:03,948 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-04-07 00:45:03,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-04-07 00:45:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-07 00:45:03,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:03,949 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:03,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-07 00:45:03,949 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-04-07 00:45:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:03,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137684776] [2022-04-07 00:45:03,950 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 2 times [2022-04-07 00:45:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:03,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882107154] [2022-04-07 00:45:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:45:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:04,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882107154] [2022-04-07 00:45:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882107154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:04,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:45:04,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137684776] [2022-04-07 00:45:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137684776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:04,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:04,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:45:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79269137] [2022-04-07 00:45:04,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:04,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:45:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:45:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:45:04,101 INFO L87 Difference]: Start difference. First operand 465 states and 567 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:45:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:04,950 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-04-07 00:45:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:45:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-07 00:45:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:04,953 INFO L225 Difference]: With dead ends: 889 [2022-04-07 00:45:04,953 INFO L226 Difference]: Without dead ends: 636 [2022-04-07 00:45:04,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:45:04,955 INFO L913 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:04,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-04-07 00:45:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-04-07 00:45:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 460 states have (on average 1.2195652173913043) internal successors, (561), 469 states have internal predecessors, (561), 67 states have call successors, (67), 51 states have call predecessors, (67), 58 states have return successors, (87), 66 states have call predecessors, (87), 62 states have call successors, (87) [2022-04-07 00:45:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-04-07 00:45:05,094 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-04-07 00:45:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:05,095 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-04-07 00:45:05,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:45:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-04-07 00:45:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-07 00:45:05,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:05,096 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:05,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-07 00:45:05,096 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-04-07 00:45:05,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:05,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [74207011] [2022-04-07 00:45:05,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 2 times [2022-04-07 00:45:05,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:05,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189945762] [2022-04-07 00:45:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-07 00:45:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:05,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189945762] [2022-04-07 00:45:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189945762] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:05,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:05,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:05,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [74207011] [2022-04-07 00:45:05,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [74207011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:05,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:05,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:05,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465842935] [2022-04-07 00:45:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:05,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:05,309 INFO L87 Difference]: Start difference. First operand 586 states and 715 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:06,213 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-04-07 00:45:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 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 65 [2022-04-07 00:45:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:06,218 INFO L225 Difference]: With dead ends: 630 [2022-04-07 00:45:06,218 INFO L226 Difference]: Without dead ends: 587 [2022-04-07 00:45:06,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:06,219 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:06,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-04-07 00:45:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-04-07 00:45:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 448 states have internal predecessors, (535), 64 states have call successors, (64), 49 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 59 states have call successors, (84) [2022-04-07 00:45:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-04-07 00:45:06,320 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-04-07 00:45:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:06,320 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-04-07 00:45:06,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-07 00:45:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-04-07 00:45:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-07 00:45:06,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:06,321 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:06,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-07 00:45:06,321 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-04-07 00:45:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:06,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911163209] [2022-04-07 00:45:06,322 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 2 times [2022-04-07 00:45:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:06,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962897649] [2022-04-07 00:45:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:06,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:45:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-07 00:45:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:06,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:06,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962897649] [2022-04-07 00:45:06,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962897649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:06,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:06,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:45:06,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:06,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911163209] [2022-04-07 00:45:06,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911163209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:06,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:06,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:45:06,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479724105] [2022-04-07 00:45:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:06,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:45:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:45:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:45:06,504 INFO L87 Difference]: Start difference. First operand 560 states and 683 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-07 00:45:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:07,447 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-04-07 00:45:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:45:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-04-07 00:45:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:07,450 INFO L225 Difference]: With dead ends: 892 [2022-04-07 00:45:07,450 INFO L226 Difference]: Without dead ends: 575 [2022-04-07 00:45:07,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:45:07,452 INFO L913 BasicCegarLoop]: 406 mSDtfsCounter, 511 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:07,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1041 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-04-07 00:45:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-04-07 00:45:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.2188235294117646) internal successors, (518), 433 states have internal predecessors, (518), 62 states have call successors, (62), 49 states have call predecessors, (62), 54 states have return successors, (73), 60 states have call predecessors, (73), 57 states have call successors, (73) [2022-04-07 00:45:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-04-07 00:45:07,544 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-04-07 00:45:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:07,544 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-04-07 00:45:07,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-07 00:45:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-04-07 00:45:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-07 00:45:07,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:07,545 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:07,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-07 00:45:07,546 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-04-07 00:45:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:07,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448579649] [2022-04-07 