/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers/floppy.i.cil-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:02:25,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:02:25,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:02:25,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 19:02:25,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 19:02:25,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 19:02:25,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 19:02:25,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 19:02:25,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 19:02:25,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 19:02:25,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 19:02:25,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 19:02:25,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 19:02:25,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 19:02:25,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 19:02:25,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 19:02:25,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 19:02:25,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 19:02:25,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 19:02:25,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 19:02:25,248 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 19:02:25,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 19:02:25,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 19:02:25,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 19:02:25,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 19:02:25,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 19:02:25,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:02:25,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:02:25,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:02:25,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 19:02:25,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:02:25,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:02:25,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:02:25,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:02:25,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:02:25,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:02:25,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 19:02:25,279 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:02:25,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:02:25,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:02:25,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:02:25,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:02:25,467 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:02:25,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers/floppy.i.cil-3.c [2022-04-06 19:02:25,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f769ad1/c88d82779d324bbf9fceee996ea7b49d/FLAG7721591ad [2022-04-06 19:02:26,073 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:02:26,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/floppy.i.cil-3.c [2022-04-06 19:02:26,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f769ad1/c88d82779d324bbf9fceee996ea7b49d/FLAG7721591ad [2022-04-06 19:02:26,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f769ad1/c88d82779d324bbf9fceee996ea7b49d [2022-04-06 19:02:26,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:02:26,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:02:26,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:02:26,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:02:26,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:02:26,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:02:26" (1/1) ... [2022-04-06 19:02:26,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4514a27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:26, skipping insertion in model container [2022-04-06 19:02:26,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:02:26" (1/1) ... [2022-04-06 19:02:26,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:02:26,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:02:27,053 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/floppy.i.cil-3.c[77246,77259] [2022-04-06 19:02:27,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:02:27,377 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:02:27,458 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/floppy.i.cil-3.c[77246,77259] [2022-04-06 19:02:27,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:02:27,645 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:02:27,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27 WrapperNode [2022-04-06 19:02:27,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:02:27,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:02:27,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:02:27,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:02:27,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:02:27,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:02:27,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:02:27,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:02:27,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (1/1) ... [2022-04-06 19:02:27,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:02:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:02:27,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:02:27,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:02:27,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:02:27,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:02:27,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:02:27,961 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure DriverEntry [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyUnload [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyAddDevice [2022-04-06 19:02:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConfigCallBack [2022-04-06 19:02:27,963 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-04-06 19:02:27,963 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-04-06 19:02:27,963 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-04-06 19:02:27,963 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPower [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyReadWrite [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInterpretError [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFinishOperation [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlStartDrive [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDatarateSpecifyConfigure [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlRecalibrateDrive [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDetermineMediaType [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAllocateIoBuffer [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFreeIoBuffer [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyThread [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConsolidateMediaTypeWithBootSector [2022-04-06 19:02:27,964 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckBootSector [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWriteTrack [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWrite [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFormat [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlIssueCommand [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInitializeControllerHardware [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FlHdbit [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCancelQueuedRequest [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAcquireFastMutex [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ExReleaseFastMutex [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-04-06 19:02:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ExFreePool [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertHeadList [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedRemoveHeadList [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAllocateMdl [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAttachDeviceToDeviceStack [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildAsynchronousFsdRequest [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateDevice [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateSymbolicLink [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteDevice [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDetachDevice [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeIrp [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeMdl [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-04-06 19:02:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IoReleaseCancelSpinLock [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetHardErrorOrVerifyDevice [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure KeAcquireSpinLockRaiseToDpc [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure KeDelayExecutionThread [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeEvent [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSemaphore [2022-04-06 19:02:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSpinLock [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure KeReleaseSemaphore [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure KfReleaseSpinLock [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure MmAllocateContiguousMemory [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure MmFreeContiguousMemory [2022-04-06 19:02:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure MmMapLockedPagesSpecifyCache [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure MmPageEntireDriver [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure MmResetDriverPaging [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure MmUnlockPages [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ObfDereferenceObject [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-04-06 19:02:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure PoStartNextPowerIrp [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure PsTerminateSystemThread [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlAnsiStringToUnicodeString [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCompareMemory [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCopyUnicodeString [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlDeleteRegistryValue [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlFreeUnicodeString [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitString [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitUnicodeString [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlQueryRegistryValues [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-04-06 19:02:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-04-06 19:02:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure swprintf [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-04-06 19:02:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlQueryRegistryValues [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlDeleteRegistryValue [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitString [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitUnicodeString [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlAnsiStringToUnicodeString [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCopyUnicodeString [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlFreeUnicodeString [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCompareMemory [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:02:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeEvent [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSemaphore [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeReleaseSemaphore [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeDelayExecutionThread [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-06 19:02:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSpinLock [2022-04-06 19:02:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure KfReleaseSpinLock [2022-04-06 19:02:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-04-06 19:02:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure ExFreePool [2022-04-06 19:02:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure ExAcquireFastMutex [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure ExReleaseFastMutex [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertHeadList [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedRemoveHeadList [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure MmUnlockPages [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure MmMapLockedPagesSpecifyCache [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure MmAllocateContiguousMemory [2022-04-06 19:02:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure MmFreeContiguousMemory [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure MmResetDriverPaging [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure MmPageEntireDriver [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure PsTerminateSystemThread [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoAllocateMdl [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoAttachDeviceToDeviceStack [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildAsynchronousFsdRequest [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateDevice [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateSymbolicLink [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteDevice [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoDetachDevice [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeIrp [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeMdl [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoReleaseCancelSpinLock [2022-04-06 19:02:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetHardErrorOrVerifyDevice [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure PoStartNextPowerIrp [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ObfDereferenceObject [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure DriverEntry [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyUnload [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlConfigCallBack [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlInitializeControllerHardware [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyReadWrite [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlRecalibrateDrive [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlDatarateSpecifyConfigure [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlStartDrive [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlFinishOperation [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlDetermineMediaType [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyThread [2022-04-06 19:02:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWrite [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlFormat [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlIssueCommand [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlInterpretError [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlAllocateIoBuffer [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlFreeIoBuffer [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlConsolidateMediaTypeWithBootSector [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckBootSector [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWriteTrack [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyAddDevice [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPower [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCancelQueuedRequest [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-04-06 19:02:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlHdbit [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure KeAcquireSpinLockRaiseToDpc [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-04-06 19:02:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-04-06 19:02:28,488 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:02:28,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:02:28,520 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:28,570 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:28,570 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:28,570 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:28,589 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:28,589 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,165 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,169 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,170 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,170 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,176 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,176 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,179 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,212 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,217 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,225 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,225 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,225 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,232 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,232 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,271 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,315 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2022-04-06 19:02:30,315 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2022-04-06 19:02:30,368 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,372 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,372 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,373 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,376 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,376 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,376 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,392 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,399 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,399 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:30,399 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:30,404 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:30,404 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:36,042 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,071 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-04-06 19:02:36,071 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-04-06 19:02:36,113 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,391 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-04-06 19:02:36,391 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-04-06 19:02:36,639 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,642 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:36,642 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:36,698 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,721 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-04-06 19:02:36,721 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-04-06 19:02:36,723 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,827 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-06 19:02:36,827 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-06 19:02:36,827 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:36,870 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2022-04-06 19:02:36,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2022-04-06 19:02:47,711 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:47,714 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:47,714 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:47,784 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:47,787 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:47,788 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:47,802 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:49,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2022-04-06 19:02:49,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2022-04-06 19:02:49,904 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,098 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-04-06 19:02:50,098 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-04-06 19:02:50,100 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,111 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-04-06 19:02:50,112 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-04-06 19:02:50,112 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,138 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-04-06 19:02:50,139 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-04-06 19:02:50,141 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,149 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-06 19:02:50,149 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-06 19:02:50,176 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,179 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:50,179 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:50,187 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,192 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 19:02:50,193 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 19:02:50,193 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:50,251 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume !false; [2022-04-06 19:02:50,251 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##45: assume false; [2022-04-06 19:02:50,292 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 19:02:52,649 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume !false; [2022-04-06 19:02:52,650 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##13: assume false; [2022-04-06 19:02:52,688 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:02:52,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:02:52,700 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2022-04-06 19:02:52,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:02:52 BoogieIcfgContainer [2022-04-06 19:02:52,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:02:52,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:02:52,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:02:52,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:02:52,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:02:26" (1/3) ... [2022-04-06 19:02:52,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2241b5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:02:52, skipping insertion in model container [2022-04-06 19:02:52,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:02:27" (2/3) ... [2022-04-06 19:02:52,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2241b5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:02:52, skipping insertion in model container [2022-04-06 19:02:52,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:02:52" (3/3) ... [2022-04-06 19:02:52,709 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-04-06 19:02:52,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:02:52,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:02:52,748 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:02:52,761 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:02:52,763 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:02:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 1463 states, 1158 states have (on average 1.5215889464594128) internal successors, (1762), 1199 states have internal predecessors, (1762), 227 states have call successors, (227), 73 states have call predecessors, (227), 73 states have return successors, (227), 221 states have call predecessors, (227), 227 states have call successors, (227) [2022-04-06 19:02:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:02:52,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:02:52,803 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] [2022-04-06 19:02:52,803 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:02:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:02:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1208806804, now seen corresponding path program 1 times [2022-04-06 19:02:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:02:52,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185194542] [2022-04-06 19:02:52,819 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:02:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1208806804, now seen corresponding path program 2 times [2022-04-06 19:02:52,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:02:52,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167058492] [2022-04-06 19:02:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:02:52,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:02:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:02:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:02:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:02:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:02:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:02:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:02:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:02:53,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:02:53,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167058492] [2022-04-06 19:02:53,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167058492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:02:53,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:02:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:02:53,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:02:53,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185194542] [2022-04-06 19:02:53,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185194542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:02:53,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:02:53,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:02:53,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046799591] [2022-04-06 19:02:53,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:02:53,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:02:53,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:02:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:02:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:02:53,489 INFO L87 Difference]: Start difference. First operand has 1463 states, 1158 states have (on average 1.5215889464594128) internal successors, (1762), 1199 states have internal predecessors, (1762), 227 states have call successors, (227), 73 states have call predecessors, (227), 73 states have return successors, (227), 221 states have call predecessors, (227), 227 states have call successors, (227) Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 19:03:00,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:03:01,673 INFO L93 Difference]: Finished difference Result 1453 states and 2231 transitions. [2022-04-06 19:03:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:03:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-06 19:03:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:03:01,691 INFO L225 Difference]: With dead ends: 1453 [2022-04-06 19:03:01,691 INFO L226 Difference]: Without dead ends: 858 [2022-04-06 19:03:01,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:03:01,698 INFO L913 BasicCegarLoop]: 747 mSDtfsCounter, 1345 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 617 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 3720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:03:01,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 1283 Invalid, 3720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 3102 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-04-06 19:03:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-04-06 19:03:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 670. [2022-04-06 19:03:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 502 states have (on average 1.4203187250996017) internal successors, (713), 534 states have internal predecessors, (713), 121 states have call successors, (121), 48 states have call predecessors, (121), 46 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-06 19:03:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 931 transitions. [2022-04-06 19:03:01,829 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 931 transitions. Word has length 37 [2022-04-06 19:03:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:03:01,829 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 931 transitions. [2022-04-06 19:03:01,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 19:03:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 931 transitions. [2022-04-06 19:03:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 19:03:01,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:03:01,832 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] [2022-04-06 19:03:01,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:03:01,832 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:03:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:03:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash 171558063, now seen corresponding path program 1 times [2022-04-06 19:03:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46338027] [2022-04-06 19:03:01,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:03:01,833 INFO L85 PathProgramCache]: Analyzing trace with hash 171558063, now seen corresponding path program 2 times [2022-04-06 19:03:01,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:03:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615709132] [2022-04-06 