/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-b030c9e [2022-03-20 17:25:17,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:25:17,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:25:17,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:25:17,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:25:17,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:25:17,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:25:17,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:25:17,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:25:17,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:25:17,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:25:17,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:25:17,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:25:17,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:25:17,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:25:17,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:25:17,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:25:17,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:25:17,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:25:17,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:25:17,203 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:25:17,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:25:17,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:25:17,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:25:17,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:25:17,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 17:25:17,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:25:17,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:25:17,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:25:17,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:25:17,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:25:17,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:25:17,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:25:17,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:25:17,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:25:17,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:25:17,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:25:17,230 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:25:17,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:25:17,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:25:17,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:25:17,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:25:17,452 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:25:17,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers/floppy.i.cil-3.c [2022-03-20 17:25:17,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fabc560a/57a618f17f62450fa4a683d73f6faf8b/FLAG5222bc9bb [2022-03-20 17:25:18,024 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:25:18,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/floppy.i.cil-3.c [2022-03-20 17:25:18,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fabc560a/57a618f17f62450fa4a683d73f6faf8b/FLAG5222bc9bb [2022-03-20 17:25:18,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fabc560a/57a618f17f62450fa4a683d73f6faf8b [2022-03-20 17:25:18,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:25:18,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:25:18,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:25:18,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:25:18,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:25:18,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:25:18" (1/1) ... [2022-03-20 17:25:18,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b23912d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:18, skipping insertion in model container [2022-03-20 17:25:18,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:25:18" (1/1) ... [2022-03-20 17:25:18,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:25:18,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:25:18,720 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] [2022-03-20 17:25:19,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:25:19,078 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:25:19,125 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] [2022-03-20 17:25:19,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:25:19,316 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:25:19,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19 WrapperNode [2022-03-20 17:25:19,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:25:19,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:25:19,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:25:19,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:25:19,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:25:19,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:25:19,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:25:19,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:25:19,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (1/1) ... [2022-03-20 17:25:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:25:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:25:19,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:25:19,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure DriverEntry [2022-03-20 17:25:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyUnload [2022-03-20 17:25:19,638 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyAddDevice [2022-03-20 17:25:19,638 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConfigCallBack [2022-03-20 17:25:19,638 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPower [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyReadWrite [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInterpretError [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFinishOperation [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlStartDrive [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDatarateSpecifyConfigure [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlRecalibrateDrive [2022-03-20 17:25:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDetermineMediaType [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAllocateIoBuffer [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFreeIoBuffer [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyThread [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConsolidateMediaTypeWithBootSector [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckBootSector [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWriteTrack [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWrite [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFormat [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlIssueCommand [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInitializeControllerHardware [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FlHdbit [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCancelQueuedRequest [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-20 17:25:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAcquireFastMutex [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExReleaseFastMutex [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExFreePool [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertHeadList [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedRemoveHeadList [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAllocateMdl [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAttachDeviceToDeviceStack [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildAsynchronousFsdRequest [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateDevice [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateSymbolicLink [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteDevice [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-20 17:25:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDetachDevice [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeIrp [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeMdl [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoReleaseCancelSpinLock [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetHardErrorOrVerifyDevice [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-20 17:25:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeAcquireSpinLockRaiseToDpc [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeDelayExecutionThread [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeEvent [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSemaphore [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSpinLock [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeReleaseSemaphore [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KfReleaseSpinLock [2022-03-20 17:25:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-20 17:25:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-20 17:25:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure MmAllocateContiguousMemory [2022-03-20 17:25:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure MmFreeContiguousMemory [2022-03-20 17:25:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure MmMapLockedPagesSpecifyCache [2022-03-20 17:25:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure MmPageEntireDriver [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure MmResetDriverPaging [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure MmUnlockPages [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ObfDereferenceObject [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure PoStartNextPowerIrp [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure PsTerminateSystemThread [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlAnsiStringToUnicodeString [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCompareMemory [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCopyUnicodeString [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlDeleteRegistryValue [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlFreeUnicodeString [2022-03-20 17:25:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitString [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitUnicodeString [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlQueryRegistryValues [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-03-20 17:25:19,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-03-20 17:25:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:25:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:25:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:25:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:25:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-20 17:25:19,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 17:25:19,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:25:19,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 17:25:19,647 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure swprintf [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlQueryRegistryValues [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlDeleteRegistryValue [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitString [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitUnicodeString [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlAnsiStringToUnicodeString [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCopyUnicodeString [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlFreeUnicodeString [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCompareMemory [2022-03-20 17:25:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeEvent [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSemaphore [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeReleaseSemaphore [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeDelayExecutionThread [2022-03-20 17:25:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-20 17:25:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSpinLock [2022-03-20 17:25:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure KfReleaseSpinLock [2022-03-20 17:25:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-03-20 17:25:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure ExFreePool [2022-03-20 17:25:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure ExAcquireFastMutex [2022-03-20 17:25:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure ExReleaseFastMutex [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertHeadList [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedRemoveHeadList [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmUnlockPages [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmMapLockedPagesSpecifyCache [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmAllocateContiguousMemory [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmFreeContiguousMemory [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmResetDriverPaging [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure MmPageEntireDriver [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure PsTerminateSystemThread [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IoAllocateMdl [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IoAttachDeviceToDeviceStack [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildAsynchronousFsdRequest [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-20 17:25:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateDevice [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateSymbolicLink [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteDevice [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoDetachDevice [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeIrp [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeMdl [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoReleaseCancelSpinLock [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetHardErrorOrVerifyDevice [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure PoStartNextPowerIrp [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ObfDereferenceObject [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure DriverEntry [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyUnload [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure FlConfigCallBack [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure FlInitializeControllerHardware [2022-03-20 17:25:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyReadWrite [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlRecalibrateDrive [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlDatarateSpecifyConfigure [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlStartDrive [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlFinishOperation [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlDetermineMediaType [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyThread [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWrite [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlFormat [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlIssueCommand [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlInterpretError [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlAllocateIoBuffer [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlFreeIoBuffer [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlConsolidateMediaTypeWithBootSector [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckBootSector [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWriteTrack [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-20 17:25:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyAddDevice [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPower [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCancelQueuedRequest [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure FlHdbit [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:25:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure KeAcquireSpinLockRaiseToDpc [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-03-20 17:25:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-03-20 17:25:20,165 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:25:20,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:25:20,197 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:20,249 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:20,249 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:20,249 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:20,267 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:20,267 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,893 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,899 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,899 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,900 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,913 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,913 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,917 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,925 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,925 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,962 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,967 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,967 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,968 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,977 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,977 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:21,977 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:21,984 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:21,984 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:22,030 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,091 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2022-03-20 17:25:22,091 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2022-03-20 17:25:22,149 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,153 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:22,153 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:22,154 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:22,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:22,165 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,174 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:22,175 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:22,184 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,189 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:22,189 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:22,190 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:22,195 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:22,195 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:27,922 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:27,938 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-20 17:25:27,938 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-20 17:25:27,978 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:28,273 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-03-20 17:25:28,273 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-03-20 17:25:28,519 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:28,522 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:28,522 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:28,574 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:28,596 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-03-20 17:25:28,597 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-03-20 17:25:28,599 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:28,707 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-20 17:25:28,707 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-20 17:25:28,708 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:28,754 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2022-03-20 17:25:28,754 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2022-03-20 17:25:39,521 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:39,524 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:39,524 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:39,606 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:39,609 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:39,609 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:39,623 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:41,990 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2022-03-20 17:25:41,991 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2022-03-20 17:25:42,029 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,208 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-03-20 17:25:42,208 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-03-20 17:25:42,209 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,220 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-20 17:25:42,220 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-20 17:25:42,220 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,246 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-03-20 17:25:42,246 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-03-20 17:25:42,249 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,256 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-20 17:25:42,256 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-20 17:25:42,295 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,298 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:42,298 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:42,308 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,312 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:25:42,312 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:25:42,312 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:42,374 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume !false; [2022-03-20 17:25:42,374 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##45: assume false; [2022-03-20 17:25:42,418 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:25:44,749 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume !false; [2022-03-20 17:25:44,749 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##13: assume false; [2022-03-20 17:25:44,784 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:25:44,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:25:44,799 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2022-03-20 17:25:44,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:25:44 BoogieIcfgContainer [2022-03-20 17:25:44,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:25:44,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:25:44,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:25:44,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:25:44,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:25:18" (1/3) ... [2022-03-20 17:25:44,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac7f1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:25:44, skipping insertion in model container [2022-03-20 17:25:44,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:25:19" (2/3) ... [2022-03-20 17:25:44,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac7f1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:25:44, skipping insertion in model container [2022-03-20 17:25:44,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:25:44" (3/3) ... [2022-03-20 17:25:44,810 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-03-20 17:25:44,813 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:25:44,813 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:25:44,847 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:25:44,855 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:25:44,855 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:25:44,887 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) [2022-03-20 17:25:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:25:44,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:25:44,893 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:25:44,893 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:25:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:25:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1208806804, now seen corresponding path program 1 times [2022-03-20 17:25:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:25:44,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401722724] [2022-03-20 17:25:44,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:25:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1208806804, now seen corresponding path program 2 times [2022-03-20 17:25:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:25:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332160161] [2022-03-20 17:25:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:25:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:25:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:25:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:25:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:25:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:25:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:25:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:25:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:25:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332160161] [2022-03-20 17:25:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332160161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:25:45,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:25:45,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:25:45,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:25:45,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401722724] [2022-03-20 17:25:45,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401722724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:25:45,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:25:45,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:25:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742788381] [2022-03-20 17:25:45,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:25:45,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:25:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:25:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:25:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:25:45,779 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) [2022-03-20 17:25:50,465 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 [] [2022-03-20 17:25:54,929 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 [] [2022-03-20 17:25:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:25:56,126 INFO L93 Difference]: Finished difference Result 1453 states and 2231 transitions. [2022-03-20 17:25:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:25:56,129 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 [2022-03-20 17:25:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:25:56,155 INFO L225 Difference]: With dead ends: 1453 [2022-03-20 17:25:56,156 INFO L226 Difference]: Without dead ends: 858 [2022-03-20 17:25:56,164 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 [2022-03-20 17:25:56,172 INFO L913 BasicCegarLoop]: 747 mSDtfsCounter, 1345 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 617 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 3720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:25:56,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 1283 Invalid, 3720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 3101 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2022-03-20 17:25:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-20 17:25:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 670. [2022-03-20 17:25:56,288 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) [2022-03-20 17:25:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 931 transitions. [2022-03-20 17:25:56,293 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 931 transitions. Word has length 37 [2022-03-20 17:25:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:25:56,293 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 931 transitions. [2022-03-20 17:25:56,293 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) [2022-03-20 17:25:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 931 transitions. [2022-03-20 17:25:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 17:25:56,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:25:56,295 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] [2022-03-20 17:25:56,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:25:56,296 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:25:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:25:56,297 INFO L85 PathProgramCache]: Analyzing trace with hash 171558063, now seen corresponding path program 1 times [2022-03-20 17:25:56,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:25:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401047265] [2022-03-20 17:25:56,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:25:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 171558063, now seen corresponding path program 2 times [2022-03-20 17:25:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:25:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454029844] [2022-03-20 