00:45:07,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 2 times [2022-04-07 00:45:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:07,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397419125] [2022-04-07 00:45:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:07,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:45:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-07 00:45:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:07,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397419125] [2022-04-07 00:45:07,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397419125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:07,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:07,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:07,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:07,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448579649] [2022-04-07 00:45:07,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448579649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:07,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:07,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682377417] [2022-04-07 00:45:07,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:07,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:07,761 INFO L87 Difference]: Start difference. First operand 542 states and 653 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:08,697 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-04-07 00:45:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:45:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-04-07 00:45:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:08,700 INFO L225 Difference]: With dead ends: 905 [2022-04-07 00:45:08,700 INFO L226 Difference]: Without dead ends: 651 [2022-04-07 00:45:08,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:45:08,701 INFO L913 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:08,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1579 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-04-07 00:45:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-04-07 00:45:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 407 states have internal predecessors, (489), 55 states have call successors, (55), 43 states have call predecessors, (55), 49 states have return successors, (63), 56 states have call predecessors, (63), 51 states have call successors, (63) [2022-04-07 00:45:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-04-07 00:45:08,794 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-04-07 00:45:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:08,794 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-04-07 00:45:08,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-04-07 00:45:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-07 00:45:08,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:08,795 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:08,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-07 00:45:08,795 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-04-07 00:45:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903898073] [2022-04-07 00:45:08,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 2 times [2022-04-07 00:45:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186048325] [2022-04-07 00:45:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:08,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:08,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:09,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:09,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:09,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:09,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-07 00:45:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:09,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186048325] [2022-04-07 00:45:09,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186048325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:09,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:09,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:09,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903898073] [2022-04-07 00:45:09,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903898073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:09,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:09,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665449874] [2022-04-07 00:45:09,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:09,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:45:09,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:45:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:09,041 INFO L87 Difference]: Start difference. First operand 506 states and 607 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:10,174 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-04-07 00:45:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:45:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 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 85 [2022-04-07 00:45:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:10,176 INFO L225 Difference]: With dead ends: 584 [2022-04-07 00:45:10,176 INFO L226 Difference]: Without dead ends: 563 [2022-04-07 00:45:10,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:45:10,177 INFO L913 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:10,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1759 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:45:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-04-07 00:45:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-04-07 00:45:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 414 states have internal predecessors, (496), 55 states have call successors, (55), 43 states have call predecessors, (55), 50 states have return successors, (66), 57 states have call predecessors, (66), 51 states have call successors, (66) [2022-04-07 00:45:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-04-07 00:45:10,289 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-04-07 00:45:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:10,289 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-04-07 00:45:10,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-04-07 00:45:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-07 00:45:10,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:10,290 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:10,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-07 00:45:10,291 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-04-07 00:45:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234567678] [2022-04-07 00:45:10,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 2 times [2022-04-07 00:45:10,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517133986] [2022-04-07 00:45:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:45:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-07 00:45:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:10,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517133986] [2022-04-07 00:45:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517133986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:10,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:45:10,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234567678] [2022-04-07 00:45:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234567678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:10,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:45:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030499274] [2022-04-07 00:45:10,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:10,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:45:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:45:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:45:10,478 INFO L87 Difference]: Start difference. First operand 514 states and 617 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:45:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:11,579 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-04-07 00:45:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:45:11,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 80 [2022-04-07 00:45:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:11,581 INFO L225 Difference]: With dead ends: 1003 [2022-04-07 00:45:11,582 INFO L226 Difference]: Without dead ends: 667 [2022-04-07 00:45:11,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:45:11,583 INFO L913 BasicCegarLoop]: 331 mSDtfsCounter, 797 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:11,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:45:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-04-07 00:45:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-04-07 00:45:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 505 states have (on average 1.205940594059406) internal successors, (609), 513 states have internal predecessors, (609), 63 states have call successors, (63), 55 states have call predecessors, (63), 66 states have return successors, (77), 67 states have call predecessors, (77), 59 states have call successors, (77) [2022-04-07 00:45:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-04-07 00:45:11,724 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-04-07 00:45:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:11,725 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-04-07 00:45:11,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:45:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-04-07 00:45:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-07 00:45:11,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:11,726 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:11,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-07 00:45:11,726 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-04-07 00:45:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914958022] [2022-04-07 00:45:11,727 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 2 times [2022-04-07 00:45:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66075913] [2022-04-07 00:45:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-07 00:45:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:11,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66075913] [2022-04-07 00:45:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66075913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:11,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:11,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:11,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914958022] [2022-04-07 