19:03:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:03:01,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:03:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:03:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:03:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:03:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:03:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:03:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:03:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:03:02,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:03:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615709132] [2022-04-06 19:03:02,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615709132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:02,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:02,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:02,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:03:02,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46338027] [2022-04-06 19:03:02,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46338027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:02,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:02,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357521483] [2022-04-06 19:03:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:03:02,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:03:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:03:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:03:02,247 INFO L87 Difference]: Start difference. First operand 670 states and 931 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:08,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:03:11,939 INFO L93 Difference]: Finished difference Result 1951 states and 2856 transitions. [2022-04-06 19:03:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:03:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (10), 9 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 42 [2022-04-06 19:03:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:03:11,951 INFO L225 Difference]: With dead ends: 1951 [2022-04-06 19:03:11,951 INFO L226 Difference]: Without dead ends: 1471 [2022-04-06 19:03:11,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:03:11,953 INFO L913 BasicCegarLoop]: 940 mSDtfsCounter, 3479 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 1403 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 4912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1403 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:03:11,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 1665 Invalid, 4912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1403 Valid, 3508 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-04-06 19:03:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-04-06 19:03:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1230. [2022-04-06 19:03:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 946 states have (on average 1.4038054968287526) internal successors, (1328), 977 states have internal predecessors, (1328), 187 states have call successors, (187), 83 states have call predecessors, (187), 96 states have return successors, (247), 179 states have call predecessors, (247), 171 states have call successors, (247) [2022-04-06 19:03:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1762 transitions. [2022-04-06 19:03:12,106 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1762 transitions. Word has length 42 [2022-04-06 19:03:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:03:12,106 INFO L478 AbstractCegarLoop]: Abstraction has 1230 states and 1762 transitions. [2022-04-06 19:03:12,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1762 transitions. [2022-04-06 19:03:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 19:03:12,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:03:12,108 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:03:12,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:03:12,109 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:03:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:03:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1220689, now seen corresponding path program 1 times [2022-04-06 19:03:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:12,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126655507] [2022-04-06 19:03:12,109 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:03:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1220689, now seen corresponding path program 2 times [2022-04-06 19:03:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:03:12,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795935134] [2022-04-06 19:03:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:03:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:03:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:03:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:03:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:03:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:03:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:03:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:03:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 19:03:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:03:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:03:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795935134] [2022-04-06 19:03:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795935134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:12,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:12,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:12,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:03:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126655507] [2022-04-06 19:03:12,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126655507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:12,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:12,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:12,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070389320] [2022-04-06 19:03:12,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:03:12,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:03:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:03:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:03:12,613 INFO L87 Difference]: Start difference. First operand 1230 states and 1762 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 19:03:17,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:20,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:03:23,065 INFO L93 Difference]: Finished difference Result 2279 states and 3379 transitions. [2022-04-06 19:03:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:03:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-04-06 19:03:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:03:23,075 INFO L225 Difference]: With dead ends: 2279 [2022-04-06 19:03:23,075 INFO L226 Difference]: Without dead ends: 2260 [2022-04-06 19:03:23,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:03:23,076 INFO L913 BasicCegarLoop]: 722 mSDtfsCounter, 3868 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 1490 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3928 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 4345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:03:23,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3928 Valid, 1301 Invalid, 4345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 2853 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-04-06 19:03:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-06 19:03:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1905. [2022-04-06 19:03:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1476 states have (on average 1.420731707317073) internal successors, (2097), 1527 states have internal predecessors, (2097), 279 states have call successors, (279), 129 states have call predecessors, (279), 149 states have return successors, (393), 262 states have call predecessors, (393), 263 states have call successors, (393) [2022-04-06 19:03:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2769 transitions. [2022-04-06 19:03:23,345 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2769 transitions. Word has length 54 [2022-04-06 19:03:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:03:23,346 INFO L478 AbstractCegarLoop]: Abstraction has 1905 states and 2769 transitions. [2022-04-06 19:03:23,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 19:03:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2769 transitions. [2022-04-06 19:03:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:03:23,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:03:23,350 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:03:23,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 19:03:23,350 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:03:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:03:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1955103331, now seen corresponding path program 1 times [2022-04-06 19:03:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [718856665] [2022-04-06 19:03:23,351 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:03:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1955103331, now seen corresponding path program 2 times [2022-04-06 19:03:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:03:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561199106] [2022-04-06 19:03:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:03:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:03:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:03:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:03:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:03:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:03:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:03:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:03:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:03:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:03:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561199106] [2022-04-06 19:03:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561199106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:23,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:23,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:23,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:03:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [718856665] [2022-04-06 19:03:23,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [718856665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:23,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:23,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15836730] [2022-04-06 19:03:23,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:03:23,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:03:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:23,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:03:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:03:23,824 INFO L87 Difference]: Start difference. First operand 1905 states and 2769 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (10), 9 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:30,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:03:32,101 INFO L93 Difference]: Finished difference Result 2254 states and 3363 transitions. [2022-04-06 19:03:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:03:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (10), 9 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-04-06 19:03:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:03:32,110 INFO L225 Difference]: With dead ends: 2254 [2022-04-06 19:03:32,110 INFO L226 Difference]: Without dead ends: 2250 [2022-04-06 19:03:32,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:03:32,111 INFO L913 BasicCegarLoop]: 726 mSDtfsCounter, 1720 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 754 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:03:32,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 1278 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 3121 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-04-06 19:03:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-04-06 19:03:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 1942. [2022-04-06 19:03:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1509 states have (on average 1.420808482438701) internal successors, (2144), 1557 states have internal predecessors, (2144), 281 states have call successors, (281), 132 states have call predecessors, (281), 151 states have return successors, (395), 264 states have call predecessors, (395), 265 states have call successors, (395) [2022-04-06 19:03:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2820 transitions. [2022-04-06 19:03:32,340 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2820 transitions. Word has length 55 [2022-04-06 19:03:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:03:32,340 INFO L478 AbstractCegarLoop]: Abstraction has 1942 states and 2820 transitions. [2022-04-06 19:03:32,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (10), 9 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2820 transitions. [2022-04-06 19:03:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:03:32,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:03:32,341 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:03:32,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 19:03:32,341 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:03:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:03:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1599289490, now seen corresponding path program 1 times [2022-04-06 19:03:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:32,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358572352] [2022-04-06 19:03:32,342 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:03:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1599289490, now seen corresponding path program 2 times [2022-04-06 19:03:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:03:32,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201103426] [2022-04-06 19:03:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:03:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:03:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:03:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:03:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:03:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:03:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:03:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:03:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:03:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:03:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201103426] [2022-04-06 19:03:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201103426] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:32,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:32,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:32,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:03:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358572352] [2022-04-06 19:03:32,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358572352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:32,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:32,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:03:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445367666] [2022-04-06 19:03:32,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:03:32,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:03:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:03:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:03:32,773 INFO L87 Difference]: Start difference. First operand 1942 states and 2820 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:38,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:03:43,327 INFO L93 Difference]: Finished difference Result 3881 states and 5849 transitions. [2022-04-06 19:03:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:03:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-04-06 19:03:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:03:43,341 INFO L225 Difference]: With dead ends: 3881 [2022-04-06 19:03:43,341 INFO L226 Difference]: Without dead ends: 3878 [2022-04-06 19:03:43,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:03:43,342 INFO L913 BasicCegarLoop]: 1153 mSDtfsCounter, 2146 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 5298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:03:43,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 1874 Invalid, 5298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 4386 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-04-06 19:03:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2022-04-06 19:03:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3105. [2022-04-06 19:03:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 2444 states have (on average 1.4320785597381342) internal successors, (3500), 2499 states have internal predecessors, (3500), 415 states have call successors, (415), 218 states have call predecessors, (415), 245 states have return successors, (609), 399 states have call predecessors, (609), 399 states have call successors, (609) [2022-04-06 19:03:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 4524 transitions. [2022-04-06 19:03:43,753 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 4524 transitions. Word has length 55 [2022-04-06 19:03:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:03:43,754 INFO L478 AbstractCegarLoop]: Abstraction has 3105 states and 4524 transitions. [2022-04-06 19:03:43,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 19:03:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 4524 transitions. [2022-04-06 19:03:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 19:03:43,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:03:43,755 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:03:43,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 19:03:43,755 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:03:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:03:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2095199445, now seen corresponding path program 1 times [2022-04-06 19:03:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438259192] [2022-04-06 19:03:43,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:03:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2095199445, now seen corresponding path program 2 times [2022-04-06 19:03:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:03:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472630725] [2022-04-06 19:03:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:03:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:03:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:03:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:03:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:03:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:03:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:03:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:03:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:03:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:03:44,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:03:44,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472630725] [2022-04-06 19:03:44,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472630725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:44,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:44,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:03:44,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:03:44,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438259192] [2022-04-06 19:03:44,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438259192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:03:44,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:03:44,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:03:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728326363] [2022-04-06 19:03:44,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:03:44,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:03:44,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:03:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:03:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:03:44,219 INFO L87 Difference]: Start difference. First operand 3105 states and 4524 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 19:03:51,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:55,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:03:57,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:00,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:04:05,543 INFO L93 Difference]: Finished difference Result 6653 states and 9861 transitions. [2022-04-06 19:04:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:04:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-04-06 19:04:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:04:05,560 INFO L225 Difference]: With dead ends: 6653 [2022-04-06 19:04:05,560 INFO L226 Difference]: Without dead ends: 3833 [2022-04-06 19:04:05,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:04:05,568 INFO L913 BasicCegarLoop]: 981 mSDtfsCounter, 5008 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 6681 mSolverCounterSat, 2194 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5053 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 8879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2194 IncrementalHoareTripleChecker+Valid, 6681 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:04:05,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5053 Valid, 2055 Invalid, 8879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2194 Valid, 6681 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time] [2022-04-06 19:04:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-04-06 19:04:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3099. [2022-04-06 19:04:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2438 states have (on average 1.4298605414273995) internal successors, (3486), 2493 states have internal predecessors, (3486), 415 states have call successors, (415), 218 states have call predecessors, (415), 245 states have return successors, (609), 399 states have call predecessors, (609), 399 states have call successors, (609) [2022-04-06 19:04:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4510 transitions. [2022-04-06 19:04:06,033 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4510 transitions. Word has length 56 [2022-04-06 19:04:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:04:06,034 INFO L478 AbstractCegarLoop]: Abstraction has 3099 states and 4510 transitions. [2022-04-06 19:04:06,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 5 states have internal predecessors, (40), 4 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 19:04:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4510 transitions. [2022-04-06 19:04:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 19:04:06,035 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:04:06,035 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:04:06,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 19:04:06,035 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:04:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:04:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2082718779, now seen corresponding path program 1 times [2022-04-06 19:04:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925980715] [2022-04-06 19:04:06,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:04:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2082718779, now seen corresponding path program 2 times [2022-04-06 19:04:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:04:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664186896] [2022-04-06 19:04:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:04:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:04:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:04:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:04:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:04:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:04:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:04:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 19:04:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:04:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:04:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664186896] [2022-04-06 19:04:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664186896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:06,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:06,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:04:06,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:04:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925980715] [2022-04-06 19:04:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925980715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:06,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:06,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:04:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106304474] [2022-04-06 19:04:06,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:04:06,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:04:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:04:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:04:06,508 INFO L87 Difference]: Start difference. First operand 3099 states and 4510 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:04:11,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:13,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:17,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:04:23,468 INFO L93 Difference]: Finished difference Result 4462 states and 6736 transitions. [2022-04-06 19:04:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:04:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 56 [2022-04-06 19:04:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:04:23,518 INFO L225 Difference]: With dead ends: 4462 [2022-04-06 19:04:23,519 INFO L226 Difference]: Without dead ends: 4457 [2022-04-06 19:04:23,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:04:23,522 INFO L913 BasicCegarLoop]: 1060 mSDtfsCounter, 2955 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 4420 mSolverCounterSat, 1427 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2989 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 4420 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:04:23,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2989 Valid, 2028 Invalid, 5850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 4420 Invalid, 3 Unknown, 0 Unchecked, 15.3s Time] [2022-04-06 19:04:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-04-06 19:04:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3755. [2022-04-06 19:04:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 2956 states have (on average 1.4336941813261164) internal successors, (4238), 3023 states have internal predecessors, (4238), 500 states have call successors, (500), 258 states have call predecessors, (500), 298 states have return successors, (755), 491 states have call predecessors, (755), 484 states have call successors, (755) [2022-04-06 19:04:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 5493 transitions. [2022-04-06 19:04:24,091 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 5493 transitions. Word has length 56 [2022-04-06 19:04:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:04:24,091 INFO L478 AbstractCegarLoop]: Abstraction has 3755 states and 5493 transitions. [2022-04-06 19:04:24,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:04:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 5493 transitions. [2022-04-06 19:04:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 19:04:24,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:04:24,092 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:04:24,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 19:04:24,093 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:04:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:04:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash 590370335, now seen corresponding path program 1 times [2022-04-06 19:04:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:24,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319085511] [2022-04-06 19:04:24,093 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:04:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash 590370335, now seen corresponding path program 2 times [2022-04-06 19:04:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:04:24,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547148580] [2022-04-06 19:04:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:04:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:04:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:04:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:04:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:04:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:04:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:04:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 19:04:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:04:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:04:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547148580] [2022-04-06 