17:25:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:25:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:25:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:25:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:25:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:25:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:25:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:25:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:25:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:25:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:25:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:25:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454029844] [2022-03-20 17:25:56,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454029844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:25:56,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:25:56,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:25:56,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:25:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401047265] [2022-03-20 17:25:56,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401047265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:25:56,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:25:56,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:25:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368750506] [2022-03-20 17:25:56,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:25:56,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:25:56,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:25:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:25:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:25:56,775 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) [2022-03-20 17:26:01,084 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 [] [2022-03-20 17:26:04,811 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 [] [2022-03-20 17:26:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:26:08,775 INFO L93 Difference]: Finished difference Result 1951 states and 2856 transitions. [2022-03-20 17:26:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:26:08,776 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 [2022-03-20 17:26:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:26:08,783 INFO L225 Difference]: With dead ends: 1951 [2022-03-20 17:26:08,784 INFO L226 Difference]: Without dead ends: 1471 [2022-03-20 17:26:08,785 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 [2022-03-20 17:26:08,786 INFO L913 BasicCegarLoop]: 940 mSDtfsCounter, 3479 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 1404 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1404 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:26:08,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 1666 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1404 Valid, 3508 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-03-20 17:26:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-03-20 17:26:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1230. [2022-03-20 17:26:08,934 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) [2022-03-20 17:26:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1762 transitions. [2022-03-20 17:26:08,940 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1762 transitions. Word has length 42 [2022-03-20 17:26:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:26:08,940 INFO L478 AbstractCegarLoop]: Abstraction has 1230 states and 1762 transitions. [2022-03-20 17:26:08,940 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) [2022-03-20 17:26:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1762 transitions. [2022-03-20 17:26:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:26:08,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:26:08,948 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:26:08,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:26:08,948 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:26:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:26:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1220689, now seen corresponding path program 1 times [2022-03-20 17:26:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117499885] [2022-03-20 17:26:08,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:26:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1220689, now seen corresponding path program 2 times [2022-03-20 17:26:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:26:08,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211671400] [2022-03-20 17:26:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:26:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:26:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:26:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:26:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:26:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:26:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:26:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 17:26:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:26:09,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:26:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211671400] [2022-03-20 17:26:09,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211671400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:09,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:09,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:09,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:26:09,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117499885] [2022-03-20 17:26:09,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117499885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:09,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:09,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262819801] [2022-03-20 17:26:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:26:09,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:26:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:26:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:26:09,466 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) [2022-03-20 17:26:14,994 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 [] [2022-03-20 17:26:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:26:18,140 INFO L93 Difference]: Finished difference Result 2279 states and 3379 transitions. [2022-03-20 17:26:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:26:18,141 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 [2022-03-20 17:26:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:26:18,150 INFO L225 Difference]: With dead ends: 2279 [2022-03-20 17:26:18,150 INFO L226 Difference]: Without dead ends: 2260 [2022-03-20 17:26:18,151 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 [2022-03-20 17:26:18,151 INFO L913 BasicCegarLoop]: 722 mSDtfsCounter, 3868 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 2855 mSolverCounterSat, 1490 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3928 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 2855 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:26:18,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3928 Valid, 1301 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 2855 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-03-20 17:26:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-03-20 17:26:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1905. [2022-03-20 17:26:18,358 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) [2022-03-20 17:26:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2769 transitions. [2022-03-20 17:26:18,365 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2769 transitions. Word has length 54 [2022-03-20 17:26:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:26:18,366 INFO L478 AbstractCegarLoop]: Abstraction has 1905 states and 2769 transitions. [2022-03-20 17:26:18,366 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) [2022-03-20 17:26:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2769 transitions. [2022-03-20 17:26:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:26:18,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:26:18,367 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:26:18,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:26:18,367 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:26:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:26:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1955103331, now seen corresponding path program 1 times [2022-03-20 17:26:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [36807445] [2022-03-20 17:26:18,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:26:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1955103331, now seen corresponding path program 2 times [2022-03-20 17:26:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:26:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292366734] [2022-03-20 17:26:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:26:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:26:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:26:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:26:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:26:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:26:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:26:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:26:18,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:26:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292366734] [2022-03-20 17:26:18,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292366734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:18,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:18,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:18,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:26:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [36807445] [2022-03-20 17:26:18,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [36807445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:18,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:18,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:18,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251823527] [2022-03-20 17:26:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:26:18,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:26:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:26:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:26:18,800 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) [2022-03-20 17:26:25,055 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 [] [2022-03-20 17:26:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:26:26,902 INFO L93 Difference]: Finished difference Result 2254 states and 3363 transitions. [2022-03-20 17:26:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:26:26,902 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 [2022-03-20 17:26:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:26:26,910 INFO L225 Difference]: With dead ends: 2254 [2022-03-20 17:26:26,910 INFO L226 Difference]: Without dead ends: 2250 [2022-03-20 17:26:26,911 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 [2022-03-20 17:26:26,912 INFO L913 BasicCegarLoop]: 726 mSDtfsCounter, 1720 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 754 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s 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, 7.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:26:26,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 1278 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 3121 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-03-20 17:26:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-03-20 17:26:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 1942. [2022-03-20 17:26:27,132 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) [2022-03-20 17:26:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2820 transitions. [2022-03-20 17:26:27,139 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2820 transitions. Word has length 55 [2022-03-20 17:26:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:26:27,139 INFO L478 AbstractCegarLoop]: Abstraction has 1942 states and 2820 transitions. [2022-03-20 17:26:27,139 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) [2022-03-20 17:26:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2820 transitions. [2022-03-20 17:26:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:26:27,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:26:27,140 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:26:27,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:26:27,140 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:26:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:26:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1599289490, now seen corresponding path program 1 times [2022-03-20 17:26:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593725495] [2022-03-20 17:26:27,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:26:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1599289490, now seen corresponding path program 2 times [2022-03-20 17:26:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:26:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907220504] [2022-03-20 17:26:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:26:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:26:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:26:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:26:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:26:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:26:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:26:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:26:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:26:27,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907220504] [2022-03-20 17:26:27,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907220504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:27,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:27,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:26:27,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593725495] [2022-03-20 17:26:27,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593725495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:27,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:26:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595669465] [2022-03-20 17:26:27,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:26:27,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:26:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:26:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:26:27,596 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) [2022-03-20 17:26:33,673 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 [] [2022-03-20 17:26:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:26:38,205 INFO L93 Difference]: Finished difference Result 3881 states and 5849 transitions. [2022-03-20 17:26:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:26:38,205 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 [2022-03-20 17:26:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:26:38,220 INFO L225 Difference]: With dead ends: 3881 [2022-03-20 17:26:38,220 INFO L226 Difference]: Without dead ends: 3878 [2022-03-20 17:26:38,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:26:38,222 INFO L913 BasicCegarLoop]: 1152 mSDtfsCounter, 2146 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 4384 mSolverCounterSat, 914 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 4384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:26:38,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 1872 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 4384 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2022-03-20 17:26:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2022-03-20 17:26:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3105. [2022-03-20 17:26:38,659 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) [2022-03-20 17:26:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 4524 transitions. [2022-03-20 17:26:38,673 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 4524 transitions. Word has length 55 [2022-03-20 17:26:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:26:38,675 INFO L478 AbstractCegarLoop]: Abstraction has 3105 states and 4524 transitions. [2022-03-20 17:26:38,675 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) [2022-03-20 17:26:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 4524 transitions. [2022-03-20 17:26:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 17:26:38,677 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:26:38,677 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:26:38,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 17:26:38,677 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:26:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:26:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2095199445, now seen corresponding path program 1 times [2022-03-20 17:26:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142767188] [2022-03-20 17:26:38,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:26:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2095199445, now seen corresponding path program 2 times [2022-03-20 17:26:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:26:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889420009] [2022-03-20 17:26:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:26:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:26:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:26:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:26:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:26:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:26:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:26:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:26:39,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:26:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889420009] [2022-03-20 17:26:39,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889420009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:39,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:39,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:26:39,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:26:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142767188] [2022-03-20 17:26:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142767188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:39,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:39,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:26:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115299485] [2022-03-20 17:26:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:26:39,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:26:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:26:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:26:39,180 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) [2022-03-20 17:26:46,920 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 [] [2022-03-20 17:26:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:26:54,579 INFO L93 Difference]: Finished difference Result 6653 states and 9861 transitions. [2022-03-20 17:26:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 17:26:54,579 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 [2022-03-20 17:26:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:26:54,595 INFO L225 Difference]: With dead ends: 6653 [2022-03-20 17:26:54,595 INFO L226 Difference]: Without dead ends: 3833 [2022-03-20 17:26:54,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:26:54,605 INFO L913 BasicCegarLoop]: 981 mSDtfsCounter, 5008 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 6688 mSolverCounterSat, 2192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5054 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 8881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2192 IncrementalHoareTripleChecker+Valid, 6688 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:26:54,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5054 Valid, 2055 Invalid, 8881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2192 Valid, 6688 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2022-03-20 17:26:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-03-20 17:26:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3099. [2022-03-20 17:26:55,057 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) [2022-03-20 17:26:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4510 transitions. [2022-03-20 17:26:55,066 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4510 transitions. Word has length 56 [2022-03-20 17:26:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:26:55,066 INFO L478 AbstractCegarLoop]: Abstraction has 3099 states and 4510 transitions. [2022-03-20 17:26:55,067 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) [2022-03-20 17:26:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4510 transitions. [2022-03-20 17:26:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 17:26:55,068 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:26:55,068 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:26:55,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 17:26:55,068 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:26:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:26:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2082718779, now seen corresponding path program 1 times [2022-03-20 17:26:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402693836] [2022-03-20 17:26:55,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:26:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2082718779, now seen corresponding path program 2 times [2022-03-20 17:26:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:26:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510872030] [2022-03-20 17:26:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:26:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:26:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:26:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:26:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:26:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:26:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:26:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 17:26:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:26:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:26:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:26:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:26:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510872030] [2022-03-20 17:26:55,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510872030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:55,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:55,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:26:55,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:26:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402693836] [2022-03-20 17:26:55,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402693836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:26:55,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:26:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:26:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059096731] [2022-03-20 17:26:55,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:26:55,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:26:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:26:55,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:26:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:26:55,597 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) [2022-03-20 17:27:03,095 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 [] [2022-03-20 17:27:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:27:08,713 INFO L93 Difference]: Finished difference Result 4462 states and 6724 transitions. [2022-03-20 17:27:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:27:08,713 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 [2022-03-20 17:27:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:27:08,735 INFO L225 Difference]: With dead ends: 4462 [2022-03-20 17:27:08,736 INFO L226 Difference]: Without dead ends: 4457 [2022-03-20 17:27:08,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:27:08,739 INFO L913 BasicCegarLoop]: 1060 mSDtfsCounter, 2954 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 4423 mSolverCounterSat, 1423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2988 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 5847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1423 IncrementalHoareTripleChecker+Valid, 4423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:27:08,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2988 Valid, 2028 Invalid, 5847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1423 Valid, 4423 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2022-03-20 17:27:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-03-20 17:27:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3755. [2022-03-20 17:27:09,299 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, (751), 491 states have call predecessors, (751), 484 states have call successors, (751) [2022-03-20 17:27:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 5489 transitions. [2022-03-20 17:27:09,310 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 5489 transitions. Word has length 56 [2022-03-20 17:27:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:27:09,310 INFO L478 AbstractCegarLoop]: Abstraction has 3755 states and 5489 transitions. [2022-03-20 17:27:09,310 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) [2022-03-20 17:27:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 5489 transitions. [2022-03-20 17:27:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 17:27:09,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:27:09,312 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:27:09,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 17:27:09,312 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:27:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:27:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2058578860, now seen corresponding path program 1 times [2022-03-20 17:27:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155788942] [2022-03-20 17:27:09,313 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:27:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2058578860, now seen corresponding path program 2 times [2022-03-20 17:27:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:27:09,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755168593] [2022-03-20 17:27:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:27:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:27:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:27:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:27:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:27:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:27:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:27:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 17:27:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:27:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:27:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755168593] [2022-03-20 17:27:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755168593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:09,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:09,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:09,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:27:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155788942] [2022-03-20 17:27:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155788942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:09,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:09,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360997088] [2022-03-20 17:27:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:27:09,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:27:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:27:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:27:09,848 INFO L87 Difference]: Start difference. First operand 3755 states and 5489 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-03-20 17:27:15,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:27:20,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:27:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:27:26,141 INFO L93 Difference]: Finished difference Result 4457 states and 6713 transitions. [2022-03-20 17:27:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 17:27:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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 58 [2022-03-20 17:27:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:27:26,158 INFO L225 Difference]: With dead ends: 4457 [2022-03-20 17:27:26,158 INFO L226 Difference]: Without dead ends: 4451 [2022-03-20 17:27:26,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=504, Invalid=1658, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:27:26,160 INFO L913 BasicCegarLoop]: 1033 mSDtfsCounter, 4615 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 2199 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4665 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 6635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2199 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:27:26,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4665 