00:45:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914958022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:11,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:11,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048386287] [2022-04-07 00:45:11,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:11,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:45:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:45:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:11,964 INFO L87 Difference]: Start difference. First operand 635 states and 749 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:12,948 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-04-07 00:45:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:45:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 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 86 [2022-04-07 00:45:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:12,951 INFO L225 Difference]: With dead ends: 685 [2022-04-07 00:45:12,951 INFO L226 Difference]: Without dead ends: 664 [2022-04-07 00:45:12,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:45:12,952 INFO L913 BasicCegarLoop]: 303 mSDtfsCounter, 429 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:12,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1671 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-04-07 00:45:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-04-07 00:45:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 498 states have (on average 1.2068273092369477) internal successors, (601), 506 states have internal predecessors, (601), 63 states have call successors, (63), 55 states have call predecessors, (63), 65 states have return successors, (75), 66 states have call predecessors, (75), 59 states have call successors, (75) [2022-04-07 00:45:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-04-07 00:45:13,066 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-04-07 00:45:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:13,066 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-04-07 00:45:13,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-07 00:45:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-04-07 00:45:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-07 00:45:13,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:13,068 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:13,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-07 00:45:13,068 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-04-07 00:45:13,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1799727911] [2022-04-07 00:45:13,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 2 times [2022-04-07 00:45:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214412299] [2022-04-07 00:45:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:45:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-07 00:45:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:13,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214412299] [2022-04-07 00:45:13,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214412299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:13,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:13,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:45:13,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1799727911] [2022-04-07 00:45:13,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1799727911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:13,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:13,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:45:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461221693] [2022-04-07 00:45:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:13,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:45:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:45:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:45:13,257 INFO L87 Difference]: Start difference. First operand 627 states and 739 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:45:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:14,085 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-04-07 00:45:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 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 81 [2022-04-07 00:45:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:14,087 INFO L225 Difference]: With dead ends: 645 [2022-04-07 00:45:14,087 INFO L226 Difference]: Without dead ends: 581 [2022-04-07 00:45:14,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:14,088 INFO L913 BasicCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:14,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-04-07 00:45:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-04-07 00:45:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 456 states have (on average 1.206140350877193) internal successors, (550), 464 states have internal predecessors, (550), 61 states have call successors, (61), 53 states have call predecessors, (61), 61 states have return successors, (71), 62 states have call predecessors, (71), 57 states have call successors, (71) [2022-04-07 00:45:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-04-07 00:45:14,202 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-04-07 00:45:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:14,203 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-04-07 00:45:14,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-07 00:45:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-04-07 00:45:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-07 00:45:14,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:14,204 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:14,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-07 00:45:14,204 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-04-07 00:45:14,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461251648] [2022-04-07 00:45:14,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 2 times [2022-04-07 00:45:14,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895324776] [2022-04-07 00:45:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:14,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-07 00:45:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-07 00:45:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-07 00:45:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:14,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895324776] [2022-04-07 00:45:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895324776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:14,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:14,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:14,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461251648] [2022-04-07 00:45:14,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461251648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:14,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:14,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:45:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376090478] [2022-04-07 00:45:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:14,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:45:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:45:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:14,452 INFO L87 Difference]: Start difference. First operand 579 states and 682 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-07 00:45:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:15,524 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-04-07 00:45:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:45:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 90 [2022-04-07 00:45:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:15,526 INFO L225 Difference]: With dead ends: 583 [2022-04-07 00:45:15,526 INFO L226 Difference]: Without dead ends: 495 [2022-04-07 00:45:15,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:45:15,527 INFO L913 BasicCegarLoop]: 242 mSDtfsCounter, 628 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:15,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 611 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-07 00:45:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-04-07 00:45:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-04-07 00:45:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 384 states have (on average 1.2083333333333333) internal successors, (464), 391 states have internal predecessors, (464), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-04-07 00:45:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-04-07 00:45:15,628 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-04-07 00:45:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:15,628 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-04-07 00:45:15,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-07 00:45:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-04-07 00:45:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-07 00:45:15,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:15,629 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:15,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-07 00:45:15,630 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-04-07 00:45:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:15,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614960872] [2022-04-07 00:45:15,630 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 2 times [2022-04-07 00:45:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:15,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787495221] [2022-04-07 00:45:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-07 00:45:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-07 00:45:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:15,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787495221] [2022-04-07 00:45:15,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787495221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:15,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:15,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:15,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614960872] [2022-04-07 00:45:15,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614960872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:15,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:15,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324687026] [2022-04-07 00:45:15,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:15,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:15,878 