19:04:24,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547148580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:24,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:24,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:24,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:04:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319085511] [2022-04-06 19:04:24,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319085511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:24,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:24,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29891893] [2022-04-06 19:04:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:04:24,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:04:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:04:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:04:24,554 INFO L87 Difference]: Start difference. First operand 3755 states and 5493 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:04:31,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:04:36,610 INFO L93 Difference]: Finished difference Result 4521 states and 6811 transitions. [2022-04-06 19:04:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:04:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2022-04-06 19:04:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:04:36,631 INFO L225 Difference]: With dead ends: 4521 [2022-04-06 19:04:36,631 INFO L226 Difference]: Without dead ends: 4515 [2022-04-06 19:04:36,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=504, Invalid=1658, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:04:36,633 INFO L913 BasicCegarLoop]: 1036 mSDtfsCounter, 4614 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 4439 mSolverCounterSat, 2193 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 6633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2193 IncrementalHoareTripleChecker+Valid, 4439 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:04:36,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 1839 Invalid, 6633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2193 Valid, 4439 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-04-06 19:04:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2022-04-06 19:04:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 3793. [2022-04-06 19:04:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 2990 states have (on average 1.4364548494983278) internal successors, (4295), 3059 states have internal predecessors, (4295), 502 states have call successors, (502), 260 states have call predecessors, (502), 300 states have return successors, (753), 491 states have call predecessors, (753), 486 states have call successors, (753) [2022-04-06 19:04:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5550 transitions. [2022-04-06 19:04:37,257 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 5550 transitions. Word has length 57 [2022-04-06 19:04:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:04:37,257 INFO L478 AbstractCegarLoop]: Abstraction has 3793 states and 5550 transitions. [2022-04-06 19:04:37,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:04:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 5550 transitions. [2022-04-06 19:04:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:04:37,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:04:37,259 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:04:37,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 19:04:37,259 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:04:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:04:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1470236357, now seen corresponding path program 1 times [2022-04-06 19:04:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:37,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922096899] [2022-04-06 19:04:37,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:04:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1470236357, now seen corresponding path program 2 times [2022-04-06 19:04:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:04:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172601279] [2022-04-06 19:04:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:04:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:04:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:04:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:04:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:04:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:04:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:04:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 19:04:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:04:37,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:04:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172601279] [2022-04-06 19:04:37,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172601279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:37,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:37,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:37,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:04:37,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922096899] [2022-04-06 19:04:37,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922096899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:37,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:37,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867517537] [2022-04-06 19:04:37,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:04:37,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:04:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:04:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:04:37,755 INFO L87 Difference]: Start difference. First operand 3793 states and 5550 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:04:45,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:04:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:04:52,106 INFO L93 Difference]: Finished difference Result 4499 states and 6781 transitions. [2022-04-06 19:04:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:04:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2022-04-06 19:04:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:04:52,121 INFO L225 Difference]: With dead ends: 4499 [2022-04-06 19:04:52,122 INFO L226 Difference]: Without dead ends: 4493 [2022-04-06 19:04:52,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=504, Invalid=1658, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:04:52,124 INFO L913 BasicCegarLoop]: 1031 mSDtfsCounter, 3804 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 5553 mSolverCounterSat, 1814 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3854 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 7368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1814 IncrementalHoareTripleChecker+Valid, 5553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:04:52,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3854 Valid, 1956 Invalid, 7368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1814 Valid, 5553 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2022-04-06 19:04:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2022-04-06 19:04:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 3793. [2022-04-06 19:04:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 2990 states have (on average 1.4361204013377926) internal successors, (4294), 3059 states have internal predecessors, (4294), 502 states have call successors, (502), 260 states have call predecessors, (502), 300 states have return successors, (753), 491 states have call predecessors, (753), 486 states have call successors, (753) [2022-04-06 19:04:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5549 transitions. [2022-04-06 19:04:52,791 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 5549 transitions. Word has length 59 [2022-04-06 19:04:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:04:52,792 INFO L478 AbstractCegarLoop]: Abstraction has 3793 states and 5549 transitions. [2022-04-06 19:04:52,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:04:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 5549 transitions. [2022-04-06 19:04:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 19:04:52,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:04:52,793 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:04:52,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 19:04:52,793 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:04:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:04:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1749808949, now seen corresponding path program 1 times [2022-04-06 19:04:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296812299] [2022-04-06 19:04:52,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:04:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1749808949, now seen corresponding path program 2 times [2022-04-06 19:04:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:04:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768070504] [2022-04-06 19:04:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:04:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:04:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:04:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:04:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:04:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:04:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:04:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 19:04:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:04:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:04:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:04:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:04:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768070504] [2022-04-06 19:04:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768070504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:53,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:53,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:04:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296812299] [2022-04-06 19:04:53,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296812299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:04:53,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:04:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:04:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944466881] [2022-04-06 19:04:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:04:53,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:04:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:04:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:04:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:04:53,328 INFO L87 Difference]: Start difference. First operand 3793 states and 5549 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:05:01,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:05:03,840 INFO L93 Difference]: Finished difference Result 4510 states and 6799 transitions. [2022-04-06 19:05:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:05:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 60 [2022-04-06 19:05:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:05:03,854 INFO L225 Difference]: With dead ends: 4510 [2022-04-06 19:05:03,854 INFO L226 Difference]: Without dead ends: 4493 [2022-04-06 19:05:03,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:05:03,858 INFO L913 BasicCegarLoop]: 734 mSDtfsCounter, 2798 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 1200 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2837 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1200 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:05:03,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2837 Valid, 1828 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1200 Valid, 4685 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-04-06 19:05:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2022-04-06 19:05:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 3791. [2022-04-06 19:05:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 2989 states have (on average 1.43593174974908) internal successors, (4292), 3058 states have internal predecessors, (4292), 501 states have call successors, (501), 260 states have call predecessors, (501), 300 states have return successors, (752), 490 states have call predecessors, (752), 485 states have call successors, (752) [2022-04-06 19:05:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 5545 transitions. [2022-04-06 19:05:04,543 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 5545 transitions. Word has length 60 [2022-04-06 19:05:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:05:04,543 INFO L478 AbstractCegarLoop]: Abstraction has 3791 states and 5545 transitions. [2022-04-06 19:05:04,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:05:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 5545 transitions. [2022-04-06 19:05:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:05:04,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:05:04,544 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:05:04,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 19:05:04,544 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:05:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:05:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -449310488, now seen corresponding path program 1 times [2022-04-06 19:05:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681340772] [2022-04-06 19:05:04,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:05:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -449310488, now seen corresponding path program 2 times [2022-04-06 19:05:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:05:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821069477] [2022-04-06 19:05:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:05:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:05:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:05:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:05:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:05:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:05:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:05:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 19:05:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:05,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:05:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:05:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821069477] [2022-04-06 19:05:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821069477] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:05:05,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:05:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681340772] [2022-04-06 19:05:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681340772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:05,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:05:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233611012] [2022-04-06 19:05:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:05:05,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:05:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:05:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:05:05,031 INFO L87 Difference]: Start difference. First operand 3791 states and 5545 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:05:10,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:14,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:05:17,594 INFO L93 Difference]: Finished difference Result 4508 states and 6795 transitions. [2022-04-06 19:05:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:05:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 59 [2022-04-06 19:05:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:05:17,605 INFO L225 Difference]: With dead ends: 4508 [2022-04-06 19:05:17,606 INFO L226 Difference]: Without dead ends: 4486 [2022-04-06 19:05:17,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:05:17,607 INFO L913 BasicCegarLoop]: 717 mSDtfsCounter, 2479 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 4735 mSolverCounterSat, 1134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 5871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 4735 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:05:17,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2518 Valid, 1882 Invalid, 5871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 4735 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-04-06 19:05:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2022-04-06 19:05:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3784. [2022-04-06 19:05:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 2985 states have (on average 1.436180904522613) internal successors, (4287), 3054 states have internal predecessors, (4287), 499 states have call successors, (499), 259 states have call predecessors, (499), 299 states have return successors, (750), 488 states have call predecessors, (750), 483 states have call successors, (750) [2022-04-06 19:05:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5536 transitions. [2022-04-06 19:05:18,305 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5536 transitions. Word has length 59 [2022-04-06 19:05:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:05:18,305 INFO L478 AbstractCegarLoop]: Abstraction has 3784 states and 5536 transitions. [2022-04-06 19:05:18,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:05:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5536 transitions. [2022-04-06 19:05:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:05:18,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:05:18,306 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:05:18,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 19:05:18,307 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:05:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:05:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1356964271, now seen corresponding path program 1 times [2022-04-06 19:05:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:18,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393283896] [2022-04-06 19:05:18,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:05:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1356964271, now seen corresponding path program 2 times [2022-04-06 19:05:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:05:18,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826207701] [2022-04-06 19:05:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:05:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:05:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:05:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:05:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:05:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:05:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:05:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 19:05:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:05:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:05:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826207701] [2022-04-06 19:05:18,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826207701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:18,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:18,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:05:18,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:05:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393283896] [2022-04-06 19:05:18,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393283896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:18,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:18,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:05:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493526283] [2022-04-06 19:05:18,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:05:18,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:05:18,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:05:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:05:18,687 INFO L87 Difference]: Start difference. First operand 3784 states and 5536 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (13), 10 states have call predecessors, (13), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:05:24,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:05:31,532 INFO L93 Difference]: Finished difference Result 12302 states and 18979 transitions. [2022-04-06 19:05:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:05:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (13), 10 states have call predecessors, (13), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2022-04-06 19:05:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:05:31,598 INFO L225 Difference]: With dead ends: 12302 [2022-04-06 19:05:31,598 INFO L226 Difference]: Without dead ends: 8762 [2022-04-06 19:05:31,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:05:31,612 INFO L913 BasicCegarLoop]: 921 mSDtfsCounter, 3619 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 3708 mSolverCounterSat, 1614 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3678 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 5323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1614 IncrementalHoareTripleChecker+Valid, 3708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:05:31,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3678 Valid, 1898 Invalid, 5323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1614 Valid, 3708 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-04-06 19:05:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8762 states. [2022-04-06 19:05:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8762 to 7553. [2022-04-06 19:05:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7553 states, 5959 states have (on average 1.4463836214129888) internal successors, (8619), 6145 states have internal predecessors, (8619), 1012 states have call successors, (1012), 479 states have call predecessors, (1012), 581 states have return successors, (1808), 964 states have call predecessors, (1808), 999 states have call successors, (1808) [2022-04-06 19:05:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7553 states to 7553 states and 11439 transitions. [2022-04-06 19:05:33,123 INFO L78 Accepts]: Start accepts. Automaton has 7553 states and 11439 transitions. Word has length 63 [2022-04-06 19:05:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:05:33,123 INFO L478 AbstractCegarLoop]: Abstraction has 7553 states and 11439 transitions. [2022-04-06 19:05:33,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (13), 10 states have call predecessors, (13), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:05:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7553 states and 11439 transitions. [2022-04-06 19:05:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:05:33,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:05:33,124 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:05:33,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 19:05:33,125 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:05:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:05:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -858477288, now seen corresponding path program 1 times [2022-04-06 19:05:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182975320] [2022-04-06 19:05:33,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:05:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -858477288, now seen corresponding path program 2 times [2022-04-06 19:05:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:05:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362277434] [2022-04-06 19:05:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:05:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:05:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:05:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:05:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:05:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:05:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:05:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:05:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:05:33,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:05:33,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362277434] [2022-04-06 19:05:33,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362277434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:33,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:33,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:05:33,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:05:33,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182975320] [2022-04-06 19:05:33,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182975320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:33,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:33,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:05:33,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912258509] [2022-04-06 19:05:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:05:33,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:05:33,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:05:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:05:33,598 INFO L87 Difference]: Start difference. First operand 7553 states and 11439 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:05:38,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:40,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:44,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:05:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:05:48,902 INFO L93 Difference]: Finished difference Result 15329 states and 23754 transitions. [2022-04-06 19:05:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:05:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2022-04-06 19:05:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:05:48,927 INFO L225 Difference]: With dead ends: 15329 [2022-04-06 19:05:48,927 INFO L226 Difference]: Without dead ends: 8851 [2022-04-06 19:05:48,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:05:48,950 INFO L913 BasicCegarLoop]: 709 mSDtfsCounter, 1463 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 3193 mSolverCounterSat, 656 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 3851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 3193 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:05:48,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1290 Invalid, 3851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 3193 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2022-04-06 19:05:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8851 states. [2022-04-06 19:05:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8851 to 7693. [2022-04-06 19:05:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 6099 states have (on average 1.4341695359895066) internal successors, (8747), 6285 states have internal predecessors, (8747), 1012 states have call successors, (1012), 479 states have call predecessors, (1012), 581 states have return successors, (1808), 964 states have call predecessors, (1808), 999 states have call successors, (1808) [2022-04-06 19:05:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 11567 transitions. [2022-04-06 19:05:50,667 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 11567 transitions. Word has length 61 [2022-04-06 19:05:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:05:50,667 INFO L478 AbstractCegarLoop]: Abstraction has 7693 states and 11567 transitions. [2022-04-06 19:05:50,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:05:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 11567 transitions. [2022-04-06 19:05:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 19:05:50,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:05:50,669 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] [2022-04-06 19:05:50,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 19:05:50,669 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:05:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:05:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1733980064, now seen corresponding path program 1 times [2022-04-06 19:05:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851295951] [2022-04-06 19:05:50,670 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:05:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1733980064, now seen corresponding path program 2 times [2022-04-06 19:05:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:05:50,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217240118] [2022-04-06 19:05:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:05:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:05:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:05:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:50,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:05:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:50,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:05:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:05:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:05:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:05:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:05:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 19:05:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:05:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:05:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:05:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217240118] [2022-04-06 