Valid, 1836 Invalid, 6635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2199 Valid, 4434 Invalid, 2 Unknown, 0 Unchecked, 13.1s Time] [2022-03-20 17:27:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2022-03-20 17:27:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3755. [2022-03-20 17:27:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 2956 states have (on average 1.4333558863328824) internal successors, (4237), 3023 states have internal predecessors, (4237), 500 states have call successors, (500), 258 states have call predecessors, (500), 298 states have return successors, (751), 491 states have call predecessors, (751), 484 states have call successors, (751) [2022-03-20 17:27:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 5488 transitions. [2022-03-20 17:27:26,749 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 5488 transitions. Word has length 58 [2022-03-20 17:27:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:27:26,750 INFO L478 AbstractCegarLoop]: Abstraction has 3755 states and 5488 transitions. [2022-03-20 17:27:26,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-03-20 17:27:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 5488 transitions. [2022-03-20 17:27:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 17:27:26,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:27:26,751 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:27:26,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 17:27:26,751 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:27:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:27:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 259939624, now seen corresponding path program 1 times [2022-03-20 17:27:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893051822] [2022-03-20 17:27:26,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:27:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 259939624, now seen corresponding path program 2 times [2022-03-20 17:27:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:27:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600947102] [2022-03-20 17:27:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:27:26,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:27:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:27:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:27:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:27:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:27:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:27:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 17:27:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:27:27,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:27:27,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600947102] [2022-03-20 17:27:27,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600947102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:27,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:27,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:27,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:27:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893051822] [2022-03-20 17:27:27,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893051822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:27,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:27,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338612716] [2022-03-20 17:27:27,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:27:27,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:27:27,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:27:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:27:27,276 INFO L87 Difference]: Start difference. First operand 3755 states and 5488 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-03-20 17:27:35,929 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 [] [2022-03-20 17:27:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:27:42,257 INFO L93 Difference]: Finished difference Result 4453 states and 6707 transitions. [2022-03-20 17:27:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 17:27:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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 58 [2022-03-20 17:27:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:27:42,274 INFO L225 Difference]: With dead ends: 4453 [2022-03-20 17:27:42,274 INFO L226 Difference]: Without dead ends: 4447 [2022-03-20 17:27:42,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=504, Invalid=1658, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:27:42,277 INFO L913 BasicCegarLoop]: 1031 mSDtfsCounter, 4047 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 4974 mSolverCounterSat, 1939 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4095 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1939 IncrementalHoareTripleChecker+Valid, 4974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:27:42,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4095 Valid, 1932 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1939 Valid, 4974 Invalid, 1 Unknown, 0 Unchecked, 11.8s Time] [2022-03-20 17:27:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-03-20 17:27:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 3755. [2022-03-20 17:27:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 2956 states have (on average 1.4330175913396481) internal successors, (4236), 3023 states have internal predecessors, (4236), 500 states have call successors, (500), 258 states have call predecessors, (500), 298 states have return successors, (751), 491 states have call predecessors, (751), 484 states have call successors, (751) [2022-03-20 17:27:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 5487 transitions. [2022-03-20 17:27:42,930 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 5487 transitions. Word has length 58 [2022-03-20 17:27:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:27:42,930 INFO L478 AbstractCegarLoop]: Abstraction has 3755 states and 5487 transitions. [2022-03-20 17:27:42,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-03-20 17:27:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 5487 transitions. [2022-03-20 17:27:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 17:27:42,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:27:42,932 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:27:42,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:27:42,932 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:27:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:27:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -449310488, now seen corresponding path program 1 times [2022-03-20 17:27:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:42,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293982028] [2022-03-20 17:27:42,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:27:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash -449310488, now seen corresponding path program 2 times [2022-03-20 17:27:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:27:42,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689261839] [2022-03-20 17:27:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:27:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:27:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:27:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:27:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:27:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:27:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:27:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 17:27:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:27:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:27:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:27:43,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:27:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689261839] [2022-03-20 17:27:43,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689261839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:43,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:43,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:43,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:27:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293982028] [2022-03-20 17:27:43,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293982028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:27:43,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:27:43,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:27:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403503149] [2022-03-20 17:27:43,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:27:43,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:27:43,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:27:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:27:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:27:43,517 INFO L87 Difference]: Start difference. First operand 3755 states and 5487 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) [2022-03-20 17:27:50,196 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 [] [2022-03-20 17:27:52,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:27:54,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:27:56,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:28:01,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:28:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:28:05,427 INFO L93 Difference]: Finished difference Result 4464 states and 6725 transitions. [2022-03-20 17:28:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:28:05,428 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 [2022-03-20 17:28:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:28:05,442 INFO L225 Difference]: With dead ends: 4464 [2022-03-20 17:28:05,442 INFO L226 Difference]: Without dead ends: 4447 [2022-03-20 17:28:05,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:28:05,446 INFO L913 BasicCegarLoop]: 735 mSDtfsCounter, 1847 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 5229 mSolverCounterSat, 824 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 6058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 5229 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:28:05,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1886 Valid, 1980 Invalid, 6058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 5229 Invalid, 5 Unknown, 0 Unchecked, 20.3s Time] [2022-03-20 17:28:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-03-20 17:28:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 3753. [2022-03-20 17:28:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 2955 states have (on average 1.4328257191201355) internal successors, (4234), 3022 states have internal predecessors, (4234), 499 states have call successors, (499), 258 states have call predecessors, (499), 298 states have return successors, (750), 490 states have call predecessors, (750), 483 states have call successors, (750) [2022-03-20 17:28:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 5483 transitions. [2022-03-20 17:28:06,124 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 5483 transitions. Word has length 59 [2022-03-20 17:28:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:28:06,124 INFO L478 AbstractCegarLoop]: Abstraction has 3753 states and 5483 transitions. [2022-03-20 17:28:06,125 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) [2022-03-20 17:28:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 5483 transitions. [2022-03-20 17:28:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 17:28:06,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:28:06,126 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:28:06,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 17:28:06,127 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:28:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:28:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1749808949, now seen corresponding path program 1 times [2022-03-20 17:28:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476157759] [2022-03-20 17:28:06,127 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:28:06,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1749808949, now seen corresponding path program 2 times [2022-03-20 17:28:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:28:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484506089] [2022-03-20 17:28:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:28:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:28:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:28:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:28:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:28:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:28:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:28:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 17:28:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:28:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:28:06,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484506089] [2022-03-20 17:28:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484506089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:06,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:06,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:28:06,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:28:06,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476157759] [2022-03-20 17:28:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476157759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:06,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:06,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:28:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746671964] [2022-03-20 17:28:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:28:06,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:28:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:28:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:28:06,631 INFO L87 Difference]: Start difference. First operand 3753 states and 5483 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) [2022-03-20 17:28:15,869 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 [] [2022-03-20 17:28:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:28:19,251 INFO L93 Difference]: Finished difference Result 4462 states and 6721 transitions. [2022-03-20 17:28:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:28:19,252 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 [2022-03-20 17:28:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:28:19,265 INFO L225 Difference]: With dead ends: 4462 [2022-03-20 17:28:19,265 INFO L226 Difference]: Without dead ends: 4440 [2022-03-20 17:28:19,268 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 [2022-03-20 17:28:19,269 INFO L913 BasicCegarLoop]: 719 mSDtfsCounter, 1783 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 5325 mSolverCounterSat, 744 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 6070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 5325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:28:19,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 1847 Invalid, 6070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 5325 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2022-03-20 17:28:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2022-03-20 17:28:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3746. [2022-03-20 17:28:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 2951 states have (on average 1.4330735343951202) internal successors, (4229), 3018 states have internal predecessors, (4229), 497 states have call successors, (497), 257 states have call predecessors, (497), 297 states have return successors, (748), 488 states have call predecessors, (748), 481 states have call successors, (748) [2022-03-20 17:28:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 5474 transitions. [2022-03-20 17:28:19,964 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 5474 transitions. Word has length 60 [2022-03-20 17:28:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:28:19,965 INFO L478 AbstractCegarLoop]: Abstraction has 3746 states and 5474 transitions. [2022-03-20 17:28:19,965 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) [2022-03-20 17:28:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 5474 transitions. [2022-03-20 17:28:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 17:28:19,966 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:28:19,966 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:28:19,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 17:28:19,966 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:28:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:28:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1939971839, now seen corresponding path program 1 times [2022-03-20 17:28:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306151140] [2022-03-20 17:28:19,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:28:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1939971839, now seen corresponding path program 2 times [2022-03-20 17:28:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:28:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224250694] [2022-03-20 17:28:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:28:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:28:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:28:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:28:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:28:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:28:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:28:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 17:28:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:28:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:28:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224250694] [2022-03-20 17:28:20,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224250694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:20,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:20,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:28:20,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:28:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306151140] [2022-03-20 17:28:20,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306151140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:20,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:20,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:28:20,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730989828] [2022-03-20 17:28:20,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:28:20,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:28:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:28:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:28:20,482 INFO L87 Difference]: Start difference. First operand 3746 states and 5474 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) [2022-03-20 17:28:27,054 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 [] [2022-03-20 17:28:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:28:33,721 INFO L93 Difference]: Finished difference Result 12172 states and 18769 transitions. [2022-03-20 17:28:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 17:28:33,721 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 [2022-03-20 17:28:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:28:33,749 INFO L225 Difference]: With dead ends: 12172 [2022-03-20 17:28:33,749 INFO L226 Difference]: Without dead ends: 8670 [2022-03-20 17:28:33,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:28:33,798 INFO L913 BasicCegarLoop]: 920 mSDtfsCounter, 4217 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 3263 mSolverCounterSat, 1889 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4276 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1889 IncrementalHoareTripleChecker+Valid, 3263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:28:33,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4276 Valid, 1771 Invalid, 5153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1889 Valid, 3263 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-03-20 17:28:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2022-03-20 17:28:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7477. [2022-03-20 17:28:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7477 states, 5891 states have (on average 1.443388219317603) internal successors, (8503), 6073 states have internal predecessors, (8503), 1008 states have call successors, (1008), 475 states have call predecessors, (1008), 577 states have return successors, (1804), 964 states have call predecessors, (1804), 995 states have call successors, (1804) [2022-03-20 17:28:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 11315 transitions. [2022-03-20 17:28:35,242 INFO L78 Accepts]: Start accepts. Automaton has 7477 states and 11315 transitions. Word has length 63 [2022-03-20 17:28:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:28:35,242 INFO L478 AbstractCegarLoop]: Abstraction has 7477 states and 11315 transitions. [2022-03-20 17:28:35,243 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) [2022-03-20 17:28:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7477 states and 11315 transitions. [2022-03-20 17:28:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:28:35,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:28:35,244 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:28:35,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 17:28:35,244 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:28:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:28:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -858477288, now seen corresponding path program 1 times [2022-03-20 17:28:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541891061] [2022-03-20 17:28:35,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:28:35,245 INFO L85 PathProgramCache]: Analyzing trace with hash -858477288, now seen corresponding path program 2 times [2022-03-20 17:28:35,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:28:35,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306726758] [2022-03-20 17:28:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:28:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:28:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:28:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:28:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:28:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:28:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:28:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 17:28:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:28:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:28:35,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306726758] [2022-03-20 17:28:35,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306726758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:35,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:35,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:28:35,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:28:35,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541891061] [2022-03-20 17:28:35,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541891061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:35,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:35,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:28:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302067844] [2022-03-20 17:28:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:28:35,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:28:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:28:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:28:35,688 INFO L87 Difference]: Start difference. First operand 7477 states and 11315 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) [2022-03-20 17:28:40,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:28:45,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:28:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:28:50,408 INFO L93 Difference]: Finished difference Result 15189 states and 23518 transitions. [2022-03-20 17:28:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:28:50,409 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 [2022-03-20 17:28:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:28:50,439 INFO L225 Difference]: With dead ends: 15189 [2022-03-20 17:28:50,439 INFO L226 Difference]: Without dead ends: 8787 [2022-03-20 17:28:50,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:28:50,464 INFO L913 BasicCegarLoop]: 709 mSDtfsCounter, 1515 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 3912 mSolverCounterSat, 647 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 4561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 3912 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:28:50,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 1398 Invalid, 4561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 3912 Invalid, 2 Unknown, 0 Unchecked, 11.9s Time] [2022-03-20 17:28:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2022-03-20 17:28:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 7633. [2022-03-20 17:28:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7633 states, 6047 states have (on average 1.4359186373408301) internal successors, (8683), 6229 states have internal predecessors, (8683), 1008 states have call successors, (1008), 475 states have call predecessors, (1008), 577 states have return successors, (1804), 964 states have call predecessors, (1804), 995 states have call successors, (1804) [2022-03-20 17:28:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 11495 transitions. [2022-03-20 17:28:52,045 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 11495 transitions. Word has length 61 [2022-03-20 17:28:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:28:52,045 INFO L478 AbstractCegarLoop]: Abstraction has 7633 states and 11495 transitions. [2022-03-20 17:28:52,045 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) [2022-03-20 17:28:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 11495 transitions. [2022-03-20 17:28:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 17:28:52,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:28:52,047 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] [2022-03-20 17:28:52,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 17:28:52,047 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:28:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:28:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1733980064, now seen corresponding path program 1 times [2022-03-20 17:28:52,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:52,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [659356729] [2022-03-20 17:28:52,047 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:28:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1733980064, now seen corresponding path program 2 times [2022-03-20 17:28:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:28:52,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569079457] [2022-03-20 17:28:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:28:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:28:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:28:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:28:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:28:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:28:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:28:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:28:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 17:28:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:28:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:28:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:28:52,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:28:52,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569079457] [2022-03-20 17:28:52,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569079457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:52,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:52,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:28:52,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:28:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [659356729] [2022-03-20 17:28:52,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [659356729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:28:52,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:28:52,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:28:52,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667660864] [2022-03-20 17:28:52,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:28:52,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:28:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:28:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:28:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:28:52,534 INFO L87 Difference]: Start difference. First operand 7633 states and 11495 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) [2022-03-20 17:29:00,354 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 [] [2022-03-20 17:29:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:29:05,306 INFO L93 Difference]: Finished