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:45:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:16,311 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-04-07 00:45:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:45:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-04-07 00:45:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:16,313 INFO L225 Difference]: With dead ends: 528 [2022-04-07 00:45:16,313 INFO L226 Difference]: Without dead ends: 489 [2022-04-07 00:45:16,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:45:16,314 INFO L913 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:16,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 858 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:45:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-04-07 00:45:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-04-07 00:45:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 346 states have internal predecessors, (407), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-04-07 00:45:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-04-07 00:45:16,430 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-04-07 00:45:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:16,430 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-04-07 00:45:16,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-07 00:45:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-04-07 00:45:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-07 00:45:16,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:16,431 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:16,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-07 00:45:16,431 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-04-07 00:45:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851042310] [2022-04-07 00:45:16,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 2 times [2022-04-07 00:45:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191908387] [2022-04-07 00:45:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:16,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-07 00:45:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-07 00:45:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:16,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:16,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191908387] [2022-04-07 00:45:16,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191908387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:16,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:16,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:16,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:16,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851042310] [2022-04-07 00:45:16,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851042310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:16,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:16,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:16,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644875109] [2022-04-07 00:45:16,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:16,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:45:16,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:45:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:45:16,682 INFO L87 Difference]: Start difference. First operand 436 states and 509 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-07 00:45:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:17,715 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-04-07 00:45:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-07 00:45:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2022-04-07 00:45:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:17,718 INFO L225 Difference]: With dead ends: 836 [2022-04-07 00:45:17,718 INFO L226 Difference]: Without dead ends: 791 [2022-04-07 00:45:17,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-04-07 00:45:17,720 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:17,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1602 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-07 00:45:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-04-07 00:45:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 329 states have internal predecessors, (388), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-04-07 00:45:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-04-07 00:45:17,826 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-04-07 00:45:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:17,826 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-04-07 00:45:17,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-07 00:45:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-04-07 00:45:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-07 00:45:17,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:17,828 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:17,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-07 00:45:17,828 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-04-07 00:45:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:17,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779152810] [2022-04-07 00:45:17,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 2 times [2022-04-07 00:45:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:17,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439472658] [2022-04-07 00:45:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:17,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:17,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-07 00:45:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:18,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439472658] [2022-04-07 00:45:18,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439472658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:18,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:18,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:45:18,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:18,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779152810] [2022-04-07 00:45:18,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779152810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:18,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:18,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:45:18,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616505628] [2022-04-07 00:45:18,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:18,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:45:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:18,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:45:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:45:18,142 INFO L87 Difference]: Start difference. First operand 416 states and 484 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-07 00:45:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:18,891 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-04-07 00:45:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:45:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-04-07 00:45:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:18,892 INFO L225 Difference]: With dead ends: 558 [2022-04-07 00:45:18,892 INFO L226 Difference]: Without dead ends: 435 [2022-04-07 00:45:18,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:45:18,893 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:18,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1110 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-04-07 00:45:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-04-07 00:45:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 332 states have (on average 1.1837349397590362) internal successors, (393), 338 states have internal predecessors, (393), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-04-07 00:45:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-04-07 00:45:19,000 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-04-07 00:45:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:19,001 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-04-07 00:45:19,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-04-07 00:45:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-04-07 00:45:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-07 00:45:19,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:19,002 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:19,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-07 00:45:19,002 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-04-07 00:45:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:19,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1007158703] [2022-04-07 00:45:19,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 2 times [2022-04-07 00:45:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:19,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079957982] [2022-04-07 00:45:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-07 00:45:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-07 00:45:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-07 00:45:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:19,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079957982] [2022-04-07 00:45:19,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079957982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:19,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:19,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:19,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1007158703] [2022-04-07 00:45:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1007158703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:19,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:19,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:45:19,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582369483] [2022-04-07 00:45:19,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:19,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:45:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:45:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:45:19,264 INFO L87 Difference]: Start difference. First operand 425 states and 490 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-04-07 00:45:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:19,761 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-04-07 00:45:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:45:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 110 [2022-04-07 00:45:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:19,763 