19:05:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217240118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:51,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:51,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:05:51,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:05:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851295951] [2022-04-06 19:05:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851295951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:05:51,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:05:51,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:05:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93902710] [2022-04-06 19:05:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:05:51,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:05:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:05:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:05:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:05:51,156 INFO L87 Difference]: Start difference. First operand 7693 states and 11567 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:05:58,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:06:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:06:03,708 INFO L93 Difference]: Finished difference Result 8779 states and 13521 transitions. [2022-04-06 19:06:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:06:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 64 [2022-04-06 19:06:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:06:03,729 INFO L225 Difference]: With dead ends: 8779 [2022-04-06 19:06:03,729 INFO L226 Difference]: Without dead ends: 8763 [2022-04-06 19:06:03,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:06:03,732 INFO L913 BasicCegarLoop]: 720 mSDtfsCounter, 1564 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 686 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 5942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:06:03,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 1784 Invalid, 5942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 5255 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-04-06 19:06:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8763 states. [2022-04-06 19:06:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8763 to 7699. [2022-04-06 19:06:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 6102 states have (on average 1.4339560799737792) internal successors, (8750), 6291 states have internal predecessors, (8750), 1012 states have call successors, (1012), 479 states have call predecessors, (1012), 584 states have return successors, (1830), 964 states have call predecessors, (1830), 999 states have call successors, (1830) [2022-04-06 19:06:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11592 transitions. [2022-04-06 19:06:05,371 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11592 transitions. Word has length 64 [2022-04-06 19:06:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:06:05,371 INFO L478 AbstractCegarLoop]: Abstraction has 7699 states and 11592 transitions. [2022-04-06 19:06:05,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:06:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11592 transitions. [2022-04-06 19:06:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:06:05,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:06:05,373 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:06:05,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 19:06:05,374 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:06:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:06:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 326599203, now seen corresponding path program 1 times [2022-04-06 19:06:05,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713703809] [2022-04-06 19:06:05,374 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:06:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 326599203, now seen corresponding path program 2 times [2022-04-06 19:06:05,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:06:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278520356] [2022-04-06 19:06:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:06:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:06:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:06:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:06:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:06:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:06:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:06:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 19:06:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 19:06:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 19:06:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:06:05,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:06:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278520356] [2022-04-06 19:06:05,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278520356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:05,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:05,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:05,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:06:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713703809] [2022-04-06 19:06:05,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713703809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:05,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:05,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272203876] [2022-04-06 19:06:05,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:06:05,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:06:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:06:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:06:05,864 INFO L87 Difference]: Start difference. First operand 7699 states and 11592 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:06:12,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:06:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:06:17,690 INFO L93 Difference]: Finished difference Result 16424 states and 25036 transitions. [2022-04-06 19:06:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:06:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-04-06 19:06:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:06:17,714 INFO L225 Difference]: With dead ends: 16424 [2022-04-06 19:06:17,714 INFO L226 Difference]: Without dead ends: 8753 [2022-04-06 19:06:17,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:06:17,740 INFO L913 BasicCegarLoop]: 715 mSDtfsCounter, 2056 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 4667 mSolverCounterSat, 968 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 5636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 4667 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:06:17,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 1833 Invalid, 5636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 4667 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2022-04-06 19:06:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2022-04-06 19:06:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 7699. [2022-04-06 19:06:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 6102 states have (on average 1.4337921992789249) internal successors, (8749), 6291 states have internal predecessors, (8749), 1012 states have call successors, (1012), 479 states have call predecessors, (1012), 584 states have return successors, (1830), 964 states have call predecessors, (1830), 999 states have call successors, (1830) [2022-04-06 19:06:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11591 transitions. [2022-04-06 19:06:19,408 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11591 transitions. Word has length 65 [2022-04-06 19:06:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:06:19,409 INFO L478 AbstractCegarLoop]: Abstraction has 7699 states and 11591 transitions. [2022-04-06 19:06:19,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:06:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11591 transitions. [2022-04-06 19:06:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:06:19,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:06:19,410 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:06:19,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 19:06:19,410 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:06:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:06:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -175683046, now seen corresponding path program 1 times [2022-04-06 19:06:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:19,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932730906] [2022-04-06 19:06:19,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:06:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -175683046, now seen corresponding path program 2 times [2022-04-06 19:06:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:06:19,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629012148] [2022-04-06 19:06:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:06:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:06:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:06:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:06:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:06:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:06:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:06:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:06:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 19:06:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 19:06:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:06:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:06:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629012148] [2022-04-06 19:06:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629012148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:19,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:19,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:06:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [932730906] [2022-04-06 19:06:19,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [932730906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:19,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:19,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717155172] [2022-04-06 19:06:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:06:19,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:06:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:06:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:06:19,887 INFO L87 Difference]: Start difference. First operand 7699 states and 11591 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:06:26,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:06:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:06:31,549 INFO L93 Difference]: Finished difference Result 8771 states and 13494 transitions. [2022-04-06 19:06:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:06:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2022-04-06 19:06:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:06:31,571 INFO L225 Difference]: With dead ends: 8771 [2022-04-06 19:06:31,571 INFO L226 Difference]: Without dead ends: 8751 [2022-04-06 19:06:31,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:06:31,575 INFO L913 BasicCegarLoop]: 727 mSDtfsCounter, 2056 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 4753 mSolverCounterSat, 972 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 5726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 4753 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:06:31,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2094 Valid, 1912 Invalid, 5726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 4753 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-04-06 19:06:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2022-04-06 19:06:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 7697. [2022-04-06 19:06:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 6101 states have (on average 1.4336993935420423) internal successors, (8747), 6290 states have internal predecessors, (8747), 1011 states have call successors, (1011), 479 states have call predecessors, (1011), 584 states have return successors, (1829), 963 states have call predecessors, (1829), 998 states have call successors, (1829) [2022-04-06 19:06:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11587 transitions. [2022-04-06 19:06:33,300 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11587 transitions. Word has length 69 [2022-04-06 19:06:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:06:33,301 INFO L478 AbstractCegarLoop]: Abstraction has 7697 states and 11587 transitions. [2022-04-06 19:06:33,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:06:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11587 transitions. [2022-04-06 19:06:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:06:33,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:06:33,302 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:06:33,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 19:06:33,302 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:06:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:06:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2112328753, now seen corresponding path program 1 times [2022-04-06 19:06:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:33,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436978785] [2022-04-06 19:06:33,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:06:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2112328753, now seen corresponding path program 2 times [2022-04-06 19:06:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:06:33,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574956962] [2022-04-06 19:06:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:06:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:06:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:06:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:06:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:06:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:06:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:06:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:06:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:06:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 19:06:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:06:33,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:06:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574956962] [2022-04-06 19:06:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574956962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:33,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:33,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:06:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436978785] [2022-04-06 19:06:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436978785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:33,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:06:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253194963] [2022-04-06 19:06:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:06:33,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:06:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:06:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:06:33,830 INFO L87 Difference]: Start difference. First operand 7697 states and 11587 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:06:41,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:06:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:06:46,208 INFO L93 Difference]: Finished difference Result 8766 states and 13487 transitions. [2022-04-06 19:06:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:06:46,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 71 [2022-04-06 19:06:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:06:46,231 INFO L225 Difference]: With dead ends: 8766 [2022-04-06 19:06:46,231 INFO L226 Difference]: Without dead ends: 8746 [2022-04-06 19:06:46,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:06:46,235 INFO L913 BasicCegarLoop]: 725 mSDtfsCounter, 1810 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 4624 mSolverCounterSat, 821 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 4624 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:06:46,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1848 Valid, 1807 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 4624 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-04-06 19:06:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8746 states. [2022-04-06 19:06:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8746 to 7692. [2022-04-06 19:06:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 6098 states have (on average 1.4337487700885536) internal successors, (8743), 6287 states have internal predecessors, (8743), 1010 states have call successors, (1010), 479 states have call predecessors, (1010), 583 states have return successors, (1827), 961 states have call predecessors, (1827), 997 states have call successors, (1827) [2022-04-06 19:06:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 11580 transitions. [2022-04-06 19:06:48,029 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 11580 transitions. Word has length 71 [2022-04-06 19:06:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:06:48,029 INFO L478 AbstractCegarLoop]: Abstraction has 7692 states and 11580 transitions. [2022-04-06 19:06:48,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:06:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 11580 transitions. [2022-04-06 19:06:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:06:48,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:06:48,031 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:06:48,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 19:06:48,031 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:06:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:06:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1256030660, now seen corresponding path program 1 times [2022-04-06 19:06:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906906902] [2022-04-06 19:06:48,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:06:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1256030660, now seen corresponding path program 2 times [2022-04-06 19:06:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:06:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887342563] [2022-04-06 19:06:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:06:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:06:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:06:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:06:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:06:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:06:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:06:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:06:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:06:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:06:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:06:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:06:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:06:48,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887342563] [2022-04-06 19:06:48,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887342563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:48,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:48,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:06:48,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:06:48,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906906902] [2022-04-06 19:06:48,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906906902] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:06:48,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:06:48,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:06:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574432926] [2022-04-06 19:06:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:06:48,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:06:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:06:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:06:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:06:48,503 INFO L87 Difference]: Start difference. First operand 7692 states and 11580 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 19:06:54,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:06:56,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:07:02,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:07:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:07:14,891 INFO L93 Difference]: Finished difference Result 14684 states and 22637 transitions. [2022-04-06 19:07:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:07:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2022-04-06 19:07:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:07:14,931 INFO L225 Difference]: With dead ends: 14684 [2022-04-06 19:07:14,932 INFO L226 Difference]: Without dead ends: 10346 [2022-04-06 19:07:14,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=566, Invalid=2404, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:07:14,947 INFO L913 BasicCegarLoop]: 1104 mSDtfsCounter, 3264 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 8786 mSolverCounterSat, 1771 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 10560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1771 IncrementalHoareTripleChecker+Valid, 8786 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:07:14,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3272 Valid, 2425 Invalid, 10560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1771 Valid, 8786 Invalid, 3 Unknown, 0 Unchecked, 20.9s Time] [2022-04-06 19:07:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10346 states. [2022-04-06 19:07:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10346 to 8302. [2022-04-06 19:07:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 6587 states have (on average 1.432974039775315) internal successors, (9439), 6782 states have internal predecessors, (9439), 1077 states have call successors, (1077), 521 states have call predecessors, (1077), 637 states have return successors, (1969), 1033 states have call predecessors, (1969), 1063 states have call successors, (1969) [2022-04-06 19:07:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12485 transitions. [2022-04-06 19:07:17,021 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12485 transitions. Word has length 72 [2022-04-06 19:07:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:07:17,021 INFO L478 AbstractCegarLoop]: Abstraction has 8302 states and 12485 transitions. [2022-04-06 19:07:17,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 19:07:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12485 transitions. [2022-04-06 19:07:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:07:17,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:07:17,023 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:07:17,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 19:07:17,023 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:07:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:07:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash -26354390, now seen corresponding path program 1 times [2022-04-06 19:07:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:17,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861972182] [2022-04-06 19:07:17,024 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:07:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash -26354390, now seen corresponding path program 2 times [2022-04-06 19:07:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:07:17,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805845472] [2022-04-06 19:07:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:07:17,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:07:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:07:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:07:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:07:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:07:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:07:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:07:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:07:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 19:07:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:07:17,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:07:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805845472] [2022-04-06 19:07:17,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805845472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:17,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:07:17,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:07:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861972182] [2022-04-06 19:07:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861972182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:17,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:07:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385618460] [2022-04-06 19:07:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:07:17,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:07:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:07:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:07:17,544 INFO L87 Difference]: Start difference. First operand 8302 states and 12485 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:07:26,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:07:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:07:31,734 INFO L93 Difference]: Finished difference Result 16776 states and 25819 transitions. [2022-04-06 19:07:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:07:31,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 73 [2022-04-06 19:07:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:07:31,761 INFO L225 Difference]: With dead ends: 16776 [2022-04-06 19:07:31,761 INFO L226 Difference]: Without dead ends: 9666 [2022-04-06 19:07:31,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:07:31,780 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 1982 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 855 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 4962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:07:31,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2016 Valid, 1620 Invalid, 4962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 4106 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2022-04-06 19:07:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2022-04-06 19:07:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8460. [2022-04-06 19:07:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 6719 states have (on average 1.4250632534603365) internal successors, (9575), 6926 states have internal predecessors, (9575), 1081 states have call successors, (1081), 521 states have call predecessors, (1081), 659 states have return successors, (2040), 1047 states have call predecessors, (2040), 1067 states have call successors, (2040) [2022-04-06 19:07:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 12696 transitions. [2022-04-06 19:07:33,952 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 12696 transitions. Word has length 73 [2022-04-06 19:07:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:07:33,952 INFO L478 AbstractCegarLoop]: Abstraction has 8460 states and 12696 transitions. [2022-04-06 19:07:33,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:07:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 12696 transitions. [2022-04-06 19:07:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:07:33,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:07:33,954 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:07:33,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 19:07:33,954 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:07:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:07:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 879838427, now seen corresponding path program 1 times [2022-04-06 19:07:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604941782] [2022-04-06 19:07:33,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:07:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 879838427, now seen corresponding path program 2 times [2022-04-06 19:07:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:07:33,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974379396] [2022-04-06 19:07:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:07:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:07:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:07:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:07:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:07:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:07:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:07:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:07:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:07:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:07:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:07:34,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974379396] [2022-04-06 