difference Result 8715 states and 13445 transitions. [2022-03-20 17:29:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:29:05,307 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 [2022-03-20 17:29:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:29:05,334 INFO L225 Difference]: With dead ends: 8715 [2022-03-20 17:29:05,334 INFO L226 Difference]: Without dead ends: 8699 [2022-03-20 17:29:05,339 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 [2022-03-20 17:29:05,339 INFO L913 BasicCegarLoop]: 718 mSDtfsCounter, 1954 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 4563 mSolverCounterSat, 864 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 4563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:29:05,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 1733 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 4563 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-03-20 17:29:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2022-03-20 17:29:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 7639. [2022-03-20 17:29:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7639 states, 6050 states have (on average 1.4357024793388429) internal successors, (8686), 6235 states have internal predecessors, (8686), 1008 states have call successors, (1008), 475 states have call predecessors, (1008), 580 states have return successors, (1826), 964 states have call predecessors, (1826), 995 states have call successors, (1826) [2022-03-20 17:29:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7639 states to 7639 states and 11520 transitions. [2022-03-20 17:29:06,935 INFO L78 Accepts]: Start accepts. Automaton has 7639 states and 11520 transitions. Word has length 64 [2022-03-20 17:29:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:29:06,935 INFO L478 AbstractCegarLoop]: Abstraction has 7639 states and 11520 transitions. [2022-03-20 17:29:06,935 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) [2022-03-20 17:29:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7639 states and 11520 transitions. [2022-03-20 17:29:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:29:06,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:29:06,937 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:29:06,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:29:06,937 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:29:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:29:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 326599203, now seen corresponding path program 1 times [2022-03-20 17:29:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:06,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692747963] [2022-03-20 17:29:06,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:29:06,938 INFO L85 PathProgramCache]: Analyzing trace with hash 326599203, now seen corresponding path program 2 times [2022-03-20 17:29:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:29:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024995775] [2022-03-20 17:29:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:29:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:29:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:29:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:29:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:29:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:29:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:29:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:29:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 17:29:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:29:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:29:07,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:29:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024995775] [2022-03-20 17:29:07,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024995775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:07,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:07,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:07,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:29:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692747963] [2022-03-20 17:29:07,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692747963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:07,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:07,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140200168] [2022-03-20 17:29:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:29:07,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:29:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:29:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:29:07,490 INFO L87 Difference]: Start difference. First operand 7639 states and 11520 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), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 17:29:15,542 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 [] [2022-03-20 17:29:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:29:20,530 INFO L93 Difference]: Finished difference Result 8707 states and 13419 transitions. [2022-03-20 17:29:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:29:20,530 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), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 65 [2022-03-20 17:29:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:29:20,558 INFO L225 Difference]: With dead ends: 8707 [2022-03-20 17:29:20,558 INFO L226 Difference]: Without dead ends: 8687 [2022-03-20 17:29:20,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:29:20,563 INFO L913 BasicCegarLoop]: 727 mSDtfsCounter, 2003 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 4565 mSolverCounterSat, 877 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 5443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 4565 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:29:20,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2041 Valid, 1790 Invalid, 5443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 4565 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2022-03-20 17:29:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2022-03-20 17:29:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 7637. [2022-03-20 17:29:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7637 states, 6049 states have (on average 1.4356091916019176) internal successors, (8684), 6234 states have internal predecessors, (8684), 1007 states have call successors, (1007), 475 states have call predecessors, (1007), 580 states have return successors, (1825), 963 states have call predecessors, (1825), 994 states have call successors, (1825) [2022-03-20 17:29:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 11516 transitions. [2022-03-20 17:29:22,196 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 11516 transitions. Word has length 65 [2022-03-20 17:29:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:29:22,197 INFO L478 AbstractCegarLoop]: Abstraction has 7637 states and 11516 transitions. [2022-03-20 17:29:22,197 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), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 17:29:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 11516 transitions. [2022-03-20 17:29:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 17:29:22,198 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:29:22,198 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:29:22,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 17:29:22,199 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:29:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:29:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash -455424616, now seen corresponding path program 1 times [2022-03-20 17:29:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:22,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2065726793] [2022-03-20 17:29:22,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:29:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash -455424616, now seen corresponding path program 2 times [2022-03-20 17:29:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:29:22,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243925078] [2022-03-20 17:29:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:29:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:29:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:29:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:29:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:29:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:29:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:29:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:29:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 17:29:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:29:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:29:22,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:29:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243925078] [2022-03-20 17:29:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243925078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:22,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:22,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:29:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2065726793] [2022-03-20 17:29:22,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2065726793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:22,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:22,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:22,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184452637] [2022-03-20 17:29:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:29:22,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:29:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:29:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:29:22,784 INFO L87 Difference]: Start difference. First operand 7637 states and 11516 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 4 states have internal predecessors, (49), 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) [2022-03-20 17:29:28,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:30,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:32,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:34,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:36,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:41,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:29:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:29:46,713 INFO L93 Difference]: Finished difference Result 16296 states and 24880 transitions. [2022-03-20 17:29:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:29:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 4 states have internal predecessors, (49), 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 67 [2022-03-20 17:29:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:29:46,744 INFO L225 Difference]: With dead ends: 16296 [2022-03-20 17:29:46,744 INFO L226 Difference]: Without dead ends: 8687 [2022-03-20 17:29:46,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:29:46,774 INFO L913 BasicCegarLoop]: 712 mSDtfsCounter, 1816 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 819 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 5783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:29:46,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 1824 Invalid, 5783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 4958 Invalid, 6 Unknown, 0 Unchecked, 20.9s Time] [2022-03-20 17:29:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2022-03-20 17:29:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 7637. [2022-03-20 17:29:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7637 states, 6049 states have (on average 1.4354438750206646) internal successors, (8683), 6234 states have internal predecessors, (8683), 1007 states have call successors, (1007), 475 states have call predecessors, (1007), 580 states have return successors, (1825), 963 states have call predecessors, (1825), 994 states have call successors, (1825) [2022-03-20 17:29:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 11515 transitions. [2022-03-20 17:29:48,443 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 11515 transitions. Word has length 67 [2022-03-20 17:29:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:29:48,443 INFO L478 AbstractCegarLoop]: Abstraction has 7637 states and 11515 transitions. [2022-03-20 17:29:48,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 4 states have internal predecessors, (49), 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) [2022-03-20 17:29:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 11515 transitions. [2022-03-20 17:29:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 17:29:48,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:29:48,445 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:29:48,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 17:29:48,445 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:29:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:29:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2112328753, now seen corresponding path program 1 times [2022-03-20 17:29:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:48,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082419185] [2022-03-20 17:29:48,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:29:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2112328753, now seen corresponding path program 2 times [2022-03-20 17:29:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:29:48,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654955346] [2022-03-20 17:29:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:29:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:29:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:29:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:29:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:29:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:29:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:29:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:29:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:48,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 17:29:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:49,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:29:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:29:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:29:49,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:29:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654955346] [2022-03-20 17:29:49,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654955346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:49,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:49,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:49,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:29:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082419185] [2022-03-20 17:29:49,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082419185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:29:49,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:29:49,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:29:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312340518] [2022-03-20 17:29:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:29:49,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:29:49,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:29:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:29:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:29:49,043 INFO L87 Difference]: Start difference. First operand 7637 states and 11515 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) [2022-03-20 17:29:56,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:30:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:30:01,383 INFO L93 Difference]: Finished difference Result 8702 states and 13411 transitions. [2022-03-20 17:30:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:30:01,384 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 [2022-03-20 17:30:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:30:01,411 INFO L225 Difference]: With dead ends: 8702 [2022-03-20 17:30:01,411 INFO L226 Difference]: Without dead ends: 8682 [2022-03-20 17:30:01,416 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 [2022-03-20 17:30:01,416 INFO L913 BasicCegarLoop]: 723 mSDtfsCounter, 2280 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 1052 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 5284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:30:01,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 1879 Invalid, 5284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 4231 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-03-20 17:30:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2022-03-20 17:30:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 7632. [2022-03-20 17:30:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7632 states, 6046 states have (on average 1.4354945418458485) internal successors, (8679), 6231 states have internal predecessors, (8679), 1006 states have call successors, (1006), 475 states have call predecessors, (1006), 579 states have return successors, (1823), 961 states have call predecessors, (1823), 993 states have call successors, (1823) [2022-03-20 17:30:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7632 states to 7632 states and 11508 transitions. [2022-03-20 17:30:03,097 INFO L78 Accepts]: Start accepts. Automaton has 7632 states and 11508 transitions. Word has length 71 [2022-03-20 17:30:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:30:03,097 INFO L478 AbstractCegarLoop]: Abstraction has 7632 states and 11508 transitions. [2022-03-20 17:30:03,097 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) [2022-03-20 17:30:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 7632 states and 11508 transitions. [2022-03-20 17:30:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:30:03,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:30:03,099 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:30:03,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 17:30:03,099 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:30:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:30:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1256030660, now seen corresponding path program 1 times [2022-03-20 17:30:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163372530] [2022-03-20 17:30:03,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:30:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1256030660, now seen corresponding path program 2 times [2022-03-20 17:30:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:30:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935079255] [2022-03-20 17:30:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:30:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:30:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:30:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:30:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:30:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:30:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:30:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:30:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:30:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:30:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:30:03,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:30:03,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935079255] [2022-03-20 17:30:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935079255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:03,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:03,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:30:03,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:30:03,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163372530] [2022-03-20 17:30:03,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163372530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:03,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:03,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:30:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186977201] [2022-03-20 17:30:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:30:03,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:30:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:30:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:30:03,700 INFO L87 Difference]: Start difference. First operand 7632 states and 11508 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) [2022-03-20 17:30:10,023 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 [] [2022-03-20 17:30:16,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:30:22,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:30:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:30:31,497 INFO L93 Difference]: Finished difference Result 14564 states and 22493 transitions. [2022-03-20 17:30:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 17:30:31,497 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 [2022-03-20 17:30:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:30:31,529 INFO L225 Difference]: With dead ends: 14564 [2022-03-20 17:30:31,529 INFO L226 Difference]: Without dead ends: 10286 [2022-03-20 17:30:31,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=566, Invalid=2404, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 17:30:31,546 INFO L913 BasicCegarLoop]: 1101 mSDtfsCounter, 3789 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 8043 mSolverCounterSat, 2038 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 10084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2038 IncrementalHoareTripleChecker+Valid, 8043 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:30:31,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3797 Valid, 2404 Invalid, 10084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2038 Valid, 8043 Invalid, 3 Unknown, 0 Unchecked, 22.3s Time] [2022-03-20 17:30:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2022-03-20 17:30:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8242. [2022-03-20 17:30:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8242 states, 6535 states have (on average 1.434583014537108) internal successors, (9375), 6726 states have internal predecessors, (9375), 1073 states have call successors, (1073), 517 states have call predecessors, (1073), 633 states have return successors, (1965), 1033 states have call predecessors, (1965), 1059 states have call successors, (1965) [2022-03-20 17:30:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8242 states to 8242 states and 12413 transitions. [2022-03-20 17:30:33,546 INFO L78 Accepts]: Start accepts. Automaton has 8242 states and 12413 transitions. Word has length 72 [2022-03-20 17:30:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:30:33,546 INFO L478 AbstractCegarLoop]: Abstraction has 8242 states and 12413 transitions. [2022-03-20 17:30:33,546 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) [2022-03-20 17:30:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8242 states and 12413 transitions. [2022-03-20 17:30:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 17:30:33,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:30:33,548 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:30:33,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 17:30:33,548 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:30:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:30:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -26354390, now seen corresponding path program 1 times [2022-03-20 17:30:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288399416] [2022-03-20 17:30:33,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:30:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -26354390, now seen corresponding path program 2 times [2022-03-20 17:30:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:30:33,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394802987] [2022-03-20 17:30:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:30:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:30:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:30:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:30:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:30:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:30:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:30:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:30:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:30:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:34,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:30:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:30:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:30:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394802987] [2022-03-20 17:30:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394802987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:34,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:34,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:30:34,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:30:34,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288399416] [2022-03-20 17:30:34,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288399416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:34,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:34,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:30:34,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744248160] [2022-03-20 17:30:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:30:34,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:30:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:30:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:30:34,093 INFO L87 Difference]: Start difference. First operand 8242 states and 12413 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) [2022-03-20 17:30:43,834 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 [] [2022-03-20 17:30:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:30:50,315 INFO L93 Difference]: Finished difference Result 16692 states and 25780 transitions. [2022-03-20 17:30:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:30:50,316 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 [2022-03-20 17:30:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:30:50,346 INFO L225 Difference]: With dead ends: 16692 [2022-03-20 17:30:50,346 INFO L226 Difference]: Without dead ends: 9642 [2022-03-20 17:30:50,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:30:50,369 INFO L913 BasicCegarLoop]: 681 mSDtfsCounter, 1764 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 5316 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 6108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 5316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:30:50,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1799 Valid, 1760 Invalid, 6108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 5316 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2022-03-20 17:30:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9642 states. [2022-03-20 17:30:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9642 to 8322. [2022-03-20 17:30:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 6593 states have (on average 1.4307598968603064) internal successors, (9433), 6794 states have internal predecessors, (9433), 1073 states have call successors, (1073), 517 states have call predecessors, (1073), 655 states have return successors, (2032), 1045 states have call predecessors, (2032), 1059 states have call successors, (2032) [2022-03-20 17:30:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 12538 transitions. [2022-03-20 17:30:52,469 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 12538 transitions. Word has length 73 [2022-03-20 17:30:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:30:52,470 INFO L478 AbstractCegarLoop]: Abstraction has 8322 states and 12538 transitions. [2022-03-20 17:30:52,470 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) [2022-03-20 17:30:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 12538 transitions. [2022-03-20 17:30:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:30:52,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:30:52,472 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:30:52,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 17:30:52,472 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:30:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:30:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1359799553, now seen corresponding path program 1 times [2022-03-20 17:30:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304385702] [2022-03-20 17:30:52,473 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:30:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1359799553, now seen corresponding path program 2 times [2022-03-20 17:30:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:30:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193961974] [2022-03-20 