INFO L225 Difference]: With dead ends: 460 [2022-04-07 00:45:19,763 INFO L226 Difference]: Without dead ends: 376 [2022-04-07 00:45:19,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:45:19,763 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:19,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:45:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-07 00:45:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-04-07 00:45:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 26 states have call successors, (26), 26 states have call predecessors, (26), 26 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-04-07 00:45:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-04-07 00:45:19,822 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-04-07 00:45:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:19,822 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-04-07 00:45:19,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-04-07 00:45:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-04-07 00:45:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-07 00:45:19,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:19,823 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:19,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-07 00:45:19,824 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-04-07 00:45:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027670573] [2022-04-07 00:45:19,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 2 times [2022-04-07 00:45:19,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:19,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007746091] [2022-04-07 00:45:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:19,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-07 00:45:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-07 00:45:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:20,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007746091] [2022-04-07 00:45:20,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007746091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:20,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:20,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:20,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:20,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027670573] [2022-04-07 00:45:20,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027670573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:20,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:20,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359426605] [2022-04-07 00:45:20,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:20,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:45:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:45:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:45:20,097 INFO L87 Difference]: Start difference. First operand 242 states and 268 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:45:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:20,621 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-04-07 00:45:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:45:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-04-07 00:45:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:20,622 INFO L225 Difference]: With dead ends: 286 [2022-04-07 00:45:20,622 INFO L226 Difference]: Without dead ends: 256 [2022-04-07 00:45:20,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:45:20,623 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 250 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:20,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 724 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:45:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-07 00:45:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-04-07 00:45:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.140625) internal successors, (219), 194 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-04-07 00:45:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-04-07 00:45:20,691 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-04-07 00:45:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:20,691 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-04-07 00:45:20,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:45:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-04-07 00:45:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-07 00:45:20,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:20,692 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:20,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-07 00:45:20,692 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-04-07 00:45:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827155496] [2022-04-07 00:45:20,693 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 2 times [2022-04-07 00:45:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095443250] [2022-04-07 00:45:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-07 00:45:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-07 00:45:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:45:20,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:20,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095443250] [2022-04-07 00:45:20,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095443250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:20,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:20,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:20,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:20,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827155496] [2022-04-07 00:45:20,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827155496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:20,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063827368] [2022-04-07 00:45:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:20,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:45:20,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:45:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:45:20,937 INFO L87 Difference]: Start difference. First operand 246 states and 272 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:45:21,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:21,389 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-04-07 00:45:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:45:21,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-04-07 00:45:21,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:21,390 INFO L225 Difference]: With dead ends: 332 [2022-04-07 00:45:21,391 INFO L226 Difference]: Without dead ends: 252 [2022-04-07 00:45:21,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:45:21,391 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:21,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 657 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:45:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-07 00:45:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-04-07 00:45:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 194 states have internal predecessors, (218), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-04-07 00:45:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-04-07 00:45:21,457 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-04-07 00:45:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:21,457 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-04-07 00:45:21,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-07 00:45:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-04-07 00:45:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-07 00:45:21,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:21,458 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:21,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-07 00:45:21,459 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-04-07 00:45:21,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:21,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598377325] [2022-04-07 00:45:21,459 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 2 times [2022-04-07 00:45:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191781960] [2022-04-07 00:45:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-07 00:45:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-07 00:45:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-07 00:45:21,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191781960] [2022-04-07 00:45:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191781960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:21,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:21,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:45:21,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598377325] [2022-04-07 00:45:21,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598377325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:21,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:21,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:45:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741511891] [2022-04-07 00:45:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:21,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-07 00:45:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-07 00:45:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:45:21,894 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:45:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:22,819 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-04-07 00:45:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-07 00:45:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 147 [2022-04-07 00:45:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:22,821 INFO L225 Difference]: With dead ends: 318 [2022-04-07 00:45:22,821 INFO L226 Difference]: Without dead ends: 283 [2022-04-07 00:45:22,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-04-07 00:45:22,822 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:22,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1380 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-07 00:45:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-04-07 00:45:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.144927536231884) internal successors, (237), 209 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-04-07 00:45:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-04-07 00:45:22,904 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-04-07 00:45:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:22,904 