19:07:34,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974379396] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:34,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:34,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:07:34,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:07:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604941782] [2022-04-06 19:07:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604941782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:34,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:34,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:07:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032338164] [2022-04-06 19:07:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:07:34,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:07:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:07:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:07:34,380 INFO L87 Difference]: Start difference. First operand 8460 states and 12696 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:07:41,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:07:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:07:46,853 INFO L93 Difference]: Finished difference Result 17060 states and 26210 transitions. [2022-04-06 19:07:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:07:46,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-04-06 19:07:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:07:46,878 INFO L225 Difference]: With dead ends: 17060 [2022-04-06 19:07:46,879 INFO L226 Difference]: Without dead ends: 9792 [2022-04-06 19:07:46,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:07:46,897 INFO L913 BasicCegarLoop]: 696 mSDtfsCounter, 2126 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 880 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:07:46,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2162 Valid, 1320 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [880 Valid, 2911 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-04-06 19:07:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2022-04-06 19:07:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8520. [2022-04-06 19:07:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 6779 states have (on average 1.4213010768549934) internal successors, (9635), 6986 states have internal predecessors, (9635), 1081 states have call successors, (1081), 521 states have call predecessors, (1081), 659 states have return successors, (2040), 1047 states have call predecessors, (2040), 1067 states have call successors, (2040) [2022-04-06 19:07:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 12756 transitions. [2022-04-06 19:07:49,092 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 12756 transitions. Word has length 73 [2022-04-06 19:07:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:07:49,092 INFO L478 AbstractCegarLoop]: Abstraction has 8520 states and 12756 transitions. [2022-04-06 19:07:49,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:07:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 12756 transitions. [2022-04-06 19:07:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:07:49,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:07:49,094 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:07:49,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 19:07:49,094 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:07:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:07:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1359799553, now seen corresponding path program 1 times [2022-04-06 19:07:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421320711] [2022-04-06 19:07:49,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:07:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1359799553, now seen corresponding path program 2 times [2022-04-06 19:07:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:07:49,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173000476] [2022-04-06 19:07:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:07:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:07:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:07:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:07:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:07:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:07:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:07:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:07:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:07:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:07:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:07:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:07:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:07:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173000476] [2022-04-06 19:07:49,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173000476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:49,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:49,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:07:49,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:07:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421320711] [2022-04-06 19:07:49,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421320711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:07:49,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:07:49,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:07:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734600565] [2022-04-06 19:07:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:07:49,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:07:49,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:07:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:07:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:07:49,635 INFO L87 Difference]: Start difference. First operand 8520 states and 12756 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:07:56,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:08:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:08:02,247 INFO L93 Difference]: Finished difference Result 18004 states and 27633 transitions. [2022-04-06 19:08:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:08:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-04-06 19:08:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:08:02,282 INFO L225 Difference]: With dead ends: 18004 [2022-04-06 19:08:02,282 INFO L226 Difference]: Without dead ends: 9738 [2022-04-06 19:08:02,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:08:02,312 INFO L913 BasicCegarLoop]: 658 mSDtfsCounter, 2648 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 1133 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 4547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:08:02,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2698 Valid, 1395 Invalid, 4547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 3413 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2022-04-06 19:08:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9738 states. [2022-04-06 19:08:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9738 to 8539. [2022-04-06 19:08:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8539 states, 6798 states have (on average 1.4215945866431303) internal successors, (9664), 7005 states have internal predecessors, (9664), 1081 states have call successors, (1081), 521 states have call predecessors, (1081), 659 states have return successors, (2040), 1047 states have call predecessors, (2040), 1067 states have call successors, (2040) [2022-04-06 19:08:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8539 states to 8539 states and 12785 transitions. [2022-04-06 19:08:04,722 INFO L78 Accepts]: Start accepts. Automaton has 8539 states and 12785 transitions. Word has length 74 [2022-04-06 19:08:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:08:04,722 INFO L478 AbstractCegarLoop]: Abstraction has 8539 states and 12785 transitions. [2022-04-06 19:08:04,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:08:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8539 states and 12785 transitions. [2022-04-06 19:08:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:08:04,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:08:04,724 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:08:04,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 19:08:04,724 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:08:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:08:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 941023037, now seen corresponding path program 1 times [2022-04-06 19:08:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933414354] [2022-04-06 19:08:04,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:08:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 941023037, now seen corresponding path program 2 times [2022-04-06 19:08:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:08:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020276301] [2022-04-06 19:08:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:08:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:08:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:08:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:08:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:08:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:08:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:08:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:08:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:08:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:08:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:08:05,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:08:05,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020276301] [2022-04-06 19:08:05,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020276301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:05,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:05,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:08:05,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:08:05,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933414354] [2022-04-06 19:08:05,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933414354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:05,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:05,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:08:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215471782] [2022-04-06 19:08:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:08:05,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:08:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:08:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:08:05,239 INFO L87 Difference]: Start difference. First operand 8539 states and 12785 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 19:08:15,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:08:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:08:22,453 INFO L93 Difference]: Finished difference Result 14039 states and 21273 transitions. [2022-04-06 19:08:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:08:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2022-04-06 19:08:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:08:22,480 INFO L225 Difference]: With dead ends: 14039 [2022-04-06 19:08:22,480 INFO L226 Difference]: Without dead ends: 9512 [2022-04-06 19:08:22,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:08:22,495 INFO L913 BasicCegarLoop]: 672 mSDtfsCounter, 2605 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 1089 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 6514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:08:22,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2635 Valid, 1810 Invalid, 6514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 5424 Invalid, 1 Unknown, 0 Unchecked, 11.8s Time] [2022-04-06 19:08:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9512 states. [2022-04-06 19:08:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9512 to 7741. [2022-04-06 19:08:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 6166 states have (on average 1.4192345118391176) internal successors, (8751), 6361 states have internal predecessors, (8751), 978 states have call successors, (978), 475 states have call predecessors, (978), 596 states have return successors, (1667), 939 states have call predecessors, (1667), 964 states have call successors, (1667) [2022-04-06 19:08:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 11396 transitions. [2022-04-06 19:08:24,707 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 11396 transitions. Word has length 74 [2022-04-06 19:08:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:08:24,707 INFO L478 AbstractCegarLoop]: Abstraction has 7741 states and 11396 transitions. [2022-04-06 19:08:24,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 19:08:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 11396 transitions. [2022-04-06 19:08:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:08:24,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:08:24,709 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:08:24,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 19:08:24,709 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:08:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:08:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1087715839, now seen corresponding path program 1 times [2022-04-06 19:08:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465493848] [2022-04-06 19:08:24,710 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:08:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1087715839, now seen corresponding path program 2 times [2022-04-06 19:08:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:08:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168032630] [2022-04-06 19:08:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:08:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:08:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:24,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:08:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:08:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:08:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:08:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:08:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:08:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:08:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:08:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:08:25,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:08:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168032630] [2022-04-06 19:08:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168032630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:25,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:25,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:08:25,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:08:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465493848] [2022-04-06 19:08:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465493848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:25,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:25,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:08:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415752429] [2022-04-06 19:08:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:08:25,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:08:25,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:08:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:08:25,239 INFO L87 Difference]: Start difference. First operand 7741 states and 11396 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:08:33,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:08:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:08:45,608 INFO L93 Difference]: Finished difference Result 11936 states and 18074 transitions. [2022-04-06 19:08:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:08:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2022-04-06 19:08:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:08:45,637 INFO L225 Difference]: With dead ends: 11936 [2022-04-06 19:08:45,637 INFO L226 Difference]: Without dead ends: 11923 [2022-04-06 19:08:45,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:08:45,642 INFO L913 BasicCegarLoop]: 1150 mSDtfsCounter, 2232 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 6648 mSolverCounterSat, 994 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2279 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 7643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 6648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:08:45,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2279 Valid, 2241 Invalid, 7643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [994 Valid, 6648 Invalid, 1 Unknown, 0 Unchecked, 14.6s Time] [2022-04-06 19:08:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2022-04-06 19:08:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 8372. [2022-04-06 19:08:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8372 states, 6678 states have (on average 1.4225816112608565) internal successors, (9500), 6874 states have internal predecessors, (9500), 1047 states have call successors, (1047), 516 states have call predecessors, (1047), 646 states have return successors, (1781), 1017 states have call predecessors, (1781), 1033 states have call successors, (1781) [2022-04-06 19:08:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8372 states to 8372 states and 12328 transitions. [2022-04-06 19:08:48,253 INFO L78 Accepts]: Start accepts. Automaton has 8372 states and 12328 transitions. Word has length 74 [2022-04-06 19:08:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:08:48,253 INFO L478 AbstractCegarLoop]: Abstraction has 8372 states and 12328 transitions. [2022-04-06 19:08:48,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:08:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 8372 states and 12328 transitions. [2022-04-06 19:08:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:08:48,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:08:48,254 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:08:48,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 19:08:48,254 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:08:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:08:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash -189949733, now seen corresponding path program 1 times [2022-04-06 19:08:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:48,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163647155] [2022-04-06 19:08:48,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:08:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash -189949733, now seen corresponding path program 2 times [2022-04-06 19:08:48,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:08:48,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284966440] [2022-04-06 19:08:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:08:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:08:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:08:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:08:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:08:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:08:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:08:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:08:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:08:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:08:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:08:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:08:48,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:08:48,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284966440] [2022-04-06 19:08:48,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284966440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:48,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:48,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:08:48,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:08:48,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163647155] [2022-04-06 19:08:48,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163647155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:08:48,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:08:48,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:08:48,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527733958] [2022-04-06 19:08:48,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:08:48,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:08:48,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:08:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:08:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:08:48,751 INFO L87 Difference]: Start difference. First operand 8372 states and 12328 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:08:57,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:02,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:04,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:09:13,808 INFO L93 Difference]: Finished difference Result 10541 states and 15900 transitions. [2022-04-06 19:09:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:09:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-04-06 19:09:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:09:13,834 INFO L225 Difference]: With dead ends: 10541 [2022-04-06 19:09:13,834 INFO L226 Difference]: Without dead ends: 10537 [2022-04-06 19:09:13,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=542, Invalid=1810, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:09:13,839 INFO L913 BasicCegarLoop]: 1095 mSDtfsCounter, 3870 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 6939 mSolverCounterSat, 1853 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3912 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 8795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1853 IncrementalHoareTripleChecker+Valid, 6939 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:09:13,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3912 Valid, 2224 Invalid, 8795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1853 Valid, 6939 Invalid, 3 Unknown, 0 Unchecked, 18.0s Time] [2022-04-06 19:09:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10537 states. [2022-04-06 19:09:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10537 to 8374. [2022-04-06 19:09:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8374 states, 6680 states have (on average 1.4224550898203592) internal successors, (9502), 6876 states have internal predecessors, (9502), 1047 states have call successors, (1047), 516 states have call predecessors, (1047), 646 states have return successors, (1781), 1017 states have call predecessors, (1781), 1033 states have call successors, (1781) [2022-04-06 19:09:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 12330 transitions. [2022-04-06 19:09:16,638 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 12330 transitions. Word has length 75 [2022-04-06 19:09:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:09:16,638 INFO L478 AbstractCegarLoop]: Abstraction has 8374 states and 12330 transitions. [2022-04-06 19:09:16,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:09:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 12330 transitions. [2022-04-06 19:09:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:09:16,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:09:16,640 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:09:16,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 19:09:16,640 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:09:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:09:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash -189672903, now seen corresponding path program 1 times [2022-04-06 19:09:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:09:16,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115302270] [2022-04-06 19:09:16,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:09:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash -189672903, now seen corresponding path program 2 times [2022-04-06 19:09:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:09:16,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873689275] [2022-04-06 19:09:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:09:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:09:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:16,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:09:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:09:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:09:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:09:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:09:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:09:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:17,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:09:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:09:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:09:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:09:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873689275] [2022-04-06 19:09:17,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873689275] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:09:17,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:09:17,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:09:17,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:09:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115302270] [2022-04-06 19:09:17,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115302270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:09:17,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:09:17,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:09:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257608615] [2022-04-06 19:09:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:09:17,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:09:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:09:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:09:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:09:17,142 INFO L87 Difference]: Start difference. First operand 8374 states and 12330 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:09:27,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:09:34,771 INFO L93 Difference]: Finished difference Result 9494 states and 14341 transitions. [2022-04-06 19:09:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:09:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 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 75 [2022-04-06 19:09:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:09:34,790 INFO L225 Difference]: With dead ends: 9494 [2022-04-06 19:09:34,791 INFO L226 Difference]: Without dead ends: 9480 [2022-04-06 19:09:34,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:09:34,793 INFO L913 BasicCegarLoop]: 706 mSDtfsCounter, 2012 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 6850 mSolverCounterSat, 942 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 7793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 6850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:09:34,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2051 Valid, 2182 Invalid, 7793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 6850 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2022-04-06 19:09:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2022-04-06 19:09:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 8376. [2022-04-06 19:09:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8376 states, 6681 states have (on average 1.4223918575063612) internal successors, (9503), 6878 states have internal predecessors, (9503), 1047 states have call successors, (1047), 516 states have call predecessors, (1047), 647 states have return successors, (1797), 1017 states have call predecessors, (1797), 1033 states have call successors, (1797) [2022-04-06 19:09:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8376 states to 8376 states and 12347 transitions. [2022-04-06 19:09:37,589 INFO L78 Accepts]: Start accepts. Automaton has 8376 states and 12347 transitions. Word has length 75 [2022-04-06 19:09:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:09:37,589 INFO L478 AbstractCegarLoop]: Abstraction has 8376 states and 12347 transitions. [2022-04-06 19:09:37,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:09:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8376 states and 12347 transitions. [2022-04-06 19:09:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:09:37,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:09:37,591 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:09:37,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 19:09:37,591 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:09:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:09:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1279361975, now seen corresponding path program 1 times [2022-04-06 19:09:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:09:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599884202] [2022-04-06 19:09:37,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:09:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1279361975, now seen corresponding path program 2 times [2022-04-06 19:09:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:09:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451469686] [2022-04-06 