17:30:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:30:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:30:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:52,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:30:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:52,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:30:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:52,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:30:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:30:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:53,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:30:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:30:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:30:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:53,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:30:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:30:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:30:53,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:30:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193961974] [2022-03-20 17:30:53,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193961974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:53,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:53,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:30:53,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:30:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304385702] [2022-03-20 17:30:53,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304385702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:30:53,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:30:53,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:30:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894881466] [2022-03-20 17:30:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:30:53,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:30:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:30:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:30:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:30:53,140 INFO L87 Difference]: Start difference. First operand 8322 states and 12538 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) [2022-03-20 17:31:01,086 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 [] [2022-03-20 17:31:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:31:06,947 INFO L93 Difference]: Finished difference Result 17616 states and 27205 transitions. [2022-03-20 17:31:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:31:06,947 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 [2022-03-20 17:31:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:31:06,980 INFO L225 Difference]: With dead ends: 17616 [2022-03-20 17:31:06,980 INFO L226 Difference]: Without dead ends: 9548 [2022-03-20 17:31:07,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:31:07,009 INFO L913 BasicCegarLoop]: 658 mSDtfsCounter, 2654 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 3057 mSolverCounterSat, 1134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 4192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 3057 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:31:07,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2705 Valid, 1301 Invalid, 4192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 3057 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-03-20 17:31:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9548 states. [2022-03-20 17:31:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9548 to 8341. [2022-03-20 17:31:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8341 states, 6612 states have (on average 1.4310344827586208) internal successors, (9462), 6813 states have internal predecessors, (9462), 1073 states have call successors, (1073), 517 states have call predecessors, (1073), 655 states have return successors, (2032), 1045 states have call predecessors, (2032), 1059 states have call successors, (2032) [2022-03-20 17:31:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8341 states to 8341 states and 12567 transitions. [2022-03-20 17:31:09,106 INFO L78 Accepts]: Start accepts. Automaton has 8341 states and 12567 transitions. Word has length 74 [2022-03-20 17:31:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:31:09,106 INFO L478 AbstractCegarLoop]: Abstraction has 8341 states and 12567 transitions. [2022-03-20 17:31:09,106 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) [2022-03-20 17:31:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8341 states and 12567 transitions. [2022-03-20 17:31:09,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:31:09,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:31:09,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:31:09,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 17:31:09,108 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:31:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:31:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 941023037, now seen corresponding path program 1 times [2022-03-20 17:31:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858926220] [2022-03-20 17:31:09,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:31:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash 941023037, now seen corresponding path program 2 times [2022-03-20 17:31:09,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:31:09,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984565853] [2022-03-20 17:31:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:31:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:31:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:31:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:31:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:31:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:31:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:31:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:31:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:31:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:31:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:31:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:31:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984565853] [2022-03-20 17:31:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984565853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:09,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:09,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:31:09,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:31:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858926220] [2022-03-20 17:31:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858926220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:09,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:09,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:31:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168353988] [2022-03-20 17:31:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:31:09,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:31:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:31:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:31:09,797 INFO L87 Difference]: Start difference. First operand 8341 states and 12567 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) [2022-03-20 17:31:16,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:31:18,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:31:24,411 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 [] [2022-03-20 17:31:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:31:31,188 INFO L93 Difference]: Finished difference Result 13651 states and 20845 transitions. [2022-03-20 17:31:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 17:31:31,188 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 [2022-03-20 17:31:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:31:31,214 INFO L225 Difference]: With dead ends: 13651 [2022-03-20 17:31:31,215 INFO L226 Difference]: Without dead ends: 9322 [2022-03-20 17:31:31,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:31:31,232 INFO L913 BasicCegarLoop]: 671 mSDtfsCounter, 2725 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 5175 mSolverCounterSat, 1124 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2755 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 6302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1124 IncrementalHoareTripleChecker+Valid, 5175 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:31:31,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2755 Valid, 1553 Invalid, 6302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1124 Valid, 5175 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2022-03-20 17:31:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2022-03-20 17:31:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 7543. [2022-03-20 17:31:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7543 states, 5980 states have (on average 1.4295986622073578) internal successors, (8549), 6169 states have internal predecessors, (8549), 970 states have call successors, (970), 471 states have call predecessors, (970), 592 states have return successors, (1659), 937 states have call predecessors, (1659), 956 states have call successors, (1659) [2022-03-20 17:31:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7543 states to 7543 states and 11178 transitions. [2022-03-20 17:31:33,231 INFO L78 Accepts]: Start accepts. Automaton has 7543 states and 11178 transitions. Word has length 74 [2022-03-20 17:31:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:31:33,231 INFO L478 AbstractCegarLoop]: Abstraction has 7543 states and 11178 transitions. [2022-03-20 17:31:33,231 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) [2022-03-20 17:31:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7543 states and 11178 transitions. [2022-03-20 17:31:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:31:33,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:31:33,233 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:31:33,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 17:31:33,233 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:31:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:31:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1087715839, now seen corresponding path program 1 times [2022-03-20 17:31:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:33,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64530755] [2022-03-20 17:31:33,235 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:31:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1087715839, now seen corresponding path program 2 times [2022-03-20 17:31:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:31:33,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659848521] [2022-03-20 17:31:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:31:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:31:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:31:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:31:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:31:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:31:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:31:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:31:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:31:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:31:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:31:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:31:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659848521] [2022-03-20 17:31:33,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659848521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:33,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:33,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:31:33,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:31:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64530755] [2022-03-20 17:31:33,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64530755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:33,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:33,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:31:33,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482554788] [2022-03-20 17:31:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:31:33,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:31:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:31:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:31:33,771 INFO L87 Difference]: Start difference. First operand 7543 states and 11178 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) [2022-03-20 17:31:39,484 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 [] [2022-03-20 17:31:45,067 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 [] [2022-03-20 17:31:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:31:56,204 INFO L93 Difference]: Finished difference Result 11702 states and 17816 transitions. [2022-03-20 17:31:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 17:31:56,206 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 [2022-03-20 17:31:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:31:56,232 INFO L225 Difference]: With dead ends: 11702 [2022-03-20 17:31:56,233 INFO L226 Difference]: Without dead ends: 11689 [2022-03-20 17:31:56,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:31:56,236 INFO L913 BasicCegarLoop]: 1151 mSDtfsCounter, 2428 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 5148 mSolverCounterSat, 1106 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 6256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 5148 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:31:56,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2475 Valid, 1983 Invalid, 6256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 5148 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2022-03-20 17:31:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11689 states. [2022-03-20 17:31:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11689 to 8174. [2022-03-20 17:31:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 6492 states have (on average 1.4322242760320394) internal successors, (9298), 6682 states have internal predecessors, (9298), 1039 states have call successors, (1039), 512 states have call predecessors, (1039), 642 states have return successors, (1773), 1015 states have call predecessors, (1773), 1025 states have call successors, (1773) [2022-03-20 17:31:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 12110 transitions. [2022-03-20 17:31:58,634 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 12110 transitions. Word has length 74 [2022-03-20 17:31:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:31:58,635 INFO L478 AbstractCegarLoop]: Abstraction has 8174 states and 12110 transitions. [2022-03-20 17:31:58,635 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) [2022-03-20 17:31:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 12110 transitions. [2022-03-20 17:31:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 17:31:58,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:31:58,636 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:31:58,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 17:31:58,636 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:31:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:31:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash -189949733, now seen corresponding path program 1 times [2022-03-20 17:31:58,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:58,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2141199621] [2022-03-20 17:31:58,637 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:31:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash -189949733, now seen corresponding path program 2 times [2022-03-20 17:31:58,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:31:58,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757930605] [2022-03-20 17:31:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:31:58,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:31:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:58,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:31:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:58,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:31:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:31:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:31:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:31:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:31:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:31:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:31:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:31:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:31:59,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:31:59,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757930605] [2022-03-20 17:31:59,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757930605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:59,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:31:59,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:31:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2141199621] [2022-03-20 17:31:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2141199621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:31:59,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:31:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:31:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603018293] [2022-03-20 17:31:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:31:59,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:31:59,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:31:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:31:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:31:59,207 INFO L87 Difference]: Start difference. First operand 8174 states and 12110 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) [2022-03-20 17:32:05,371 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 [] [2022-03-20 17:32:07,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:32:09,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:32:11,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:32:18,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:32:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:32:29,599 INFO L93 Difference]: Finished difference Result 10319 states and 15654 transitions. [2022-03-20 17:32:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 17:32:29,600 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 [2022-03-20 17:32:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:32:29,623 INFO L225 Difference]: With dead ends: 10319 [2022-03-20 17:32:29,624 INFO L226 Difference]: Without dead ends: 10315 [2022-03-20 17:32:29,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=557, Invalid=1893, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 17:32:29,628 INFO L913 BasicCegarLoop]: 1097 mSDtfsCounter, 4126 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 5231 mSolverCounterSat, 1999 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4167 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 7235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 5231 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:32:29,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4167 Valid, 2094 Invalid, 7235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1999 Valid, 5231 Invalid, 5 Unknown, 0 Unchecked, 23.2s Time] [2022-03-20 17:32:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2022-03-20 17:32:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 8176. [2022-03-20 17:32:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 6494 states have (on average 1.4320911610717586) internal successors, (9300), 6684 states have internal predecessors, (9300), 1039 states have call successors, (1039), 512 states have call predecessors, (1039), 642 states have return successors, (1773), 1015 states have call predecessors, (1773), 1025 states have call successors, (1773) [2022-03-20 17:32:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 12112 transitions. [2022-03-20 17:32:32,146 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 12112 transitions. Word has length 75 [2022-03-20 17:32:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:32:32,146 INFO L478 AbstractCegarLoop]: Abstraction has 8176 states and 12112 transitions. [2022-03-20 17:32:32,146 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) [2022-03-20 17:32:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 12112 transitions. [2022-03-20 17:32:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 17:32:32,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:32:32,148 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:32:32,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 17:32:32,148 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:32:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:32:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash -189672903, now seen corresponding path program 1 times [2022-03-20 17:32:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:32:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404954737] [2022-03-20 17:32:32,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:32:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash -189672903, now seen corresponding path program 2 times [2022-03-20 17:32:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:32:32,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081478540] [2022-03-20 17:32:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:32:32,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:32:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:32:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:32:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:32:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:32:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:32:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:32:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:32:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:32:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:32:32,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:32:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081478540] [2022-03-20 17:32:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081478540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:32:32,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:32:32,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:32:32,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:32:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404954737] [2022-03-20 17:32:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404954737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:32:32,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:32:32,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:32:32,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397840693] [2022-03-20 17:32:32,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:32:32,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:32:32,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:32:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:32:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:32:32,671 INFO L87 Difference]: Start difference. First operand 8176 states and 12112 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) [2022-03-20 17:32:43,313 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 [] [2022-03-20 17:32:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:32:50,919 INFO L93 Difference]: Finished difference Result 9304 states and 14131 transitions. [2022-03-20 17:32:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:32:50,920 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 [2022-03-20 17:32:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:32:50,941 INFO L225 Difference]: With dead ends: 9304 [2022-03-20 17:32:50,941 INFO L226 Difference]: Without dead ends: 9290 [2022-03-20 17:32:50,944 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 [2022-03-20 17:32:50,945 INFO L913 BasicCegarLoop]: 707 mSDtfsCounter, 1545 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 7529 mSolverCounterSat, 646 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 8176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 7529 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:32:50,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 2323 Invalid, 8176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 7529 Invalid, 1 Unknown, 0 Unchecked, 13.6s Time] [2022-03-20 17:32:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2022-03-20 17:32:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 8178. [2022-03-20 17:32:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8178 states, 6495 states have (on average 1.4320246343341032) internal successors, (9301), 6686 states have internal predecessors, (9301), 1039 states have call successors, (1039), 512 states have call predecessors, (1039), 643 states have return successors, (1789), 1015 states have call predecessors, (1789), 1025 states have call successors, (1789) [2022-03-20 17:32:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8178 states to 8178 states and 12129 transitions. [2022-03-20 17:32:53,495 INFO L78 Accepts]: Start accepts. Automaton has 8178 states and 12129 transitions. Word has length 75 [2022-03-20 17:32:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:32:53,495 INFO L478 AbstractCegarLoop]: Abstraction has 8178 states and 12129 transitions. [2022-03-20 17:32:53,495 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) [2022-03-20 17:32:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8178 states and 12129 transitions. [2022-03-20 17:32:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 17:32:53,496 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:32:53,497 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:32:53,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 17:32:53,497 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:32:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:32:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1279361975, now seen corresponding path program 1 times [2022-03-20 17:32:53,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:32:53,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [151872255] [2022-03-20 17:32:53,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:32:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1279361975, now seen corresponding path program 2 times [2022-03-20 17:32:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:32:53,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514371641] [2022-03-20 17:32:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:32:53,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:32:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:32:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:32:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:32:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:32:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:32:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:32:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 17:32:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:32:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:32:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:32:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:32:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514371641] [2022-03-20 17:32:54,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514371641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:32:54,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:32:54,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:32:54,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:32:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [151872255] [2022-03-20 17:32:54,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [151872255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:32:54,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:32:54,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:32:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414188607] [2022-03-20 17:32:54,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:32:54,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:32:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:32:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:32:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:32:54,020 INFO L87 Difference]: Start difference. First operand 8178 states and 12129 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) [2022-03-20 17:33:05,255 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 [] [2022-03-20 17:33:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:33:12,717 INFO L93 Difference]: Finished difference Result 9297 states and 14075 transitions. [2022-03-20 17:33:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:33:12,718 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 [2022-03-20 17:33:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:33:12,740 INFO L225 Difference]: With dead ends: 9297 [2022-03-20 17:33:12,740 INFO L226 Difference]: Without dead ends: 9244 [2022-03-20 17:33:12,743 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 [2022-03-20 17:33:12,743 INFO L913 BasicCegarLoop]: 700 mSDtfsCounter, 1953 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 6710 mSolverCounterSat, 844 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 6710 