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-04-07 00:45:22,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:45:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-04-07 00:45:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-04-07 00:45:22,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:22,905 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:22,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-07 00:45:22,906 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-04-07 00:45:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:22,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835527853] [2022-04-07 00:45:22,906 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 2 times [2022-04-07 00:45:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696216652] [2022-04-07 00:45:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:22,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-07 00:45:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:45:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-07 00:45:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696216652] [2022-04-07 00:45:23,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696216652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:23,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:23,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-07 00:45:23,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835527853] [2022-04-07 00:45:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835527853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:23,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:23,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-07 00:45:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446412346] [2022-04-07 00:45:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:23,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-07 00:45:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-07 00:45:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:45:23,302 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:45:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:24,210 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-04-07 00:45:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:45:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 148 [2022-04-07 00:45:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:24,212 INFO L225 Difference]: With dead ends: 358 [2022-04-07 00:45:24,212 INFO L226 Difference]: Without dead ends: 277 [2022-04-07 00:45:24,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-04-07 00:45:24,214 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:24,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1551 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-07 00:45:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-07 00:45:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-04-07 00:45:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-04-07 00:45:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-04-07 00:45:24,308 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-04-07 00:45:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:24,308 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-04-07 00:45:24,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-04-07 00:45:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-04-07 00:45:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-04-07 00:45:24,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:24,309 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:24,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-07 00:45:24,310 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-04-07 00:45:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606798908] [2022-04-07 00:45:24,310 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 2 times [2022-04-07 00:45:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575540322] [2022-04-07 00:45:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-07 00:45:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-07 00:45:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-07 00:45:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:45:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575540322] [2022-04-07 00:45:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575540322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:24,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:24,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:45:24,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606798908] [2022-04-07 00:45:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606798908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:24,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:24,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-07 00:45:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906780945] [2022-04-07 00:45:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:24,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-07 00:45:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-07 00:45:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:45:24,655 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:45:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:25,371 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-04-07 00:45:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:45:25,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-04-07 00:45:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:25,373 INFO L225 Difference]: With dead ends: 304 [2022-04-07 00:45:25,373 INFO L226 Difference]: Without dead ends: 263 [2022-04-07 00:45:25,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:45:25,374 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 252 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:25,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1131 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:45:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-07 00:45:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-04-07 00:45:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 205 states have internal predecessors, (229), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-04-07 00:45:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-04-07 00:45:25,476 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-04-07 00:45:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:25,476 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-04-07 00:45:25,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:45:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-04-07 00:45:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-07 00:45:25,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:25,478 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:25,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-07 00:45:25,478 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-04-07 00:45:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:25,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494848097] [2022-04-07 00:45:25,479 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 2 times [2022-04-07 00:45:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:25,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112417145] [2022-04-07 00:45:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:25,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-07 00:45:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-07 00:45:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-07 00:45:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:45:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:25,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112417145] [2022-04-07 00:45:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112417145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:25,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:25,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:25,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494848097] [2022-04-07 00:45:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494848097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:25,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:25,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:45:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279539142] [2022-04-07 00:45:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:25,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:45:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:45:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:45:25,758 INFO L87 Difference]: Start difference. First operand 257 states and 282 transitions. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-04-07 00:45:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:26,328 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-04-07 00:45:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:45:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 155 [2022-04-07 00:45:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:26,329 INFO L225 Difference]: With dead ends: 318 [2022-04-07 00:45:26,329 INFO L226 Difference]: Without dead ends: 243 [2022-04-07 00:45:26,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:45:26,330 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 330 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:26,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 501 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:45:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-07 00:45:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-04-07 00:45:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.111731843575419) internal successors, (199), 181 states have internal predecessors, (199), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-04-07 00:45:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-04-07 00:45:26,412 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-04-07 00:45:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:26,413 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-04-07 00:45:26,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-04-07 00:45:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-04-07 00:45:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-07 00:45:26,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:26,414 INFO L499 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:26,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-07 00:45:26,414 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-04-07 00:45:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927865871] [2022-04-07 00:45:26,415 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 2 times [2022-04-07 00:45:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482700601] [2022-04-07 00:45:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-07 00:45:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-07 00:45:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-07 00:45:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-07 00:45:26,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482700601] [2022-04-07 00:45:26,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482700601] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:26,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:26,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:45:26,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927865871] [2022-04-07 00:45:26,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927865871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:26,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:26,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:45:26,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288542345] [2022-04-07 00:45:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:26,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-07 00:45:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-07 00:45:26,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:45:26,730 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:45:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:27,239 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-04-07 00:45:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:45:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-04-07 00:45:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:27,240 INFO L225 Difference]: With dead ends: 294 [2022-04-07 00:45:27,240 INFO L226 Difference]: Without dead ends: 208 [2022-04-07 00:45:27,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:45:27,241 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:27,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:45:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-07 00:45:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-04-07 00:45:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.0993788819875776) internal successors, (177), 162 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-04-07 00:45:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-04-07 00:45:27,302 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-04-07 00:45:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:27,302 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-04-07 00:45:27,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-07 00:45:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-04-07 00:45:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-07 00:45:27,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:27,303 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:27,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-07 00:45:27,304 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-04-07 00:45:27,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:27,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107337652] [2022-04-07 00:45:27,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 2 times [2022-04-07 00:45:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:27,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049758619] [2022-04-07 00:45:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-07 00:45:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:45:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-07 00:45:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-07 00:45:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049758619] [2022-04-07 00:45:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049758619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:27,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:45:27,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107337652] [2022-04-07 00:45:27,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107337652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:27,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-07 00:45:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263962531] [2022-04-07 00:45:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:27,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-07 00:45:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-07 00:45:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:45:27,642 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:45:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:28,589 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-04-07 00:45:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-07 00:45:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-04-07 00:45:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:28,591 INFO L225 Difference]: With dead ends: 410 [2022-04-07 00:45:28,591 INFO L226 Difference]: Without dead ends: 211 [2022-04-07 00:45:28,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-04-07 00:45:28,592 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:28,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-07 00:45:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-07 00:45:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-04-07 00:45:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-04-07 00:45:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-04-07 00:45:28,647 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-04-07 00:45:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:28,647 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-04-07 00:45:28,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:45:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-04-07 00:45:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-07 00:45:28,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:45:28,648 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:45:28,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-07 00:45:28,648 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:45:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:45:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-04-07 00:45:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950245692] [2022-04-07 00:45:28,649 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:45:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 2 times [2022-04-07 00:45:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:45:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589094933] [2022-04-07 00:45:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:45:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:45:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:45:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:45:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:45:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-07 00:45:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-07 00:45:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-07 00:45:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:28,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-07 00:45:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-07 00:45:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-07 00:45:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-07 00:45:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-07 00:45:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-07 00:45:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-07 00:45:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-07 00:45:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:45:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-07 00:45:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:45:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589094933] [2022-04-07 00:45:29,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589094933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:29,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:29,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:45:29,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:45:29,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950245692] [2022-04-07 00:45:29,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950245692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:45:29,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:45:29,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-07 00:45:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965696653] [2022-04-07 00:45:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:45:29,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-07 00:45:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:45:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-07 00:45:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:45:29,088 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:45:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:45:30,042 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-04-07 00:45:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-07 00:45:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-04-07 00:45:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:45:30,043 INFO L225 Difference]: With dead ends: 211 [2022-04-07 00:45:30,043 INFO L226 Difference]: Without dead ends: 0 [2022-04-07 00:45:30,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-04-07 00:45:30,045 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:45:30,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:45:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-07 00:45:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-07 00:45:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-07 00:45:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-07 00:45:30,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-04-07 00:45:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:45:30,046 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-07 00:45:30,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-07 00:45:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-07 00:45:30,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 00:45:30,049 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:45:30,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-07 00:45:30,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-07 00:56:22,480 WARN L232 SmtUtils]: Spent 10.87m on a formula simplification that was a NOOP. DAG size: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)