19:09:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:09:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:09:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:09:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:09:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:09:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:09:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:09:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:09:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:09:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 19:09:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:09:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:09:38,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:09:38,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451469686] [2022-04-06 19:09:38,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451469686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:09:38,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:09:38,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:09:38,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:09:38,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599884202] [2022-04-06 19:09:38,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599884202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:09:38,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:09:38,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:09:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724332672] [2022-04-06 19:09:38,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:09:38,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:09:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:09:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:09:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:09:38,049 INFO L87 Difference]: Start difference. First operand 8376 states and 12347 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:09:45,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:50,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:09:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:09:58,632 INFO L93 Difference]: Finished difference Result 9487 states and 14285 transitions. [2022-04-06 19:09:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:09:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 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 75 [2022-04-06 19:09:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:09:58,651 INFO L225 Difference]: With dead ends: 9487 [2022-04-06 19:09:58,651 INFO L226 Difference]: Without dead ends: 9434 [2022-04-06 19:09:58,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:09:58,653 INFO L913 BasicCegarLoop]: 697 mSDtfsCounter, 2008 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 6752 mSolverCounterSat, 891 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 7645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 6752 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:09:58,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 2232 Invalid, 7645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 6752 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2022-04-06 19:09:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2022-04-06 19:10:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 8339. [2022-04-06 19:10:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8339 states, 6649 states have (on average 1.4227703414047226) internal successors, (9460), 6846 states have internal predecessors, (9460), 1044 states have call successors, (1044), 514 states have call predecessors, (1044), 645 states have return successors, (1793), 1014 states have call predecessors, (1793), 1030 states have call successors, (1793) [2022-04-06 19:10:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 12297 transitions. [2022-04-06 19:10:01,464 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 12297 transitions. Word has length 75 [2022-04-06 19:10:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:10:01,464 INFO L478 AbstractCegarLoop]: Abstraction has 8339 states and 12297 transitions. [2022-04-06 19:10:01,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:10:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 12297 transitions. [2022-04-06 19:10:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 19:10:01,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:10:01,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:10:01,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 19:10:01,466 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:10:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:10:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1573546191, now seen corresponding path program 1 times [2022-04-06 19:10:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953795660] [2022-04-06 19:10:01,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:10:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1573546191, now seen corresponding path program 2 times [2022-04-06 19:10:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:10:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280802997] [2022-04-06 19:10:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:10:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:10:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:10:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:10:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:10:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:10:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:10:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:10:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:10:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 19:10:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 19:10:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 19:10:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:10:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:10:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280802997] [2022-04-06 19:10:01,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280802997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:01,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:01,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:10:01,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:10:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953795660] [2022-04-06 19:10:01,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953795660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:01,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:01,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:10:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129075451] [2022-04-06 19:10:01,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:10:01,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:10:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:10:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:10:01,953 INFO L87 Difference]: Start difference. First operand 8339 states and 12297 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 19:10:07,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:10:12,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:10:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:10:23,479 INFO L93 Difference]: Finished difference Result 13326 states and 19927 transitions. [2022-04-06 19:10:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:10:23,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-04-06 19:10:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:10:23,504 INFO L225 Difference]: With dead ends: 13326 [2022-04-06 19:10:23,504 INFO L226 Difference]: Without dead ends: 9304 [2022-04-06 19:10:23,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:10:23,516 INFO L913 BasicCegarLoop]: 1113 mSDtfsCounter, 2012 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 5470 mSolverCounterSat, 862 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2065 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 6334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 862 IncrementalHoareTripleChecker+Valid, 5470 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:10:23,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2065 Valid, 1946 Invalid, 6334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [862 Valid, 5470 Invalid, 2 Unknown, 0 Unchecked, 15.9s Time] [2022-04-06 19:10:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2022-04-06 19:10:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 7692. [2022-04-06 19:10:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 6124 states have (on average 1.4188438928804703) internal successors, (8689), 6316 states have internal predecessors, (8689), 971 states have call successors, (971), 473 states have call predecessors, (971), 596 states have return successors, (1570), 934 states have call predecessors, (1570), 949 states have call successors, (1570) [2022-04-06 19:10:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 11230 transitions. [2022-04-06 19:10:26,304 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 11230 transitions. Word has length 78 [2022-04-06 19:10:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:10:26,304 INFO L478 AbstractCegarLoop]: Abstraction has 7692 states and 11230 transitions. [2022-04-06 19:10:26,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 19:10:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 11230 transitions. [2022-04-06 19:10:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 19:10:26,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:10:26,306 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] [2022-04-06 19:10:26,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 19:10:26,306 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:10:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:10:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1631640044, now seen corresponding path program 1 times [2022-04-06 19:10:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:26,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829308193] [2022-04-06 19:10:26,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:10:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1631640044, now seen corresponding path program 2 times [2022-04-06 19:10:26,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:10:26,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540173929] [2022-04-06 19:10:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:10:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:10:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:10:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:10:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:10:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:10:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:10:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:10:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:10:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:10:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:10:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540173929] [2022-04-06 19:10:26,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540173929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:26,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:26,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:10:26,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:10:26,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829308193] [2022-04-06 19:10:26,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829308193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:26,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:26,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:10:26,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099663394] [2022-04-06 19:10:26,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:10:26,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:10:26,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:10:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:10:26,662 INFO L87 Difference]: Start difference. First operand 7692 states and 11230 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:10:34,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:10:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:10:41,136 INFO L93 Difference]: Finished difference Result 15426 states and 23011 transitions. [2022-04-06 19:10:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:10:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2022-04-06 19:10:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:10:41,157 INFO L225 Difference]: With dead ends: 15426 [2022-04-06 19:10:41,157 INFO L226 Difference]: Without dead ends: 8902 [2022-04-06 19:10:41,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:10:41,171 INFO L913 BasicCegarLoop]: 644 mSDtfsCounter, 1428 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 632 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 3619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:10:41,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 1168 Invalid, 3619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2986 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-04-06 19:10:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2022-04-06 19:10:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 7716. [2022-04-06 19:10:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7716 states, 6148 states have (on average 1.4172088484059857) internal successors, (8713), 6340 states have internal predecessors, (8713), 971 states have call successors, (971), 473 states have call predecessors, (971), 596 states have return successors, (1570), 934 states have call predecessors, (1570), 949 states have call successors, (1570) [2022-04-06 19:10:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 11254 transitions. [2022-04-06 19:10:44,037 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 11254 transitions. Word has length 76 [2022-04-06 19:10:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:10:44,037 INFO L478 AbstractCegarLoop]: Abstraction has 7716 states and 11254 transitions. [2022-04-06 19:10:44,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 19:10:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 11254 transitions. [2022-04-06 19:10:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:10:44,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:10:44,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:10:44,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 19:10:44,039 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:10:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:10:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1608608426, now seen corresponding path program 1 times [2022-04-06 19:10:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:44,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518744960] [2022-04-06 19:10:44,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:10:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1608608426, now seen corresponding path program 2 times [2022-04-06 19:10:44,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:10:44,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753341894] [2022-04-06 19:10:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:10:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:10:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:10:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:10:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:10:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:10:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:10:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:10:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:10:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:10:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 19:10:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:10:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:10:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:10:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753341894] [2022-04-06 19:10:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753341894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:44,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:44,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:10:44,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:10:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518744960] [2022-04-06 19:10:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518744960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:10:44,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:10:44,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:10:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467211418] [2022-04-06 19:10:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:10:44,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:10:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:10:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:10:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:10:44,466 INFO L87 Difference]: Start difference. First operand 7716 states and 11254 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:10:52,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:10:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:10:59,512 INFO L93 Difference]: Finished difference Result 15276 states and 22677 transitions. [2022-04-06 19:10:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:10:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2022-04-06 19:10:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:10:59,531 INFO L225 Difference]: With dead ends: 15276 [2022-04-06 19:10:59,532 INFO L226 Difference]: Without dead ends: 8728 [2022-04-06 19:10:59,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:10:59,545 INFO L913 BasicCegarLoop]: 664 mSDtfsCounter, 1570 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 703 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:10:59,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 1193 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2870 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-04-06 19:10:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2022-04-06 19:11:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7668. [2022-04-06 19:11:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7668 states, 6100 states have (on average 1.4165573770491804) internal successors, (8641), 6308 states have internal predecessors, (8641), 971 states have call successors, (971), 473 states have call predecessors, (971), 596 states have return successors, (1570), 918 states have call predecessors, (1570), 949 states have call successors, (1570) [2022-04-06 19:11:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7668 states to 7668 states and 11182 transitions. [2022-04-06 19:11:02,477 INFO L78 Accepts]: Start accepts. Automaton has 7668 states and 11182 transitions. Word has length 79 [2022-04-06 19:11:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:11:02,478 INFO L478 AbstractCegarLoop]: Abstraction has 7668 states and 11182 transitions. [2022-04-06 19:11:02,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:11:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 7668 states and 11182 transitions. [2022-04-06 19:11:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 19:11:02,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:11:02,479 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] [2022-04-06 19:11:02,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 19:11:02,480 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:11:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:11:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -697853230, now seen corresponding path program 1 times [2022-04-06 19:11:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:02,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1895930005] [2022-04-06 19:11:02,480 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:11:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -697853230, now seen corresponding path program 2 times [2022-04-06 19:11:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:11:02,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155619362] [2022-04-06 19:11:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:11:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:11:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:11:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:11:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:11:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:11:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:11:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:11:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:11:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:11:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:11:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:11:02,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155619362] [2022-04-06 19:11:02,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155619362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:02,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:02,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:02,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:11:02,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1895930005] [2022-04-06 19:11:02,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1895930005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:02,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:02,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313279678] [2022-04-06 19:11:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:11:02,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:11:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:02,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:11:02,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:11:02,975 INFO L87 Difference]: Start difference. First operand 7668 states and 11182 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:11:08,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:11:14,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:11:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:11:22,138 INFO L93 Difference]: Finished difference Result 12038 states and 17930 transitions. [2022-04-06 19:11:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:11:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-04-06 19:11:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:11:22,160 INFO L225 Difference]: With dead ends: 12038 [2022-04-06 19:11:22,160 INFO L226 Difference]: Without dead ends: 8914 [2022-04-06 19:11:22,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:11:22,172 INFO L913 BasicCegarLoop]: 648 mSDtfsCounter, 1447 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 3850 mSolverCounterSat, 639 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 4491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 3850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:11:22,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1334 Invalid, 4491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 3850 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2022-04-06 19:11:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8914 states. [2022-04-06 19:11:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8914 to 7788. [2022-04-06 19:11:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7788 states, 6220 states have (on average 1.4213826366559486) internal successors, (8841), 6428 states have internal predecessors, (8841), 971 states have call successors, (971), 473 states have call predecessors, (971), 596 states have return successors, (1570), 918 states have call predecessors, (1570), 949 states have call successors, (1570) [2022-04-06 19:11:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7788 states to 7788 states and 11382 transitions. [2022-04-06 19:11:25,430 INFO L78 Accepts]: Start accepts. Automaton has 7788 states and 11382 transitions. Word has length 80 [2022-04-06 19:11:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:11:25,430 INFO L478 AbstractCegarLoop]: Abstraction has 7788 states and 11382 transitions. [2022-04-06 19:11:25,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:11:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7788 states and 11382 transitions. [2022-04-06 19:11:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 19:11:25,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:11:25,432 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] [2022-04-06 19:11:25,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 19:11:25,432 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:11:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:11:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash -192162812, now seen corresponding path program 1 times [2022-04-06 19:11:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813361127] [2022-04-06 19:11:25,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:11:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash -192162812, now seen corresponding path program 2 times [2022-04-06 19:11:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:11:25,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084159928] [2022-04-06 19:11:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:11:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:11:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:11:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:11:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:11:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:11:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:11:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:11:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 19:11:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:11:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 19:11:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:11:25,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:11:25,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084159928] [2022-04-06 19:11:25,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084159928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:25,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:25,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:25,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:11:25,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813361127] [2022-04-06 19:11:25,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813361127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:25,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:25,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582067099] [2022-04-06 19:11:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:11:25,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:11:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:11:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:11:25,844 INFO L87 Difference]: Start difference. First operand 7788 states and 11382 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (14), 9 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 19:11:33,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:11:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:11:43,411 INFO L93 Difference]: Finished difference Result 10871 states and 15958 transitions. [2022-04-06 19:11:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:11:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (14), 9 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-04-06 19:11:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:11:43,426 INFO L225 Difference]: With dead ends: 10871 [2022-04-06 19:11:43,426 INFO L226 Difference]: Without dead ends: 6649 [2022-04-06 19:11:43,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:11:43,436 INFO L913 BasicCegarLoop]: 976 mSDtfsCounter, 4580 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 4136 mSolverCounterSat, 1858 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4630 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 5995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 4136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:11:43,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4630 Valid, 1776 Invalid, 5995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 4136 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2022-04-06 19:11:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6649 states. [2022-04-06 19:11:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6649 to 5650. [2022-04-06 19:11:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 4550 states have (on average 1.4112087912087912) internal successors, (6421), 4671 states have internal predecessors, (6421), 676 states have call successors, (676), 351 states have call predecessors, (676), 423 states have return successors, (914), 649 states have call predecessors, (914), 658 states have call successors, (914) [2022-04-06 19:11:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 8011 transitions. [2022-04-06 19:11:45,800 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 8011 transitions. Word has length 84 [2022-04-06 19:11:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:11:45,801 INFO L478 AbstractCegarLoop]: Abstraction has 5650 states and 8011 transitions. [2022-04-06 19:11:45,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (14), 9 states have call predecessors, (14), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 19:11:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 