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:33:12,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 2146 Invalid, 7555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 6710 Invalid, 1 Unknown, 0 Unchecked, 14.1s Time] [2022-03-20 17:33:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2022-03-20 17:33:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 8141. [2022-03-20 17:33:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8141 states, 6463 states have (on average 1.4324617050905153) internal successors, (9258), 6654 states have internal predecessors, (9258), 1036 states have call successors, (1036), 510 states have call predecessors, (1036), 641 states have return successors, (1785), 1012 states have call predecessors, (1785), 1022 states have call successors, (1785) [2022-03-20 17:33:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 12079 transitions. [2022-03-20 17:33:15,343 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 12079 transitions. Word has length 75 [2022-03-20 17:33:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:33:15,343 INFO L478 AbstractCegarLoop]: Abstraction has 8141 states and 12079 transitions. [2022-03-20 17:33:15,343 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) [2022-03-20 17:33:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 12079 transitions. [2022-03-20 17:33:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 17:33:15,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:33:15,345 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:33:15,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 17:33:15,345 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:33:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:33:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1573546191, now seen corresponding path program 1 times [2022-03-20 17:33:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:33:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989951] [2022-03-20 17:33:15,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:33:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1573546191, now seen corresponding path program 2 times [2022-03-20 17:33:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:33:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305837480] [2022-03-20 17:33:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:33:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:33:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:33:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:33:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:33:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:33:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:33:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:33:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:33:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 17:33:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:33:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:33:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:33:15,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:33:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305837480] [2022-03-20 17:33:15,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305837480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:33:15,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:33:15,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:33:15,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:33:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989951] [2022-03-20 17:33:15,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:33:15,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:33:15,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:33:15,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686306078] [2022-03-20 17:33:15,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:33:15,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:33:15,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:33:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:33:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:33:15,791 INFO L87 Difference]: Start difference. First operand 8141 states and 12079 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) [2022-03-20 17:33:20,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:22,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:24,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:28,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:33,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:36,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:33:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:33:42,581 INFO L93 Difference]: Finished difference Result 13028 states and 19595 transitions. [2022-03-20 17:33:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:33:42,581 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 [2022-03-20 17:33:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:33:42,601 INFO L225 Difference]: With dead ends: 13028 [2022-03-20 17:33:42,601 INFO L226 Difference]: Without dead ends: 9114 [2022-03-20 17:33:42,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:33:42,612 INFO L913 BasicCegarLoop]: 1110 mSDtfsCounter, 2447 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 1110 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2500 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:33:42,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2500 Valid, 1772 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 3652 Invalid, 6 Unknown, 0 Unchecked, 21.6s Time] [2022-03-20 17:33:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2022-03-20 17:33:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 7494. [2022-03-20 17:33:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 5938 states have (on average 1.4292691141798586) internal successors, (8487), 6124 states have internal predecessors, (8487), 963 states have call successors, (963), 469 states have call predecessors, (963), 592 states have return successors, (1562), 932 states have call predecessors, (1562), 941 states have call successors, (1562) [2022-03-20 17:33:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 11012 transitions. [2022-03-20 17:33:45,136 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 11012 transitions. Word has length 78 [2022-03-20 17:33:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:33:45,136 INFO L478 AbstractCegarLoop]: Abstraction has 7494 states and 11012 transitions. [2022-03-20 17:33:45,136 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) [2022-03-20 17:33:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 11012 transitions. [2022-03-20 17:33:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 17:33:45,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:33:45,138 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:33:45,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 17:33:45,138 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:33:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:33:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1608608426, now seen corresponding path program 1 times [2022-03-20 17:33:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:33:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1079525581] [2022-03-20 17:33:45,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:33:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1608608426, now seen corresponding path program 2 times [2022-03-20 17:33:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:33:45,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476920313] [2022-03-20 17:33:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:33:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:33:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:33:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:33:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:33:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:33:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:33:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:33:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:33:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:33:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 17:33:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:33:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:33:45,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:33:45,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476920313] [2022-03-20 17:33:45,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476920313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:33:45,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:33:45,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:33:45,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:33:45,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1079525581] [2022-03-20 17:33:45,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1079525581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:33:45,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:33:45,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:33:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100413194] [2022-03-20 17:33:45,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:33:45,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:33:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:33:45,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:33:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:33:45,657 INFO L87 Difference]: Start difference. First operand 7494 states and 11012 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) [2022-03-20 17:33:52,565 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 [] [2022-03-20 17:33:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:33:58,352 INFO L93 Difference]: Finished difference Result 14828 states and 22189 transitions. [2022-03-20 17:33:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:33:58,352 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 [2022-03-20 17:33:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:33:58,371 INFO L225 Difference]: With dead ends: 14828 [2022-03-20 17:33:58,371 INFO L226 Difference]: Without dead ends: 8502 [2022-03-20 17:33:58,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:33:58,385 INFO L913 BasicCegarLoop]: 660 mSDtfsCounter, 2042 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:33:58,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 1170 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 2220 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-03-20 17:33:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8502 states. [2022-03-20 17:34:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8502 to 7452. [2022-03-20 17:34:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 5892 states have (on average 1.4285471826205023) internal successors, (8417), 6096 states have internal predecessors, (8417), 967 states have call successors, (967), 469 states have call predecessors, (967), 592 states have return successors, (1566), 918 states have call predecessors, (1566), 945 states have call successors, (1566) [2022-03-20 17:34:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 10950 transitions. [2022-03-20 17:34:01,022 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 10950 transitions. Word has length 79 [2022-03-20 17:34:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:34:01,022 INFO L478 AbstractCegarLoop]: Abstraction has 7452 states and 10950 transitions. [2022-03-20 17:34:01,022 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) [2022-03-20 17:34:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 10950 transitions. [2022-03-20 17:34:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 17:34:01,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:34:01,024 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] [2022-03-20 17:34:01,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 17:34:01,025 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:34:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:34:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash -697853230, now seen corresponding path program 1 times [2022-03-20 17:34:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333712422] [2022-03-20 17:34:01,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:34:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash -697853230, now seen corresponding path program 2 times [2022-03-20 17:34:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:34:01,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735152990] [2022-03-20 17:34:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:34:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:34:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:34:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:34:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:34:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:34:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:34:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:34:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:34:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:34:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:34:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:34:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735152990] [2022-03-20 17:34:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735152990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:01,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:01,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:34:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333712422] [2022-03-20 17:34:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333712422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:01,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036400965] [2022-03-20 17:34:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:34:01,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:34:01,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:34:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:34:01,512 INFO L87 Difference]: Start difference. First operand 7452 states and 10950 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) [2022-03-20 17:34:09,759 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 [] [2022-03-20 17:34:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:34:16,248 INFO L93 Difference]: Finished difference Result 11678 states and 17536 transitions. [2022-03-20 17:34:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:34:16,249 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 [2022-03-20 17:34:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:34:16,269 INFO L225 Difference]: With dead ends: 11678 [2022-03-20 17:34:16,269 INFO L226 Difference]: Without dead ends: 8716 [2022-03-20 17:34:16,278 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 [2022-03-20 17:34:16,279 INFO L913 BasicCegarLoop]: 656 mSDtfsCounter, 1748 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 3188 mSolverCounterSat, 818 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 3188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:34:16,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1781 Valid, 1354 Invalid, 4007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 3188 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-03-20 17:34:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8716 states. [2022-03-20 17:34:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8716 to 7652. [2022-03-20 17:34:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7652 states, 6092 states have (on average 1.4276099803020355) internal successors, (8697), 6296 states have internal predecessors, (8697), 967 states have call successors, (967), 469 states have call predecessors, (967), 592 states have return successors, (1566), 918 states have call predecessors, (1566), 945 states have call successors, (1566) [2022-03-20 17:34:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7652 states to 7652 states and 11230 transitions. [2022-03-20 17:34:18,992 INFO L78 Accepts]: Start accepts. Automaton has 7652 states and 11230 transitions. Word has length 80 [2022-03-20 17:34:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:34:18,992 INFO L478 AbstractCegarLoop]: Abstraction has 7652 states and 11230 transitions. [2022-03-20 17:34:18,993 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) [2022-03-20 17:34:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7652 states and 11230 transitions. [2022-03-20 17:34:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 17:34:18,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:34:18,994 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] [2022-03-20 17:34:18,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 17:34:18,994 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:34:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:34:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash -192162812, now seen corresponding path program 1 times [2022-03-20 17:34:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1518765786] [2022-03-20 17:34:18,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:34:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash -192162812, now seen corresponding path program 2 times [2022-03-20 17:34:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:34:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329080090] [2022-03-20 17:34:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:34:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:34:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:34:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:34:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:34:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:34:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:34:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:34:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 17:34:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 17:34:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 17:34:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:34:19,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:34:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329080090] [2022-03-20 17:34:19,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329080090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:19,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:19,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:19,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:34:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1518765786] [2022-03-20 17:34:19,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1518765786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:19,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:19,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848446931] [2022-03-20 17:34:19,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:34:19,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:34:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:34:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:34:19,427 INFO L87 Difference]: Start difference. First operand 7652 states and 11230 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) [2022-03-20 17:34:26,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:34:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:34:36,913 INFO L93 Difference]: Finished difference Result 10659 states and 15722 transitions. [2022-03-20 17:34:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 17:34:36,913 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 [2022-03-20 17:34:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:34:36,929 INFO L225 Difference]: With dead ends: 10659 [2022-03-20 17:34:36,929 INFO L226 Difference]: Without dead ends: 6505 [2022-03-20 17:34:36,939 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 [2022-03-20 17:34:36,939 INFO L913 BasicCegarLoop]: 979 mSDtfsCounter, 4705 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 4366 mSolverCounterSat, 1856 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4756 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 6223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1856 IncrementalHoareTripleChecker+Valid, 4366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:34:36,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4756 Valid, 1779 Invalid, 6223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1856 Valid, 4366 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2022-03-20 17:34:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2022-03-20 17:34:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 5514. [2022-03-20 17:34:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 4422 states have (on average 1.4194934418815015) internal successors, (6277), 4539 states have internal predecessors, (6277), 672 states have call successors, (672), 347 states have call predecessors, (672), 419 states have return successors, (910), 649 states have call predecessors, (910), 654 states have call successors, (910) [2022-03-20 17:34:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 7859 transitions. [2022-03-20 17:34:39,006 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 7859 transitions. Word has length 84 [2022-03-20 17:34:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:34:39,006 INFO L478 AbstractCegarLoop]: Abstraction has 5514 states and 7859 transitions. [2022-03-20 17:34:39,006 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) [2022-03-20 17:34:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 7859 transitions. [2022-03-20 17:34:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:34:39,007 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:34:39,007 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:34:39,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 17:34:39,007 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:34:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:34:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1582799931, now seen corresponding path program 1 times [2022-03-20 17:34:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1328112737] [2022-03-20 17:34:39,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:34:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1582799931, now seen corresponding path program 2 times [2022-03-20 17:34:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:34:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478168625] [2022-03-20 17:34:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:34:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:34:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:34:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:34:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:34:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:34:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:34:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:34:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:34:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:34:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:34:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:34:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478168625] [2022-03-20 17:34:39,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478168625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:39,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:39,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:39,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:34:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1328112737] [2022-03-20 17:34:39,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1328112737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:39,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:39,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:34:39,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003048459] [2022-03-20 17:34:39,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:34:39,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:34:39,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:34:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:34:39,491 INFO L87 Difference]: Start difference. First operand 5514 states and 7859 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) [2022-03-20 17:34:47,966 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 [] [2022-03-20 17:34:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:34:54,260 INFO L93 Difference]: Finished difference Result 9386 states and 13609 transitions. [2022-03-20 17:34:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:34:54,261 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 [2022-03-20 17:34:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:34:54,275 INFO L225 Difference]: With dead ends: 9386 [2022-03-20 17:34:54,275 INFO L226 Difference]: Without dead ends: 6493 [2022-03-20 17:34:54,281 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 [2022-03-20 17:34:54,282 INFO L913 BasicCegarLoop]: 668 mSDtfsCounter, 1434 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 3456 mSolverCounterSat, 595 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 4052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:34:54,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1385 Invalid, 4052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3456 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2022-03-20 17:34:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6493 states. [2022-03-20 17:34:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6493 to 5470. [2022-03-20 17:34:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5470 states, 4378 states have (on average 1.42188213796254) internal successors, (6225), 4495 states have internal predecessors, (6225), 672 states have call successors, (672), 347 states have call predecessors, (672), 419 states have return successors, (910), 649 states have call predecessors, (910), 654 states have call successors, (910) [2022-03-20 17:34:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 7807 transitions. [2022-03-20 17:34:56,362 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 7807 transitions. Word has length 81 [2022-03-20 17:34:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:34:56,362 INFO L478 AbstractCegarLoop]: Abstraction has 5470 states and 7807 transitions. [2022-03-20 17:34:56,362 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) [2022-03-20 17:34:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 7807 transitions. [2022-03-20 17:34:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:34:56,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:34:56,364 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:34:56,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 17:34:56,364 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:34:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:34:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1178730404, now seen corresponding path program 1 times [2022-03-20 17:34:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:56,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126313062] [2022-03-20 17:34:56,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:34:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1178730404, now seen corresponding path program 2 times [2022-03-20 17:34:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:34:56,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100386046] [2022-03-20 17:34:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:34:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:34:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:34:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:34:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:34:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:34:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:34:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:34:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:34:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:57,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:34:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:34:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:34:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:34:57,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100386046] [2022-03-20 17:34:57,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100386046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:57,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:57,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:34:57,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:34:57,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126313062] [2022-03-20 17:34:57,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126313062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:34:57,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:34:57,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:34:57,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422651186] [2022-03-20 17:34:57,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:34:57,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:34:57,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:34:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:34:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:34:57,054 INFO L87 Difference]: Start difference. First operand 5470 states and 7807 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) [2022-03-20 17:35:05,819 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 [] [2022-03-20 17:35:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:35:11,702 INFO L93 Difference]: Finished difference Result 6392 states and 9330 transitions. [2022-03-20 17:35:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:35:11,702 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 [2022-03-20 17:35:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:35:11,712 INFO L225 Difference]: With dead ends: 6392 [2022-03-20 17:35:11,713 INFO L226 Difference]: Without dead ends: 6372 [2022-03-20 17:35:11,714 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 [2022-03-20 17:35:11,714 INFO L913 BasicCegarLoop]: 665 mSDtfsCounter, 2122 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 6290 mSolverCounterSat, 963 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 7254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 6290 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:35:11,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2161 Valid, 2089 Invalid, 7254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 6290 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-03-20 17:35:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6372 states. [2022-03-20 17:35:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6372 to 5466. [2022-03-20 17:35:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 4375 states have (on average 1.4219428571428572) internal successors, (6221), 4492 states have internal predecessors, (6221), 671 states have call successors, (671), 347 states have call predecessors, (671), 419 states have return successors, (909), 648 states have call predecessors, (909), 653 states have call successors, (909) [2022-03-20 17:35:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 7801 transitions. [2022-03-20 17:35:13,739 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 7801 transitions. Word has length 81 [2022-03-20 17:35:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:35:13,739 INFO L478 AbstractCegarLoop]: Abstraction has 5466 states and 7801 transitions. [2022-03-20 17:35:13,739 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) [2022-03-20 17:35:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 7801 transitions. [2022-03-20 17:35:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 17:35:13,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:35:13,740 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] [2022-03-20 17:35:13,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 17:35:13,741 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:35:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:35:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1957637781, now seen corresponding path program 1 times [2022-03-20 17:35:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:13,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191280943] [2022-03-20 17:35:13,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:35:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1957637781, now seen corresponding path program 2 times [2022-03-20 17:35:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:35:13,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791268180] [2022-03-20 17:35:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:35:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:35:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:13,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:35:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:35:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:35:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:35:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:35:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:35:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:35:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:35:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:35:14,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:35:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791268180] [2022-03-20 17:35:14,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791268180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:14,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:14,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:35:14,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:35:14,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191280943] [2022-03-20 17:35:14,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191280943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:14,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:14,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:35:14,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486531183] [2022-03-20 17:35:14,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:35:14,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:35:14,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:35:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:35:14,225 INFO L87 Difference]: Start difference. First operand 5466 states and 7801 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) [2022-03-20 17:35:23,181 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 [] [2022-03-20 17:35:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:35:29,024 INFO L93 Difference]: Finished difference Result 6465 states and 9486 transitions. [2022-03-20 17:35:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:35:29,024 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 [2022-03-20 17:35:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:35:29,035 INFO L225 Difference]: With dead ends: 6465 [2022-03-20 17:35:29,036 INFO L226 Difference]: Without dead ends: 6449 [2022-03-20 17:35:29,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:35:29,037 INFO L913 BasicCegarLoop]: 665 mSDtfsCounter, 2161 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 945 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 5602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:35:29,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2199 Valid, 1827 Invalid, 5602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 4656 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-03-20 17:35:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2022-03-20 17:35:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 5471. [2022-03-20 17:35:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 4378 states have (on average 1.4221105527638191) internal successors, (6226), 4496 states have internal predecessors, (6226), 673 states have call successors, (673), 347 states have call predecessors, (673), 419 states have return successors, (911), 649 states have call predecessors, (911), 655 states have call successors, (911) [2022-03-20 17:35:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 7810 transitions. [2022-03-20 17:35:31,139 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 7810 transitions. Word has length 82 [2022-03-20 17:35:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:35:31,139 INFO L478 AbstractCegarLoop]: Abstraction has 5471 states and 7810 transitions. [2022-03-20 17:35:31,139 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) [2022-03-20 17:35:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 7810 transitions. [2022-03-20 17:35:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 17:35:31,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:35:31,140 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] [2022-03-20 17:35:31,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 17:35:31,141 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:35:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:35:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1156094369, now seen corresponding path program 1 times [2022-03-20 17:35:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827961938] [2022-03-20 17:35:31,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:35:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1156094369, now seen corresponding path program 2 times [2022-03-20 17:35:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:35:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271457902] [2022-03-20 17:35:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:35:31,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:35:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:35:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:35:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:35:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:35:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:35:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:35:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:35:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:35:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 17:35:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:35:31,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:35:31,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271457902] [2022-03-20 17:35:31,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271457902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:31,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:31,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:35:31,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:35:31,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827961938] [2022-03-20 17:35:31,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827961938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:31,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:31,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:35:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956849850] [2022-03-20 17:35:31,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:35:31,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:35:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:35:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:35:31,633 INFO L87 Difference]: Start difference. First operand 5471 states and 7810 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 11 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:35:40,330 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 [] [2022-03-20 17:35:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:35:45,989 INFO L93 Difference]: Finished difference Result 9470 states and 13860 transitions. [2022-03-20 17:35:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:35:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 11 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-03-20 17:35:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:35:46,001 INFO L225 Difference]: With dead ends: 9470 [2022-03-20 17:35:46,001 INFO L226 Difference]: Without dead ends: 6608 [2022-03-20 17:35:46,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:35:46,005 INFO L913 BasicCegarLoop]: 654 mSDtfsCounter, 2890 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 4058 mSolverCounterSat, 1339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2923 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 5398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 4058 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:35:46,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2923 Valid, 1584 Invalid, 5398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 4058 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-03-20 17:35:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2022-03-20 17:35:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 5465. [2022-03-20 17:35:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 4372 states have (on average 1.4226898444647758) internal successors, (6220), 4490 states have internal predecessors, (6220), 673 states have call successors, (673), 347 states have call predecessors, (673), 419 states have return successors, (911), 649 states have call predecessors, (911), 655 states have call successors, (911) [2022-03-20 17:35:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 7804 transitions. [2022-03-20 17:35:48,087 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 7804 transitions. Word has length 84 [2022-03-20 17:35:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:35:48,087 INFO L478 AbstractCegarLoop]: Abstraction has 5465 states and 7804 transitions. [2022-03-20 17:35:48,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 11 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:35:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 7804 transitions. [2022-03-20 17:35:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:35:48,088 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:35:48,088 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:35:48,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 17:35:48,089 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:35:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:35:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -252551860, now seen corresponding path program 1 times [2022-03-20 17:35:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857480339] [2022-03-20 17:35:48,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:35:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -252551860, now seen corresponding path program 2 times [2022-03-20 17:35:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:35:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789346100] [2022-03-20 17:35:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:35:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:35:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:35:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:35:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:35:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:35:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:35:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:35:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:35:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 17:35:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:35:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:35:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:35:48,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789346100] [2022-03-20 17:35:48,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789346100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:48,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:48,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:35:48,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:35:48,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857480339] [2022-03-20 17:35:48,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857480339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:35:48,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:35:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:35:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623269732] [2022-03-20 17:35:48,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:35:48,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:35:48,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:35:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:35:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:35:48,580 INFO L87 Difference]: Start difference. First operand 5465 states and 7804 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) [2022-03-20 17:35:55,881 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 [] [2022-03-20 17:36:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:36:01,446 INFO L93 Difference]: Finished difference Result 11441 states and 16746 transitions. [2022-03-20 17:36:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:36:01,447 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 [2022-03-20 17:36:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:36:01,462 INFO L225 Difference]: With dead ends: 11441 [2022-03-20 17:36:01,462 INFO L226 Difference]: Without dead ends: 6534 [2022-03-20 17:36:01,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:36:01,470 INFO L913 BasicCegarLoop]: 648 mSDtfsCounter, 2348 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3631 mSolverCounterSat, 1046 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 4678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1046 IncrementalHoareTripleChecker+Valid, 3631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:36:01,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2382 Valid, 1501 Invalid, 4678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1046 Valid, 3631 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-03-20 17:36:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-03-20 17:36:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5477. [2022-03-20 17:36:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 4384 states have (on average 1.4215328467153285) internal successors, (6232), 4490 states have internal predecessors, (6232), 673 states have call successors, (673), 347 states have call predecessors, (673), 419 states have return successors, (911), 661 states have call predecessors, (911), 655 states have call successors, (911) [2022-03-20 17:36:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 7816 transitions. [2022-03-20 17:36:03,630 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 7816 transitions. Word has length 83 [2022-03-20 17:36:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:36:03,631 INFO L478 AbstractCegarLoop]: Abstraction has 5477 states and 7816 transitions. [2022-03-20 17:36:03,631 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) [2022-03-20 17:36:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 7816 transitions. [2022-03-20 17:36:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 17:36:03,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:36:03,632 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:36:03,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 17:36:03,632 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:36:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:36:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 5334329, now seen corresponding path program 1 times [2022-03-20 17:36:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:03,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103150558] [2022-03-20 17:36:03,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:36:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 5334329, now seen corresponding path program 2 times [2022-03-20 17:36:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:36:03,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492748312] [2022-03-20 17:36:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:36:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:36:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:36:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:36:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:03,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:36:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:36:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:36:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:04,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:36:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:36:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:36:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:04,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:36:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:36:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:36:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492748312] [2022-03-20 17:36:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492748312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:04,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:04,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:36:04,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:36:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103150558] [2022-03-20 17:36:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103150558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:04,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:04,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:36:04,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109437422] [2022-03-20 17:36:04,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:36:04,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:36:04,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:04,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:36:04,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:36:04,134 INFO L87 Difference]: Start difference. First operand 5477 states and 7816 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) [2022-03-20 17:36:10,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:36:12,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:36:17,015 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 [] [2022-03-20 17:36:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:36:23,263 INFO L93 Difference]: Finished difference Result 6409 states and 9350 transitions. [2022-03-20 17:36:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:36:23,263 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 [2022-03-20 17:36:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:36:23,276 INFO L225 Difference]: With dead ends: 6409 [2022-03-20 17:36:23,276 INFO L226 Difference]: Without dead ends: 6387 [2022-03-20 17:36:23,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:36:23,278 INFO L913 BasicCegarLoop]: 666 mSDtfsCounter, 2172 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 919 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2210 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 6306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:36:23,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2210 Valid, 1871 Invalid, 6306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 5384 Invalid, 3 Unknown, 0 Unchecked, 15.0s Time] [2022-03-20 17:36:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2022-03-20 17:36:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 5476. [2022-03-20 17:36:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 4384 states have (on average 1.4213047445255473) internal successors, (6231), 4489 states have internal predecessors, (6231), 672 states have call successors, (672), 347 states have call predecessors, (672), 419 states have return successors, (910), 661 states have call predecessors, (910), 654 states have call successors, (910) [2022-03-20 17:36:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 7813 transitions. [2022-03-20 17:36:25,454 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 7813 transitions. Word has length 84 [2022-03-20 17:36:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:36:25,454 INFO L478 AbstractCegarLoop]: Abstraction has 5476 states and 7813 transitions. [2022-03-20 17:36:25,454 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) [2022-03-20 17:36:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 7813 transitions. [2022-03-20 17:36:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 17:36:25,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:36:25,455 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] [2022-03-20 17:36:25,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 17:36:25,456 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:36:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:36:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 174205264, now seen corresponding path program 1 times [2022-03-20 17:36:25,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:25,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039532046] [2022-03-20 17:36:25,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:36:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 174205264, now seen corresponding path program 2 times [2022-03-20 17:36:25,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:36:25,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991061830] [2022-03-20 17:36:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:36:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:36:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:36:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:36:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:36:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:36:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:36:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:36:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:36:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 17:36:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:36:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:36:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991061830] [2022-03-20 17:36:25,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991061830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:25,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:25,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:36:25,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:36:25,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039532046] [2022-03-20 17:36:25,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039532046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:25,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:25,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:36:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690111181] [2022-03-20 17:36:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:36:25,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:36:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:36:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:36:25,834 INFO L87 Difference]: Start difference. First operand 5476 states and 7813 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-03-20 17:36:32,142 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 [] [2022-03-20 17:36:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:36:37,976 INFO L93 Difference]: Finished difference Result 9560 states and 13887 transitions. [2022-03-20 17:36:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:36:37,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 3 states have internal predecessors, (66), 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 84 [2022-03-20 17:36:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:36:37,990 INFO L225 Difference]: With dead ends: 9560 [2022-03-20 17:36:37,990 INFO L226 Difference]: Without dead ends: 6699 [2022-03-20 17:36:37,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:36:37,995 INFO L913 BasicCegarLoop]: 650 mSDtfsCounter, 1758 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 3125 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 3125 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:36:37,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1795 Valid, 1358 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 3125 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-03-20 17:36:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6699 states. [2022-03-20 17:36:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6699 to 5536. [2022-03-20 17:36:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5536 states, 4444 states have (on average 1.4156165616561656) internal successors, (6291), 4549 states have internal predecessors, (6291), 672 states have call successors, (672), 347 states have call predecessors, (672), 419 states have return successors, (910), 661 states have call predecessors, (910), 654 states have call successors, (910) [2022-03-20 17:36:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5536 states to 5536 states and 7873 transitions. [2022-03-20 17:36:40,324 INFO L78 Accepts]: Start accepts. Automaton has 5536 states and 7873 transitions. Word has length 84 [2022-03-20 17:36:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:36:40,324 INFO L478 AbstractCegarLoop]: Abstraction has 5536 states and 7873 transitions. [2022-03-20 17:36:40,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-03-20 17:36:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5536 states and 7873 transitions. [2022-03-20 17:36:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 17:36:40,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:36:40,325 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] [2022-03-20 17:36:40,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 17:36:40,325 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:36:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:36:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash -848816393, now seen corresponding path program 1 times [2022-03-20 17:36:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329052126] [2022-03-20 17:36:40,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:36:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash -848816393, now seen corresponding path program 2 times [2022-03-20 17:36:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:36:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370631598] [2022-03-20 17:36:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:36:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:36:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:36:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:36:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:36:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:36:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:36:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:36:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 17:36:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 17:36:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 17:36:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:36:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-20 17:36:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:36:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:36:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370631598] [2022-03-20 17:36:40,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370631598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:40,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:40,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:36:40,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:36:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329052126] [2022-03-20 17:36:40,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329052126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:40,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:40,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:36:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010999] [2022-03-20 17:36:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:36:40,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:36:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:36:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:36:40,693 INFO L87 Difference]: Start difference. First operand 5536 states and 7873 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) [2022-03-20 17:36:45,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:36:49,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:36:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:36:55,587 INFO L93 Difference]: Finished difference Result 9783 states and 14172 transitions. [2022-03-20 17:36:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 17:36:55,587 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 [2022-03-20 17:36:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:36:55,603 INFO L225 Difference]: With dead ends: 9783 [2022-03-20 17:36:55,603 INFO L226 Difference]: Without dead ends: 6467 [2022-03-20 17:36:55,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:36:55,609 INFO L913 BasicCegarLoop]: 638 mSDtfsCounter, 1954 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 912 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 3942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:36:55,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 1435 Invalid, 3942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 3028 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2022-03-20 17:36:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6467 states. [2022-03-20 17:36:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6467 to 5505. [2022-03-20 17:36:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4421 states have (on average 1.4159692377290205) internal successors, (6260), 4524 states have internal predecessors, (6260), 669 states have call successors, (669), 345 states have call predecessors, (669), 414 states have return successors, (888), 657 states have call predecessors, (888), 651 states have call successors, (888) [2022-03-20 17:36:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 7817 transitions. [2022-03-20 17:36:57,878 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 7817 transitions. Word has length 90 [2022-03-20 17:36:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:36:57,879 INFO L478 AbstractCegarLoop]: Abstraction has 5505 states and 7817 transitions. [2022-03-20 17:36:57,879 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) [2022-03-20 17:36:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 7817 transitions. [2022-03-20 17:36:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 17:36:57,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:36:57,880 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] [2022-03-20 17:36:57,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 17:36:57,880 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:36:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:36:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1334190776, now seen corresponding path program 1 times [2022-03-20 17:36:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977493130] [2022-03-20 17:36:57,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:36:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1334190776, now seen corresponding path program 2 times [2022-03-20 17:36:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:36:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996828041] [2022-03-20 17:36:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:36:57,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:36:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:36:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:36:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:36:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:36:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:36:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:36:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:36:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:36:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:36:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:36:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:36:58,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:36:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996828041] [2022-03-20 17:36:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996828041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:58,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:36:58,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:36:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977493130] [2022-03-20 17:36:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977493130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:36:58,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:36:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:36:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193898874] [2022-03-20 17:36:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:36:58,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:36:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:36:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:36:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:36:58,350 INFO L87 Difference]: Start difference. First operand 5505 states and 7817 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) [2022-03-20 17:37:07,638 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 [] [2022-03-20 17:37:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:37:14,007 INFO L93 Difference]: Finished difference Result 11488 states and 16729 transitions. [2022-03-20 17:37:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:37:14,008 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 [2022-03-20 17:37:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:37:14,026 INFO L225 Difference]: With dead ends: 11488 [2022-03-20 17:37:14,026 INFO L226 Difference]: Without dead ends: 6490 [2022-03-20 17:37:14,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:37:14,035 INFO L913 BasicCegarLoop]: 636 mSDtfsCounter, 1532 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 658 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:37:14,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 1582 Invalid, 5442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 4783 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-03-20 17:37:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2022-03-20 17:37:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5565. [2022-03-20 17:37:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 4466 states have (on average 1.4117778772951186) internal successors, (6305), 4569 states have internal predecessors, (6305), 669 states have call successors, (669), 345 states have call predecessors, (669), 429 states have return successors, (903), 672 states have call predecessors, (903), 651 states have call successors, (903) [2022-03-20 17:37:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 7877 transitions. [2022-03-20 17:37:16,401 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 7877 transitions. Word has length 86 [2022-03-20 17:37:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:37:16,402 INFO L478 AbstractCegarLoop]: Abstraction has 5565 states and 7877 transitions. [2022-03-20 17:37:16,402 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) [2022-03-20 17:37:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 7877 transitions. [2022-03-20 17:37:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 17:37:16,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:37:16,403 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:37:16,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 17:37:16,403 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:37:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:37:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -680978953, now seen corresponding path program 1 times [2022-03-20 17:37:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:37:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063068051] [2022-03-20 17:37:16,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:37:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -680978953, now seen corresponding path program 2 times [2022-03-20 17:37:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:37:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22099298] [2022-03-20 17:37:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:37:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:37:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:37:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:37:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:37:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:37:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:37:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:37:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:37:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:37:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:37:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:37:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:37:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22099298] [2022-03-20 17:37:16,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22099298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:37:16,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:37:16,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:37:16,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:37:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063068051] [2022-03-20 17:37:16,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063068051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:37:16,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:37:16,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:37:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319622289] [2022-03-20 17:37:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:37:16,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:37:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:37:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:37:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:37:16,921 INFO L87 Difference]: Start difference. First operand 5565 states and 7877 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) [2022-03-20 17:37:27,202 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 [] [2022-03-20 17:37:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:37:33,912 INFO L93 Difference]: Finished difference Result 11610 states and 16812 transitions. [2022-03-20 17:37:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:37:33,912 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 [2022-03-20 17:37:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:37:33,925 INFO L225 Difference]: With dead ends: 11610 [2022-03-20 17:37:33,925 INFO L226 Difference]: Without dead ends: 6571 [2022-03-20 17:37:33,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:37:33,934 INFO L913 BasicCegarLoop]: 634 mSDtfsCounter, 1463 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 613 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:37:33,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1725 Invalid, 5864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 5250 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2022-03-20 17:37:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2022-03-20 17:37:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 5586. [2022-03-20 17:37:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5586 states, 4487 states have (on average 1.4098506797414754) internal successors, (6326), 4593 states have internal predecessors, (6326), 669 states have call successors, (669), 345 states have call predecessors, (669), 429 states have return successors, (903), 669 states have call predecessors, (903), 651 states have call successors, (903) [2022-03-20 17:37:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5586 states to 5586 states and 7898 transitions. [2022-03-20 17:37:36,330 INFO L78 Accepts]: Start accepts. Automaton has 5586 states and 7898 transitions. Word has length 86 [2022-03-20 17:37:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:37:36,330 INFO L478 AbstractCegarLoop]: Abstraction has 5586 states and 7898 transitions. [2022-03-20 17:37:36,330 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) [2022-03-20 17:37:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5586 states and 7898 transitions. [2022-03-20 17:37:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 17:37:36,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:37:36,331 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] [2022-03-20 17:37:36,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 17:37:36,331 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:37:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:37:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash -520968227, now seen corresponding path program 1 times [2022-03-20 17:37:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:37:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561460629] [2022-03-20 17:37:36,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:37:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash -520968227, now seen corresponding path program 2 times [2022-03-20 17:37:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:37:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58068513] [2022-03-20 17:37:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:37:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:37:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:37:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:37:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:37:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:37:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:37:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:37:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:37:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-20 17:37:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:37:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 17:37:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 17:37:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:37:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:37:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58068513] [2022-03-20 17:37:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58068513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:37:36,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:37:36,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:37:36,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:37:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561460629] [2022-03-20 17:37:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561460629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:37:36,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:37:36,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:37:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265407738] [2022-03-20 17:37:36,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:37:36,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:37:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:37:36,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:37:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:37:36,845 INFO L87 Difference]: Start difference. First operand 5586 states and 7898 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) [2022-03-20 17:37:42,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:37:44,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:37:50,513 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 [] [2022-03-20 17:37:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:37:57,134 INFO L93 Difference]: Finished difference Result 6534 states and 9475 transitions. [2022-03-20 17:37:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:37:57,135 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 [2022-03-20 17:37:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:37:57,145 INFO L225 Difference]: With dead ends: 6534 [2022-03-20 17:37:57,145 INFO L226 Difference]: Without dead ends: 6518 [2022-03-20 17:37:57,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:37:57,147 INFO L913 BasicCegarLoop]: 672 mSDtfsCounter, 2421 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 5980 mSolverCounterSat, 1051 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2460 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 7034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 5980 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:37:57,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2460 Valid, 2193 Invalid, 7034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 5980 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2022-03-20 17:37:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6518 states. [2022-03-20 17:37:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6518 to 5586. [2022-03-20 17:37:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5586 states, 4487 states have (on average 1.4098506797414754) internal successors, (6326), 4593 states have internal predecessors, (6326), 669 states have call successors, (669), 345 states have call predecessors, (669), 429 states have return successors, (903), 669 states have call predecessors, (903), 651 states have call successors, (903) [2022-03-20 17:37:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5586 states to 5586 states and 7898 transitions. [2022-03-20 17:37:59,545 INFO L78 Accepts]: Start accepts. Automaton has 5586 states and 7898 transitions. Word has length 88 [2022-03-20 17:37:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:37:59,545 INFO L478 AbstractCegarLoop]: Abstraction has 5586 states and 7898 transitions. [2022-03-20 17:37:59,545 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) [2022-03-20 17:37:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5586 states and 7898 transitions. [2022-03-20 17:37:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:37:59,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:37:59,547 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] [2022-03-20 17:37:59,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 17:37:59,547 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:37:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:37:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -243689622, now seen corresponding path program 1 times [2022-03-20 17:37:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:37:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912667174] [2022-03-20 17:37:59,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:37:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash -243689622, now seen corresponding path program 2 times [2022-03-20 17:37:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:37:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201473389] [2022-03-20 17:37:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:37:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:37:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:37:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:37:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:37:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:37:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:37:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:37:59,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:37:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:00,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:38:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:38:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:38:00,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:38:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201473389] [2022-03-20 17:38:00,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201473389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:38:00,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:38:00,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:38:00,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:38:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912667174] [2022-03-20 17:38:00,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912667174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:38:00,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:38:00,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:38:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804655366] [2022-03-20 17:38:00,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:38:00,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:38:00,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:38:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:38:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:38:00,179 INFO L87 Difference]: Start difference. First operand 5586 states and 7898 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) [2022-03-20 17:38:06,440 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 [] [2022-03-20 17:38:08,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:38:13,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 17:38:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:38:21,006 INFO L93 Difference]: Finished difference Result 6515 states and 9424 transitions. [2022-03-20 17:38:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:38:21,007 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 [2022-03-20 17:38:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:38:21,017 INFO L225 Difference]: With dead ends: 6515 [2022-03-20 17:38:21,018 INFO L226 Difference]: Without dead ends: 6492 [2022-03-20 17:38:21,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:38:21,019 INFO L913 BasicCegarLoop]: 665 mSDtfsCounter, 1994 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 6943 mSolverCounterSat, 906 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 2293 SdHoareTripleChecker+Invalid, 7852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 6943 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:38:21,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2033 Valid, 2293 Invalid, 7852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 6943 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2022-03-20 17:38:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2022-03-20 17:38:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 5582. [2022-03-20 17:38:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5582 states, 4484 states have (on average 1.4099018733273863) internal successors, (6322), 4590 states have internal predecessors, (6322), 668 states have call successors, (668), 345 states have call predecessors, (668), 429 states have return successors, (902), 668 states have call predecessors, (902), 650 states have call successors, (902) [2022-03-20 17:38:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5582 states to 5582 states and 7892 transitions. [2022-03-20 17:38:23,435 INFO L78 Accepts]: Start accepts. Automaton has 5582 states and 7892 transitions. Word has length 85 [2022-03-20 17:38:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:38:23,435 INFO L478 AbstractCegarLoop]: Abstraction has 5582 states and 7892 transitions. [2022-03-20 17:38:23,435 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) [2022-03-20 17:38:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5582 states and 7892 transitions. [2022-03-20 17:38:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:38:23,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:38:23,436 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] [2022-03-20 17:38:23,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 17:38:23,436 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:38:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:38:23,437 INFO L85 PathProgramCache]: Analyzing trace with hash -19498270, now seen corresponding path program 1 times [2022-03-20 17:38:23,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:38:23,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [514766026] [2022-03-20 17:38:23,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:38:23,437 INFO L85 PathProgramCache]: Analyzing trace with hash -19498270, now seen corresponding path program 2 times [2022-03-20 17:38:23,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:38:23,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959606134] [2022-03-20 17:38:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:38:23,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:38:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:38:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:38:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:38:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 17:38:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:38:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:38:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:38:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:23,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:38:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:38:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:38:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:38:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959606134] [2022-03-20 17:38:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959606134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:38:24,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:38:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:38:24,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:38:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [514766026] [2022-03-20 17:38:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [514766026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:38:24,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:38:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:38:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497183542] [2022-03-20 17:38:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:38:24,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:38:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:38:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:38:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:38:24,010 INFO L87 Difference]: Start difference. First operand 5582 states and 7892 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) [2022-03-20 17:38:35,296 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 [] [2022-03-20 17:38:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:38:43,243 INFO L93 Difference]: Finished difference Result 6511 states and 9418 transitions. [2022-03-20 17:38:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:38:43,244 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 [2022-03-20 17:38:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:38:43,255 INFO L225 Difference]: With dead ends: 6511 [2022-03-20 17:38:43,255 INFO L226 Difference]: Without dead ends: 6487 [2022-03-20 17:38:43,257 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 [2022-03-20 17:38:43,257 INFO L913 BasicCegarLoop]: 661 mSDtfsCounter, 1369 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 7606 mSolverCounterSat, 577 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 8184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 7606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:38:43,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 2404 Invalid, 8184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 7606 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2022-03-20 17:38:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states.