8011 transitions. [2022-04-06 19:11:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:11:45,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:11:45,802 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:11:45,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 19:11:45,802 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:11:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:11:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1582799931, now seen corresponding path program 1 times [2022-04-06 19:11:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398374141] [2022-04-06 19:11:45,803 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:11:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1582799931, now seen corresponding path program 2 times [2022-04-06 19:11:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:11:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728488320] [2022-04-06 19:11:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:11:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:11:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:11:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:11:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:11:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:11:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:11:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:11:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:11:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:11:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:11:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:11:46,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:11:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728488320] [2022-04-06 19:11:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728488320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:46,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:46,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:46,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:11:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398374141] [2022-04-06 19:11:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398374141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:11:46,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:11:46,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:11:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891141341] [2022-04-06 19:11:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:11:46,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:11:46,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:11:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:11:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:11:46,245 INFO L87 Difference]: Start difference. First operand 5650 states and 8011 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:11:53,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:11:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:11:59,887 INFO L93 Difference]: Finished difference Result 9634 states and 13887 transitions. [2022-04-06 19:11:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:11:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-04-06 19:11:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:11:59,903 INFO L225 Difference]: With dead ends: 9634 [2022-04-06 19:11:59,903 INFO L226 Difference]: Without dead ends: 6637 [2022-04-06 19:11:59,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:11:59,912 INFO L913 BasicCegarLoop]: 667 mSDtfsCounter, 1943 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 851 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:11:59,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1980 Valid, 1350 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 2590 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-04-06 19:11:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2022-04-06 19:12:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 5566. [2022-04-06 19:12:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5566 states, 4466 states have (on average 1.415360501567398) internal successors, (6321), 4587 states have internal predecessors, (6321), 676 states have call successors, (676), 351 states have call predecessors, (676), 423 states have return successors, (914), 649 states have call predecessors, (914), 658 states have call successors, (914) [2022-04-06 19:12:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 7911 transitions. [2022-04-06 19:12:02,327 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 7911 transitions. Word has length 81 [2022-04-06 19:12:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:12:02,328 INFO L478 AbstractCegarLoop]: Abstraction has 5566 states and 7911 transitions. [2022-04-06 19:12:02,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:12:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 7911 transitions. [2022-04-06 19:12:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:12:02,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:12:02,329 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:12:02,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 19:12:02,329 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:12:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:12:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1178730404, now seen corresponding path program 1 times [2022-04-06 19:12:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254007493] [2022-04-06 19:12:02,330 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:12:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1178730404, now seen corresponding path program 2 times [2022-04-06 19:12:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:12:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036962026] [2022-04-06 19:12:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:12:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:12:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:12:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:12:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:12:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:12:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:12:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:12:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 19:12:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:12:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:12:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:12:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036962026] [2022-04-06 19:12:02,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036962026] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:02,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:02,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:12:02,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:12:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254007493] [2022-04-06 19:12:02,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254007493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:02,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:02,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:12:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941312095] [2022-04-06 19:12:02,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:12:02,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:12:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:12:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:12:02,974 INFO L87 Difference]: Start difference. First operand 5566 states and 7911 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:12:12,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:12:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:12:19,102 INFO L93 Difference]: Finished difference Result 6492 states and 9438 transitions. [2022-04-06 19:12:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:12:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (10), 10 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 81 [2022-04-06 19:12:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:12:19,115 INFO L225 Difference]: With dead ends: 6492 [2022-04-06 19:12:19,115 INFO L226 Difference]: Without dead ends: 6472 [2022-04-06 19:12:19,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:12:19,117 INFO L913 BasicCegarLoop]: 662 mSDtfsCounter, 2061 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 925 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 6926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:12:19,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2100 Valid, 2086 Invalid, 6926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 6000 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2022-04-06 19:12:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2022-04-06 19:12:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 5562. [2022-04-06 19:12:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 4463 states have (on average 1.4154156397042348) internal successors, (6317), 4584 states have internal predecessors, (6317), 675 states have call successors, (675), 351 states have call predecessors, (675), 423 states have return successors, (913), 648 states have call predecessors, (913), 657 states have call successors, (913) [2022-04-06 19:12:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 7905 transitions. [2022-04-06 19:12:21,523 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 7905 transitions. Word has length 81 [2022-04-06 19:12:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:12:21,523 INFO L478 AbstractCegarLoop]: Abstraction has 5562 states and 7905 transitions. [2022-04-06 19:12:21,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:12:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 7905 transitions. [2022-04-06 19:12:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 19:12:21,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:12:21,524 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] [2022-04-06 19:12:21,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 19:12:21,524 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:12:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:12:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1957637781, now seen corresponding path program 1 times [2022-04-06 19:12:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455912136] [2022-04-06 19:12:21,525 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:12:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1957637781, now seen corresponding path program 2 times [2022-04-06 19:12:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:12:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788885325] [2022-04-06 19:12:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:12:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:12:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:12:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:12:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:12:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:12:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:12:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:12:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:21,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:12:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 19:12:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:12:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:12:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788885325] [2022-04-06 19:12:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788885325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:22,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:12:22,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:12:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455912136] [2022-04-06 19:12:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455912136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:22,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:12:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615965759] [2022-04-06 19:12:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:12:22,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:12:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:12:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:12:22,042 INFO L87 Difference]: Start difference. First operand 5562 states and 7905 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:12:31,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:12:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:12:37,819 INFO L93 Difference]: Finished difference Result 6677 states and 9710 transitions. [2022-04-06 19:12:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:12:37,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-04-06 19:12:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:12:37,833 INFO L225 Difference]: With dead ends: 6677 [2022-04-06 19:12:37,833 INFO L226 Difference]: Without dead ends: 6661 [2022-04-06 19:12:37,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:12:37,835 INFO L913 BasicCegarLoop]: 663 mSDtfsCounter, 2160 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 4753 mSolverCounterSat, 944 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2198 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 5698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 4753 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:12:37,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2198 Valid, 1806 Invalid, 5698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 4753 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2022-04-06 19:12:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2022-04-06 19:12:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 5585. [2022-04-06 19:12:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5585 states, 4484 states have (on average 1.4139161462979482) internal successors, (6340), 4606 states have internal predecessors, (6340), 677 states have call successors, (677), 351 states have call predecessors, (677), 423 states have return successors, (915), 649 states have call predecessors, (915), 659 states have call successors, (915) [2022-04-06 19:12:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5585 states to 5585 states and 7932 transitions. [2022-04-06 19:12:40,241 INFO L78 Accepts]: Start accepts. Automaton has 5585 states and 7932 transitions. Word has length 82 [2022-04-06 19:12:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:12:40,241 INFO L478 AbstractCegarLoop]: Abstraction has 5585 states and 7932 transitions. [2022-04-06 19:12:40,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (10), 10 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 19:12:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5585 states and 7932 transitions. [2022-04-06 19:12:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:12:40,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:12:40,242 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:12:40,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 19:12:40,243 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:12:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:12:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -252551860, now seen corresponding path program 1 times [2022-04-06 19:12:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:40,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829616348] [2022-04-06 19:12:40,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:12:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -252551860, now seen corresponding path program 2 times [2022-04-06 19:12:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:12:40,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442649327] [2022-04-06 19:12:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:12:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:12:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:12:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:12:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:12:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:12:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:12:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:12:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:12:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 19:12:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:12:40,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:12:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442649327] [2022-04-06 19:12:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442649327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:40,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:40,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:12:40,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:12:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829616348] [2022-04-06 19:12:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829616348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:40,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:40,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:12:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282281580] [2022-04-06 19:12:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:12:40,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:12:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:40,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:12:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:12:40,757 INFO L87 Difference]: Start difference. First operand 5585 states and 7932 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:12:48,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:12:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:12:55,237 INFO L93 Difference]: Finished difference Result 11681 states and 17002 transitions. [2022-04-06 19:12:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:12:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 10 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 83 [2022-04-06 19:12:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:12:55,250 INFO L225 Difference]: With dead ends: 11681 [2022-04-06 19:12:55,250 INFO L226 Difference]: Without dead ends: 6654 [2022-04-06 19:12:55,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:12:55,257 INFO L913 BasicCegarLoop]: 651 mSDtfsCounter, 1760 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 789 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:12:55,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 1509 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 4017 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-04-06 19:12:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2022-04-06 19:12:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 5597. [2022-04-06 19:12:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 4496 states have (on average 1.4128113879003559) internal successors, (6352), 4606 states have internal predecessors, (6352), 677 states have call successors, (677), 351 states have call predecessors, (677), 423 states have return successors, (915), 661 states have call predecessors, (915), 659 states have call successors, (915) [2022-04-06 19:12:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7944 transitions. [2022-04-06 19:12:57,737 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7944 transitions. Word has length 83 [2022-04-06 19:12:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:12:57,737 INFO L478 AbstractCegarLoop]: Abstraction has 5597 states and 7944 transitions. [2022-04-06 19:12:57,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:12:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7944 transitions. [2022-04-06 19:12:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 19:12:57,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:12:57,739 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:12:57,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 19:12:57,739 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:12:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:12:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 5334329, now seen corresponding path program 1 times [2022-04-06 19:12:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:57,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728783172] [2022-04-06 19:12:57,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:12:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 5334329, now seen corresponding path program 2 times [2022-04-06 19:12:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:12:57,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762921569] [2022-04-06 19:12:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:12:57,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:12:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:57,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:12:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:12:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:12:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:12:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:12:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:12:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 19:12:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 19:12:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:12:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:12:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:12:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:12:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762921569] [2022-04-06 19:12:58,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762921569] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:58,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:58,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:12:58,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:12:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728783172] [2022-04-06 19:12:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728783172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:12:58,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:12:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:12:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870592347] [2022-04-06 19:12:58,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:12:58,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:12:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:12:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:12:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:12:58,210 INFO L87 Difference]: Start difference. First operand 5597 states and 7944 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (11), 11 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 19:13:08,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:13:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:13:16,149 INFO L93 Difference]: Finished difference Result 6529 states and 9478 transitions. [2022-04-06 19:13:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:13:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (11), 11 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-04-06 19:13:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:13:16,163 INFO L225 Difference]: With dead ends: 6529 [2022-04-06 19:13:16,164 INFO L226 Difference]: Without dead ends: 6507 [2022-04-06 19:13:16,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:13:16,166 INFO L913 BasicCegarLoop]: 663 mSDtfsCounter, 1664 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 5516 mSolverCounterSat, 683 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 6200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 5516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:13:16,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 1887 Invalid, 6200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 5516 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2022-04-06 19:13:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2022-04-06 19:13:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 5596. [2022-04-06 19:13:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 4496 states have (on average 1.4125889679715302) internal successors, (6351), 4605 states have internal predecessors, (6351), 676 states have call successors, (676), 351 states have call predecessors, (676), 423 states have return successors, (914), 661 states have call predecessors, (914), 658 states have call successors, (914) [2022-04-06 19:13:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 7941 transitions. [2022-04-06 19:13:18,720 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 7941 transitions. Word has length 84 [2022-04-06 19:13:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:13:18,721 INFO L478 AbstractCegarLoop]: Abstraction has 5596 states and 7941 transitions. [2022-04-06 19:13:18,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (11), 11 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 19:13:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 7941 transitions. [2022-04-06 19:13:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 19:13:18,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:13:18,722 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] [2022-04-06 19:13:18,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 19:13:18,722 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:13:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:13:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -848816393, now seen corresponding path program 1 times [2022-04-06 19:13:18,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:13:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [687748188] [2022-04-06 19:13:18,723 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:13:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -848816393, now seen corresponding path program 2 times [2022-04-06 19:13:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:13:18,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994893608] [2022-04-06 19:13:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:13:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:13:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:18,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:13:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:18,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:13:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:13:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:13:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:13:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:13:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 19:13:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:13:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 19:13:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:13:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:13:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:13:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:13:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994893608] [2022-04-06 19:13:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994893608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:13:19,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:13:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:13:19,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:13:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [687748188] [2022-04-06 19:13:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [687748188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:13:19,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:13:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:13:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778276278] [2022-04-06 19:13:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:13:19,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:13:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:13:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:13:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:13:19,211 INFO L87 Difference]: Start difference. First operand 5596 states and 7941 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 10 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-04-06 19:13:24,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:13:26,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:13:31,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:13:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:13:38,295 INFO L93 Difference]: Finished difference Result 9877 states and 14278 transitions. [2022-04-06 19:13:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:13:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 10 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 90 [2022-04-06 19:13:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:13:38,314 INFO L225 Difference]: With dead ends: 9877 [2022-04-06 19:13:38,314 INFO L226 Difference]: Without dead ends: 6531 [2022-04-06 19:13:38,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:13:38,321 INFO L913 BasicCegarLoop]: 642 mSDtfsCounter, 2412 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 1065 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 4041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:13:38,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2450 Valid, 1359 Invalid, 4041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1065 Valid, 2973 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2022-04-06 19:13:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2022-04-06 19:13:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 5565. [2022-04-06 19:13:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 4473 states have (on average 1.412921976302258) internal successors, (6320), 4580 states have internal predecessors, (6320), 673 states have call successors, (673), 349 states have call predecessors, (673), 418 states have return successors, (892), 657 states have call predecessors, (892), 655 states have call successors, (892) [2022-04-06 19:13:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 7885 transitions. [2022-04-06 19:13:40,901 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 7885 transitions. Word has length 90 [2022-04-06 19:13:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:13:40,901 INFO L478 AbstractCegarLoop]: Abstraction has 5565 states and 7885 transitions. [2022-04-06 19:13:40,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 10 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-04-06 19:13:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 7885 transitions. [2022-04-06 19:13:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 19:13:40,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:13:40,903 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] [2022-04-06 19:13:40,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-06 19:13:40,903 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:13:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:13:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1334190776, now seen corresponding path program 1 times [2022-04-06 19:13:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:13:40,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561617765] [2022-04-06 19:13:40,903 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:13:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1334190776, now seen corresponding path program 2 times [2022-04-06 19:13:40,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:13:40,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801936947] [2022-04-06 19:13:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:13:40,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:13:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:13:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:13:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:13:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:13:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:13:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:13:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:13:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 19:13:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 19:13:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:13:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:13:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:13:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801936947] [2022-04-06 19:13:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801936947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:13:41,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:13:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:13:41,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:13:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561617765] [2022-04-06 19:13:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561617765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:13:41,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:13:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:13:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462820568] [2022-04-06 19:13:41,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:13:41,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:13:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:13:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:13:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:13:41,433 INFO L87 Difference]: Start difference. First operand 5565 states and 7885 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:13:51,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:13:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:13:58,673 INFO L93 Difference]: Finished difference Result 11608 states and 16865 transitions. [2022-04-06 19:13:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:13:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 86 [2022-04-06 19:13:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:13:58,691 INFO L225 Difference]: With dead ends: 11608 [2022-04-06 19:13:58,691 INFO L226 Difference]: Without dead ends: 6550 [2022-04-06 19:13:58,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:13:58,704 INFO L913 BasicCegarLoop]: 638 mSDtfsCounter, 1596 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 696 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:13:58,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 1600 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 4887 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2022-04-06 19:13:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2022-04-06 19:14:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 5625. [2022-04-06 19:14:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5625 states, 4518 states have (on average 1.4088092076139884) internal successors, (6365), 4625 states have internal predecessors, (6365), 673 states have call successors, (673), 349 states have call predecessors, (673), 433 states have return successors, (907), 672 states have call predecessors, (907), 655 states have call successors, (907) [2022-04-06 19:14:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5625 states to 5625 states and 7945 transitions. [2022-04-06 19:14:01,409 INFO L78 Accepts]: Start accepts. Automaton has 5625 states and 7945 transitions. Word has length 86 [2022-04-06 19:14:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:14:01,409 INFO L478 AbstractCegarLoop]: Abstraction has 5625 states and 7945 transitions. [2022-04-06 19:14:01,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:14:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5625 states and 7945 transitions. [2022-04-06 19:14:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 19:14:01,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:14:01,411 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] [2022-04-06 19:14:01,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-06 19:14:01,411 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:14:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:14:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash -680978953, now seen corresponding path program 1 times [2022-04-06 19:14:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:01,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1473611941] [2022-04-06 19:14:01,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:14:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash -680978953, now seen corresponding path program 2 times [2022-04-06 19:14:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:14:01,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138014176] [2022-04-06 19:14:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:14:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:14:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:14:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:14:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:14:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:14:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:14:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:14:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:14:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 19:14:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 19:14:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:14:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:14:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138014176] [2022-04-06 19:14:01,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138014176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:01,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:01,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:14:01,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:14:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1473611941] [2022-04-06 19:14:01,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1473611941] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:01,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:01,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:14:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073868942] [2022-04-06 19:14:01,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:14:01,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:14:01,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:14:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:14:01,979 INFO L87 Difference]: Start difference. First operand 5625 states and 7945 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:14:13,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:14:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:14:21,224 INFO L93 Difference]: Finished difference Result 11730 states and 16948 transitions. [2022-04-06 19:14:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:14:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 86 [2022-04-06 19:14:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:14:21,239 INFO L225 Difference]: With dead ends: 11730 [2022-04-06 19:14:21,239 INFO L226 Difference]: Without dead ends: 6631 [2022-04-06 19:14:21,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:14:21,250 INFO L913 BasicCegarLoop]: 631 mSDtfsCounter, 1624 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 4715 mSolverCounterSat, 698 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 5414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 4715 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:14:21,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 1665 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 4715 Invalid, 1 Unknown, 0 Unchecked, 13.8s Time] [2022-04-06 19:14:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6631 states. [2022-04-06 19:14:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6631 to 5646. [2022-04-06 19:14:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 4539 states have (on average 1.4069178233090989) internal successors, (6386), 4649 states have internal predecessors, (6386), 673 states have call successors, (673), 349 states have call predecessors, (673), 433 states have return successors, (907), 669 states have call predecessors, (907), 655 states have call successors, (907) [2022-04-06 19:14:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 7966 transitions. [2022-04-06 19:14:23,998 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 7966 transitions. Word has length 86 [2022-04-06 19:14:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:14:23,999 INFO L478 AbstractCegarLoop]: Abstraction has 5646 states and 7966 transitions. [2022-04-06 19:14:23,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2022-04-06 19:14:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 7966 transitions. [2022-04-06 19:14:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 19:14:24,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:14:24,000 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:14:24,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-06 19:14:24,000 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:14:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:14:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -520968227, now seen corresponding path program 1 times [2022-04-06 19:14:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:24,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472644434] [2022-04-06 19:14:24,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:14:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -520968227, now seen corresponding path program 2 times [2022-04-06 19:14:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:14:24,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352736433] [2022-04-06 19:14:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:14:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:14:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:14:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:14:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:14:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:14:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:14:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:14:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:14:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 19:14:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 19:14:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 19:14:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 19:14:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:14:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:14:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352736433] [2022-04-06 19:14:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352736433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:24,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:14:24,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:14:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472644434] [2022-04-06 19:14:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472644434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:24,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:14:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533654075] [2022-04-06 19:14:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:14:24,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:14:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:14:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:14:24,697 INFO L87 Difference]: Start difference. First operand 5646 states and 7966 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-04-06 19:14:37,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:14:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:14:46,646 INFO L93 Difference]: Finished difference Result 6594 states and 9543 transitions. [2022-04-06 19:14:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:14:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) Word has length 88 [2022-04-06 19:14:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:14:46,662 INFO L225 Difference]: With dead ends: 6594 [2022-04-06 19:14:46,662 INFO L226 Difference]: Without dead ends: 6578 [2022-04-06 19:14:46,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:14:46,666 INFO L913 BasicCegarLoop]: 673 mSDtfsCounter, 1489 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 7583 mSolverCounterSat, 595 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 8179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 7583 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:14:46,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 2406 Invalid, 8179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [595 Valid, 7583 Invalid, 1 Unknown, 0 Unchecked, 16.6s Time] [2022-04-06 19:14:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6578 states. [2022-04-06 19:14:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6578 to 5646. [2022-04-06 19:14:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 4539 states have (on average 1.4069178233090989) internal successors, (6386), 4649 states have internal predecessors, (6386), 673 states have call successors, (673), 349 states have call predecessors, (673), 433 states have return successors, (907), 669 states have call predecessors, (907), 655 states have call successors, (907) [2022-04-06 19:14:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 7966 transitions. [2022-04-06 19:14:49,450 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 7966 transitions. Word has length 88 [2022-04-06 19:14:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:14:49,450 INFO L478 AbstractCegarLoop]: Abstraction has 5646 states and 7966 transitions. [2022-04-06 19:14:49,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-04-06 19:14:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 7966 transitions. [2022-04-06 19:14:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:14:49,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:14:49,452 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] [2022-04-06 19:14:49,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-06 19:14:49,452 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:14:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:14:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -243689622, now seen corresponding path program 1 times [2022-04-06 19:14:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727809700] [2022-04-06 19:14:49,453 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:14:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -243689622, now seen corresponding path program 2 times [2022-04-06 19:14:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:14:49,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106724542] [2022-04-06 19:14:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:14:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:14:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:14:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:14:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:14:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:14:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:14:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:49,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:14:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 19:14:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:14:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:14:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:14:50,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:14:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106724542] [2022-04-06 19:14:50,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106724542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:50,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:50,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:14:50,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:14:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727809700] [2022-04-06 19:14:50,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727809700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:14:50,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:14:50,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:14:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843813331] [2022-04-06 19:14:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:14:50,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:14:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:14:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:14:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:14:50,195 INFO L87 Difference]: Start difference. First operand 5646 states and 7966 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:15:03,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:15:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:15:11,531 INFO L93 Difference]: Finished difference Result 6575 states and 9492 transitions. [2022-04-06 19:15:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:15:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 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 85 [2022-04-06 19:15:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:15:11,543 INFO L225 Difference]: With dead ends: 6575 [2022-04-06 19:15:11,543 INFO L226 Difference]: Without dead ends: 6552 [2022-04-06 19:15:11,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:15:11,545 INFO L913 BasicCegarLoop]: 664 mSDtfsCounter, 1656 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 7434 mSolverCounterSat, 710 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 7434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:15:11,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 2432 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 7434 Invalid, 1 Unknown, 0 Unchecked, 16.0s Time] [2022-04-06 19:15:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2022-04-06 19:15:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5642. [2022-04-06 19:15:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 4536 states have (on average 1.4069664902998236) internal successors, (6382), 4646 states have internal predecessors, (6382), 672 states have call successors, (672), 349 states have call predecessors, (672), 433 states have return successors, (906), 668 states have call predecessors, (906), 654 states have call successors, (906) [2022-04-06 19:15:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7960 transitions. [2022-04-06 19:15:14,287 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7960 transitions. Word has length 85 [2022-04-06 19:15:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:15:14,287 INFO L478 AbstractCegarLoop]: Abstraction has 5642 states and 7960 transitions. [2022-04-06 19:15:14,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:15:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7960 transitions. [2022-04-06 19:15:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:15:14,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:15:14,289 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] [2022-04-06 19:15:14,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-06 19:15:14,289 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:15:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:15:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash -19498270, now seen corresponding path program 1 times [2022-04-06 19:15:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:15:14,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441011668] [2022-04-06 19:15:14,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:15:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash -19498270, now seen corresponding path program 2 times [2022-04-06 19:15:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:15:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136785589] [2022-04-06 19:15:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:15:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:15:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:15:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:15:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:15:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:15:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:15:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:15:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 19:15:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:15:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:15:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:15:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136785589] [2022-04-06 19:15:14,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136785589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:15:14,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:15:14,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:15:14,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:15:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441011668] [2022-04-06 19:15:14,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441011668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:15:14,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:15:14,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:15:14,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075094406] [2022-04-06 19:15:14,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:15:14,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:15:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:15:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:15:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:15:14,804 INFO L87 Difference]: Start difference. First operand 5642 states and 7960 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:15:26,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 19:15:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:15:35,465 INFO L93 Difference]: Finished difference Result 6571 states and 9486 transitions. [2022-04-06 19:15:35,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:15:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 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 85 [2022-04-06 19:15:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:15:35,477 INFO L225 Difference]: With dead ends: 6571 [2022-04-06 19:15:35,478 INFO L226 Difference]: Without dead ends: 6547 [2022-04-06 19:15:35,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:15:35,479 INFO L913 BasicCegarLoop]: 660 mSDtfsCounter, 1451 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 8247 mSolverCounterSat, 623 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 8247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:15:35,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 2487 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 8247 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2022-04-06 19:15:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2022-04-06 19:15:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 5637. [2022-04-06 19:15:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 4532 states have (on average 1.4071050308914386) internal successors, (6377), 4642 states have internal predecessors, (6377), 671 states have call successors, (671), 349 states have call predecessors, (671), 433 states have return successors, (905), 667 states have call predecessors, (905), 653 states have call successors, (905) [2022-04-06 19:15:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 7953 transitions. [2022-04-06 19:15:38,195 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 7953 transitions. Word has length 85 [2022-04-06 19:15:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:15:38,195 INFO L478 AbstractCegarLoop]: Abstraction has 5637 states and 7953 transitions. [2022-04-06 19:15:38,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 7 states have internal predecessors, (67), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 19:15:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 7953 transitions. [2022-04-06 19:15:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 19:15:38,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:15:38,197 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:15:38,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-06 19:15:38,197 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:15:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:15:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1377173641, now seen corresponding path program 1 times [2022-04-06 19:15:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:15:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655695913] [2022-04-06 19:15:38,197 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:15:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1377173641, now seen corresponding path program 2 times [2022-04-06 19:15:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:15:38,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670848747] [2022-04-06 19:15:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:15:38,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:15:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:15:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 19:15:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 19:15:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 19:15:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 19:15:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:15:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:15:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:15:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 19:15:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 19:15:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:15:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:15:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:15:38,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670848747] [2022-04-06 19:15:38,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670848747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:15:38,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:15:38,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:15:38,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:15:38,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655695913] [2022-04-06 19:15:38,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655695913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:15:38,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:15:38,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:15:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267292537] [2022-04-06 19:15:38,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:15:38,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:15:38,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:15:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:15:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:15:38,663 INFO L87 Difference]: Start difference. First operand 5637 states and 7953 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 19:15:48,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []