/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:52:03,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:52:03,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:52:03,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:52:03,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:52:03,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:52:03,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:52:03,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:52:03,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:52:03,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:52:03,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:52:03,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:52:03,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:52:03,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:52:03,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:52:03,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:52:03,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:52:03,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:52:03,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:52:03,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:52:03,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:52:03,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:52:03,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:52:03,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:52:03,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:52:03,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:52:03,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:52:03,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:52:03,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:52:03,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:52:03,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:52:03,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:52:03,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:52:03,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:52:03,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:52:03,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:52:03,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:52:03,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:52:03,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:52:03,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:52:03,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:52:03,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:52:03,714 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:52:03,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:52:03,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:52:03,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:52:03,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:52:03,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:52:03,715 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:52:03,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:52:03,715 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:52:03,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:52:03,716 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:52:03,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:52:03,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:52:03,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:52:03,716 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:52:03,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:52:03,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:52:03,717 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:52:03,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:52:03,717 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:52:03,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:52:03,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:52:03,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:52:03,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:52:03,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:52:03,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:52:03,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:52:03,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:52:03,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:52:03,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:52:03,922 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:52:03,923 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:52:03,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-04-02 15:52:04,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:52:05,372 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:52:05,373 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-04-02 15:52:05,412 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e4a1f35/5812fd60c8fc415fa1b0c264663d6ffb/FLAG530718dfa [2023-04-02 15:52:05,423 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e4a1f35/5812fd60c8fc415fa1b0c264663d6ffb [2023-04-02 15:52:05,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:52:05,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:52:05,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:52:05,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:52:05,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:52:05,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:52:05" (1/1) ... [2023-04-02 15:52:05,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2377a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:05, skipping insertion in model container [2023-04-02 15:52:05,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:52:05" (1/1) ... [2023-04-02 15:52:05,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:52:05,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:52:06,049 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-04-02 15:52:06,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:52:06,479 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:52:06,537 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-04-02 15:52:06,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:52:06,757 WARN L667 CHandler]: The function swprintf is called, but not defined or handled by StandardFunctionHandler. [2023-04-02 15:52:06,757 WARN L667 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-04-02 15:52:06,763 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:52:06,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06 WrapperNode [2023-04-02 15:52:06,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:52:06,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:52:06,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:52:06,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:52:06,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:06,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:06,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:06,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:06,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:07,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:07,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:07,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:07,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:52:07,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:52:07,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:52:07,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:52:07,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (1/1) ... [2023-04-02 15:52:07,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:52:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:52:07,099 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) [2023-04-02 15:52:07,130 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 [2023-04-02 15:52:07,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure DriverEntry [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyUnload [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyAddDevice [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConfigCallBack [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2023-04-02 15:52:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPower [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyReadWrite [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInterpretError [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFinishOperation [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlStartDrive [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDatarateSpecifyConfigure [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlRecalibrateDrive [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlDetermineMediaType [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAllocateIoBuffer [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFreeIoBuffer [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyThread [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlConsolidateMediaTypeWithBootSector [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckBootSector [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWriteTrack [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlReadWrite [2023-04-02 15:52:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFormat [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FlIssueCommand [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FlInitializeControllerHardware [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FlHdbit [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2023-04-02 15:52:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCancelQueuedRequest [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAcquireFastMutex [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExReleaseFastMutex [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExFreePool [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertHeadList [2023-04-02 15:52:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedRemoveHeadList [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAllocateMdl [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAttachDeviceToDeviceStack [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildAsynchronousFsdRequest [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateDevice [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoCreateSymbolicLink [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteDevice [2023-04-02 15:52:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDetachDevice [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeIrp [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoFreeMdl [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoReleaseCancelSpinLock [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetHardErrorOrVerifyDevice [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure KeAcquireSpinLockRaiseToDpc [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure KeDelayExecutionThread [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeEvent [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSemaphore [2023-04-02 15:52:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure KeInitializeSpinLock [2023-04-02 15:52:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure KeReleaseSemaphore [2023-04-02 15:52:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure KfReleaseSpinLock [2023-04-02 15:52:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2023-04-02 15:52:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmAllocateContiguousMemory [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmFreeContiguousMemory [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmMapLockedPagesSpecifyCache [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmPageEntireDriver [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmResetDriverPaging [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure MmUnlockPages [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ObfDereferenceObject [2023-04-02 15:52:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure PoStartNextPowerIrp [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure PsTerminateSystemThread [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlAnsiStringToUnicodeString [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCompareMemory [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCopyUnicodeString [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlDeleteRegistryValue [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlFreeUnicodeString [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitString [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlInitUnicodeString [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlQueryRegistryValues [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-04-02 15:52:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2023-04-02 15:52:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-04-02 15:52:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-04-02 15:52:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure swprintf [2023-04-02 15:52:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2023-04-02 15:52:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2023-04-02 15:52:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2023-04-02 15:52:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure RtlQueryRegistryValues [2023-04-02 15:52:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure RtlDeleteRegistryValue [2023-04-02 15:52:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitString [2023-04-02 15:52:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure RtlInitUnicodeString [2023-04-02 15:52:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure RtlAnsiStringToUnicodeString [2023-04-02 15:52:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCopyUnicodeString [2023-04-02 15:52:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure RtlFreeUnicodeString [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCompareMemory [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeEvent [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSemaphore [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeReleaseSemaphore [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeDelayExecutionThread [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KeInitializeSpinLock [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure KfReleaseSpinLock [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExFreePool [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExAcquireFastMutex [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExReleaseFastMutex [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertHeadList [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedRemoveHeadList [2023-04-02 15:52:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure MmUnlockPages [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure MmMapLockedPagesSpecifyCache [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure MmAllocateContiguousMemory [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure MmFreeContiguousMemory [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure MmResetDriverPaging [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure MmPageEntireDriver [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure PsTerminateSystemThread [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoAllocateMdl [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoAttachDeviceToDeviceStack [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildAsynchronousFsdRequest [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateDevice [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoCreateSymbolicLink [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteDevice [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoDetachDevice [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeIrp [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoFreeMdl [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2023-04-02 15:52:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure IoReleaseCancelSpinLock [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetHardErrorOrVerifyDevice [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure PoStartNextPowerIrp [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure ObfDereferenceObject [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure DriverEntry [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyUnload [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FlConfigCallBack [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FlInitializeControllerHardware [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyReadWrite [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FlRecalibrateDrive [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FlDatarateSpecifyConfigure [2023-04-02 15:52:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure FlStartDrive [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlFinishOperation [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlDetermineMediaType [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyThread [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWrite [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlFormat [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlIssueCommand [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlInterpretError [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlAllocateIoBuffer [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlFreeIoBuffer [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlConsolidateMediaTypeWithBootSector [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckBootSector [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlReadWriteTrack [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyAddDevice [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPower [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2023-04-02 15:52:07,161 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCancelQueuedRequest [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure FlHdbit [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure KeAcquireSpinLockRaiseToDpc [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-04-02 15:52:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-04-02 15:52:07,717 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:52:07,720 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:52:07,747 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:07,765 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:07,766 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:07,766 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:07,771 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:07,771 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,370 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,375 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,375 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,375 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,382 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,382 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,385 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,391 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,391 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,424 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,429 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,429 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,431 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,446 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,446 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,447 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,457 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,457 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,492 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,555 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2023-04-02 15:52:10,555 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2023-04-02 15:52:10,618 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,622 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,622 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,622 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,625 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,626 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,626 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,631 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,632 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,640 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,644 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,644 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:10,645 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:10,648 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:10,648 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:18,123 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:18,137 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-04-02 15:52:18,137 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-04-02 15:52:18,179 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:18,414 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2023-04-02 15:52:18,414 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2023-04-02 15:52:18,740 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:18,744 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:18,744 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:18,855 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:18,884 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-04-02 15:52:18,884 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-04-02 15:52:18,886 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:19,012 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2023-04-02 15:52:19,013 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2023-04-02 15:52:19,013 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:19,069 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2023-04-02 15:52:19,069 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2023-04-02 15:52:29,538 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:29,542 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:29,542 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:29,667 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:29,671 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:29,671 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:29,686 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,123 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2023-04-02 15:52:32,123 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2023-04-02 15:52:32,175 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,462 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2023-04-02 15:52:32,462 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2023-04-02 15:52:32,463 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,475 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-04-02 15:52:32,475 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-04-02 15:52:32,476 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,511 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2023-04-02 15:52:32,511 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2023-04-02 15:52:32,513 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,521 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-04-02 15:52:32,521 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-04-02 15:52:32,562 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,566 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:32,566 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:32,583 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,587 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-04-02 15:52:32,588 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-04-02 15:52:32,588 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:32,659 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume !false; [2023-04-02 15:52:32,659 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##45: assume false; [2023-04-02 15:52:32,725 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-04-02 15:52:35,098 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume !false; [2023-04-02 15:52:35,098 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##13: assume false; [2023-04-02 15:52:35,133 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:52:36,789 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:52:36,789 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-04-02 15:52:36,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:52:36 BoogieIcfgContainer [2023-04-02 15:52:36,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:52:36,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:52:36,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:52:36,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:52:36,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:52:05" (1/3) ... [2023-04-02 15:52:36,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccd5125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:52:36, skipping insertion in model container [2023-04-02 15:52:36,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:52:06" (2/3) ... [2023-04-02 15:52:36,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccd5125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:52:36, skipping insertion in model container [2023-04-02 15:52:36,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:52:36" (3/3) ... [2023-04-02 15:52:36,801 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2023-04-02 15:52:36,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:52:36,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:52:36,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:52:36,882 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1709140e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:52:36,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:52:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 1117 states, 812 states have (on average 1.5135467980295567) internal successors, (1229), 853 states have internal predecessors, (1229), 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) [2023-04-02 15:52:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 15:52:36,898 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:52:36,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:52:36,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:52:36,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:52:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash 821941984, now seen corresponding path program 1 times [2023-04-02 15:52:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:52:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374715198] [2023-04-02 15:52:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:52:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:52:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:52:37,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:52:37,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374715198] [2023-04-02 15:52:37,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374715198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:52:37,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:52:37,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:52:37,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610604490] [2023-04-02 15:52:37,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:52:37,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:52:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:52:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:52:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:37,530 INFO L87 Difference]: Start difference. First operand has 1117 states, 812 states have (on average 1.5135467980295567) internal successors, (1229), 853 states have internal predecessors, (1229), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:52:40,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:42,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:52:43,019 INFO L93 Difference]: Finished difference Result 971 states and 1456 transitions. [2023-04-02 15:52:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:52:43,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 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 31 [2023-04-02 15:52:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:52:43,035 INFO L225 Difference]: With dead ends: 971 [2023-04-02 15:52:43,035 INFO L226 Difference]: Without dead ends: 520 [2023-04-02 15:52:43,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:43,043 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 25 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:52:43,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1248 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 205 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-04-02 15:52:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-04-02 15:52:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2023-04-02 15:52:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 352 states have (on average 1.4460227272727273) internal successors, (509), 384 states have internal predecessors, (509), 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) [2023-04-02 15:52:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 727 transitions. [2023-04-02 15:52:43,141 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 727 transitions. Word has length 31 [2023-04-02 15:52:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:52:43,142 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 727 transitions. [2023-04-02 15:52:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:52:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 727 transitions. [2023-04-02 15:52:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 15:52:43,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:52:43,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:52:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:52:43,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:52:43,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:52:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1380777218, now seen corresponding path program 1 times [2023-04-02 15:52:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:52:43,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076653709] [2023-04-02 15:52:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:52:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:52:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:52:43,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:52:43,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076653709] [2023-04-02 15:52:43,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076653709] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:52:43,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:52:43,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:52:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489073981] [2023-04-02 15:52:43,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:52:43,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:52:43,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:52:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:52:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:43,620 INFO L87 Difference]: Start difference. First operand 520 states and 727 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:52:46,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:48,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:50,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:52:51,029 INFO L93 Difference]: Finished difference Result 1196 states and 1694 transitions. [2023-04-02 15:52:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:52:51,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (10), 3 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 34 [2023-04-02 15:52:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:52:51,035 INFO L225 Difference]: With dead ends: 1196 [2023-04-02 15:52:51,035 INFO L226 Difference]: Without dead ends: 830 [2023-04-02 15:52:51,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:51,037 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 532 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:52:51,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1182 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 250 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 15:52:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-04-02 15:52:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 811. [2023-04-02 15:52:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 567 states have (on average 1.437389770723104) internal successors, (815), 597 states have internal predecessors, (815), 167 states have call successors, (167), 81 states have call predecessors, (167), 76 states have return successors, (164), 142 states have call predecessors, (164), 151 states have call successors, (164) [2023-04-02 15:52:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1146 transitions. [2023-04-02 15:52:51,131 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1146 transitions. Word has length 34 [2023-04-02 15:52:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:52:51,132 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1146 transitions. [2023-04-02 15:52:51,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:52:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1146 transitions. [2023-04-02 15:52:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 15:52:51,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:52:51,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:52:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 15:52:51,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:52:51,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:52:51,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1153845192, now seen corresponding path program 1 times [2023-04-02 15:52:51,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:52:51,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644392046] [2023-04-02 15:52:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:52:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:52:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:52:51,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:52:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644392046] [2023-04-02 15:52:51,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644392046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:52:51,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:52:51,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:52:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828149503] [2023-04-02 15:52:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:52:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:52:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:52:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:52:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:51,615 INFO L87 Difference]: Start difference. First operand 811 states and 1146 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 15:52:54,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:52:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:52:55,092 INFO L93 Difference]: Finished difference Result 1364 states and 1968 transitions. [2023-04-02 15:52:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:52:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (11), 3 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 44 [2023-04-02 15:52:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:52:55,099 INFO L225 Difference]: With dead ends: 1364 [2023-04-02 15:52:55,099 INFO L226 Difference]: Without dead ends: 1345 [2023-04-02 15:52:55,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:55,100 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 666 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:52:55,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 1062 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-04-02 15:52:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2023-04-02 15:52:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1318. [2023-04-02 15:52:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 938 states have (on average 1.4584221748400852) internal successors, (1368), 980 states have internal predecessors, (1368), 256 states have call successors, (256), 126 states have call predecessors, (256), 123 states have return successors, (284), 227 states have call predecessors, (284), 240 states have call successors, (284) [2023-04-02 15:52:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1908 transitions. [2023-04-02 15:52:55,139 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1908 transitions. Word has length 44 [2023-04-02 15:52:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:52:55,139 INFO L495 AbstractCegarLoop]: Abstraction has 1318 states and 1908 transitions. [2023-04-02 15:52:55,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 15:52:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1908 transitions. [2023-04-02 15:52:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 15:52:55,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:52:55,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:52:55,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 15:52:55,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:52:55,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:52:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash -703661178, now seen corresponding path program 1 times [2023-04-02 15:52:55,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:52:55,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105220584] [2023-04-02 15:52:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:52:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:52:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:52:55,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:52:55,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105220584] [2023-04-02 15:52:55,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105220584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:52:55,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:52:55,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:52:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003230833] [2023-04-02 15:52:55,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:52:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:52:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:52:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:52:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:52:55,311 INFO L87 Difference]: Start difference. First operand 1318 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:52:58,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:00,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:02,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:02,729 INFO L93 Difference]: Finished difference Result 1853 states and 2709 transitions. [2023-04-02 15:53:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:53:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 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 45 [2023-04-02 15:53:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:02,737 INFO L225 Difference]: With dead ends: 1853 [2023-04-02 15:53:02,737 INFO L226 Difference]: Without dead ends: 1850 [2023-04-02 15:53:02,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:02,739 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 437 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:02,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1580 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 15:53:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2023-04-02 15:53:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1778. [2023-04-02 15:53:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1282 states have (on average 1.4742589703588143) internal successors, (1890), 1330 states have internal predecessors, (1890), 326 states have call successors, (326), 172 states have call predecessors, (326), 169 states have return successors, (381), 291 states have call predecessors, (381), 310 states have call successors, (381) [2023-04-02 15:53:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2597 transitions. [2023-04-02 15:53:02,804 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2597 transitions. Word has length 45 [2023-04-02 15:53:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:02,806 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2597 transitions. [2023-04-02 15:53:02,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:53:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2597 transitions. [2023-04-02 15:53:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 15:53:02,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:02,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:02,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 15:53:02,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:02,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1507130984, now seen corresponding path program 1 times [2023-04-02 15:53:02,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:02,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678342990] [2023-04-02 15:53:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:03,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678342990] [2023-04-02 15:53:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678342990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:03,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:53:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483406632] [2023-04-02 15:53:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:03,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:53:03,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:53:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:03,165 INFO L87 Difference]: Start difference. First operand 1778 states and 2597 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:53:05,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:07,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:08,120 INFO L93 Difference]: Finished difference Result 1810 states and 2640 transitions. [2023-04-02 15:53:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:53:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (10), 3 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 46 [2023-04-02 15:53:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:08,128 INFO L225 Difference]: With dead ends: 1810 [2023-04-02 15:53:08,128 INFO L226 Difference]: Without dead ends: 1806 [2023-04-02 15:53:08,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:08,129 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 53 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:08,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1169 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2023-04-02 15:53:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-04-02 15:53:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1791. [2023-04-02 15:53:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1296 states have (on average 1.474537037037037) internal successors, (1911), 1340 states have internal predecessors, (1911), 325 states have call successors, (325), 172 states have call predecessors, (325), 169 states have return successors, (380), 292 states have call predecessors, (380), 309 states have call successors, (380) [2023-04-02 15:53:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2616 transitions. [2023-04-02 15:53:08,185 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2616 transitions. Word has length 46 [2023-04-02 15:53:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:08,185 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2616 transitions. [2023-04-02 15:53:08,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-02 15:53:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2616 transitions. [2023-04-02 15:53:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 15:53:08,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:08,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 15:53:08,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:08,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash -576879139, now seen corresponding path program 1 times [2023-04-02 15:53:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:08,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010918803] [2023-04-02 15:53:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:08,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010918803] [2023-04-02 15:53:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010918803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:08,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:08,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:53:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906938288] [2023-04-02 15:53:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:08,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:53:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:53:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:53:08,634 INFO L87 Difference]: Start difference. First operand 1791 states and 2616 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:53:11,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:13,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:15,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:17,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:19,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:23,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:23,497 INFO L93 Difference]: Finished difference Result 2020 states and 2921 transitions. [2023-04-02 15:53:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:53:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 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 46 [2023-04-02 15:53:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:23,505 INFO L225 Difference]: With dead ends: 2020 [2023-04-02 15:53:23,505 INFO L226 Difference]: Without dead ends: 1883 [2023-04-02 15:53:23,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:53:23,506 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 1971 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 483 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:23,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1976 Valid, 1624 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 929 Invalid, 6 Unknown, 0 Unchecked, 14.7s Time] [2023-04-02 15:53:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-02 15:53:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1785. [2023-04-02 15:53:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1290 states have (on average 1.4705426356589146) internal successors, (1897), 1334 states have internal predecessors, (1897), 325 states have call successors, (325), 172 states have call predecessors, (325), 169 states have return successors, (380), 292 states have call predecessors, (380), 309 states have call successors, (380) [2023-04-02 15:53:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2602 transitions. [2023-04-02 15:53:23,565 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2602 transitions. Word has length 46 [2023-04-02 15:53:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:23,565 INFO L495 AbstractCegarLoop]: Abstraction has 1785 states and 2602 transitions. [2023-04-02 15:53:23,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:53:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2602 transitions. [2023-04-02 15:53:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 15:53:23,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:23,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:23,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 15:53:23,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:23,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1946441566, now seen corresponding path program 1 times [2023-04-02 15:53:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246533946] [2023-04-02 15:53:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:23,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246533946] [2023-04-02 15:53:23,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246533946] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:23,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:53:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173454104] [2023-04-02 15:53:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:53:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:53:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:23,736 INFO L87 Difference]: Start difference. First operand 1785 states and 2602 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:53:26,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:28,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:29,368 INFO L93 Difference]: Finished difference Result 2267 states and 3342 transitions. [2023-04-02 15:53:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:53:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 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 47 [2023-04-02 15:53:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:29,378 INFO L225 Difference]: With dead ends: 2267 [2023-04-02 15:53:29,378 INFO L226 Difference]: Without dead ends: 2262 [2023-04-02 15:53:29,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:29,380 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 387 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:29,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1485 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-04-02 15:53:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2023-04-02 15:53:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2214. [2023-04-02 15:53:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 1618 states have (on average 1.4814585908529048) internal successors, (2397), 1664 states have internal predecessors, (2397), 386 states have call successors, (386), 210 states have call predecessors, (386), 209 states have return successors, (466), 355 states have call predecessors, (466), 370 states have call successors, (466) [2023-04-02 15:53:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 3249 transitions. [2023-04-02 15:53:29,462 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 3249 transitions. Word has length 47 [2023-04-02 15:53:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:29,463 INFO L495 AbstractCegarLoop]: Abstraction has 2214 states and 3249 transitions. [2023-04-02 15:53:29,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:53:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 3249 transitions. [2023-04-02 15:53:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 15:53:29,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:29,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:29,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 15:53:29,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:29,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1962311150, now seen corresponding path program 1 times [2023-04-02 15:53:29,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:29,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999433646] [2023-04-02 15:53:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:29,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:29,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999433646] [2023-04-02 15:53:29,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999433646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:29,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:29,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:53:29,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19750426] [2023-04-02 15:53:29,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:29,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:53:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:53:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:29,802 INFO L87 Difference]: Start difference. First operand 2214 states and 3249 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:32,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:34,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:37,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:37,214 INFO L93 Difference]: Finished difference Result 6137 states and 9136 transitions. [2023-04-02 15:53:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:53:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2023-04-02 15:53:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:37,231 INFO L225 Difference]: With dead ends: 6137 [2023-04-02 15:53:37,231 INFO L226 Difference]: Without dead ends: 4121 [2023-04-02 15:53:37,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:53:37,239 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 651 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:37,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1191 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 15:53:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2023-04-02 15:53:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 4075. [2023-04-02 15:53:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3004 states have (on average 1.4930093209054593) internal successors, (4485), 3078 states have internal predecessors, (4485), 690 states have call successors, (690), 384 states have call predecessors, (690), 380 states have return successors, (891), 636 states have call predecessors, (891), 677 states have call successors, (891) [2023-04-02 15:53:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6066 transitions. [2023-04-02 15:53:37,410 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6066 transitions. Word has length 49 [2023-04-02 15:53:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:37,410 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 6066 transitions. [2023-04-02 15:53:37,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6066 transitions. [2023-04-02 15:53:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 15:53:37,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:37,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:37,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 15:53:37,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:37,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash 299861457, now seen corresponding path program 1 times [2023-04-02 15:53:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898312428] [2023-04-02 15:53:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:37,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898312428] [2023-04-02 15:53:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898312428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:53:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991076481] [2023-04-02 15:53:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:53:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:53:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:53:37,701 INFO L87 Difference]: Start difference. First operand 4075 states and 6066 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:41,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:43,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:45,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:46,484 INFO L93 Difference]: Finished difference Result 4173 states and 6250 transitions. [2023-04-02 15:53:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:53:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (10), 2 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 49 [2023-04-02 15:53:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:46,498 INFO L225 Difference]: With dead ends: 4173 [2023-04-02 15:53:46,499 INFO L226 Difference]: Without dead ends: 4167 [2023-04-02 15:53:46,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:53:46,500 INFO L413 NwaCegarLoop]: 917 mSDtfsCounter, 1255 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 234 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:46,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 1650 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 718 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2023-04-02 15:53:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2023-04-02 15:53:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4075. [2023-04-02 15:53:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3004 states have (on average 1.492676431424767) internal successors, (4484), 3078 states have internal predecessors, (4484), 690 states have call successors, (690), 384 states have call predecessors, (690), 380 states have return successors, (891), 636 states have call predecessors, (891), 677 states have call successors, (891) [2023-04-02 15:53:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6065 transitions. [2023-04-02 15:53:46,642 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6065 transitions. Word has length 49 [2023-04-02 15:53:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:46,643 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 6065 transitions. [2023-04-02 15:53:46,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6065 transitions. [2023-04-02 15:53:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 15:53:46,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:46,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:46,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 15:53:46,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:46,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:46,645 INFO L85 PathProgramCache]: Analyzing trace with hash -156157633, now seen corresponding path program 1 times [2023-04-02 15:53:46,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:46,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691577234] [2023-04-02 15:53:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:46,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:46,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691577234] [2023-04-02 15:53:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691577234] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:46,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:53:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043949234] [2023-04-02 15:53:46,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:53:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:53:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:53:46,924 INFO L87 Difference]: Start difference. First operand 4075 states and 6065 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:50,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:52,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:54,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:53:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:53:55,208 INFO L93 Difference]: Finished difference Result 4169 states and 6244 transitions. [2023-04-02 15:53:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:53:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (10), 2 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 50 [2023-04-02 15:53:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:53:55,222 INFO L225 Difference]: With dead ends: 4169 [2023-04-02 15:53:55,222 INFO L226 Difference]: Without dead ends: 4163 [2023-04-02 15:53:55,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:53:55,224 INFO L413 NwaCegarLoop]: 916 mSDtfsCounter, 1246 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 233 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:53:55,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 1647 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 716 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2023-04-02 15:53:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2023-04-02 15:53:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4075. [2023-04-02 15:53:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3004 states have (on average 1.4923435419440745) internal successors, (4483), 3078 states have internal predecessors, (4483), 690 states have call successors, (690), 384 states have call predecessors, (690), 380 states have return successors, (891), 636 states have call predecessors, (891), 677 states have call successors, (891) [2023-04-02 15:53:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6064 transitions. [2023-04-02 15:53:55,442 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6064 transitions. Word has length 50 [2023-04-02 15:53:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:53:55,442 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 6064 transitions. [2023-04-02 15:53:55,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:53:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6064 transitions. [2023-04-02 15:53:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 15:53:55,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:53:55,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:53:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 15:53:55,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:53:55,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:53:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1794502834, now seen corresponding path program 1 times [2023-04-02 15:53:55,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:53:55,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377589695] [2023-04-02 15:53:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:53:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:53:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:53:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:53:55,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:53:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377589695] [2023-04-02 15:53:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377589695] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:53:55,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:53:55,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:53:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2593688] [2023-04-02 15:53:55,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:53:55,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:53:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:53:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:53:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:53:55,693 INFO L87 Difference]: Start difference. First operand 4075 states and 6064 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:53:58,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:00,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:02,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:04,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:05,222 INFO L93 Difference]: Finished difference Result 4090 states and 6080 transitions. [2023-04-02 15:54:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:54:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 2 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 50 [2023-04-02 15:54:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:05,240 INFO L225 Difference]: With dead ends: 4090 [2023-04-02 15:54:05,240 INFO L226 Difference]: Without dead ends: 4073 [2023-04-02 15:54:05,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:05,243 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 1 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2457 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 305 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2023-04-02 15:54:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4073 states. [2023-04-02 15:54:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4073 to 4073. [2023-04-02 15:54:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 3003 states have (on average 1.4921744921744922) internal successors, (4481), 3077 states have internal predecessors, (4481), 689 states have call successors, (689), 384 states have call predecessors, (689), 380 states have return successors, (890), 635 states have call predecessors, (890), 676 states have call successors, (890) [2023-04-02 15:54:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 6060 transitions. [2023-04-02 15:54:05,379 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 6060 transitions. Word has length 50 [2023-04-02 15:54:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:05,380 INFO L495 AbstractCegarLoop]: Abstraction has 4073 states and 6060 transitions. [2023-04-02 15:54:05,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 6060 transitions. [2023-04-02 15:54:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 15:54:05,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:05,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 15:54:05,381 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:05,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -463680198, now seen corresponding path program 1 times [2023-04-02 15:54:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636709450] [2023-04-02 15:54:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:05,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:05,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636709450] [2023-04-02 15:54:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636709450] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:54:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017289869] [2023-04-02 15:54:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:54:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:54:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:05,659 INFO L87 Difference]: Start difference. First operand 4073 states and 6060 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:09,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:11,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:13,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:15,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:15,622 INFO L93 Difference]: Finished difference Result 4088 states and 6076 transitions. [2023-04-02 15:54:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:54:15,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 2 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 51 [2023-04-02 15:54:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:15,633 INFO L225 Difference]: With dead ends: 4088 [2023-04-02 15:54:15,633 INFO L226 Difference]: Without dead ends: 4067 [2023-04-02 15:54:15,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:15,636 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 1 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:15,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2443 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2023-04-02 15:54:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2023-04-02 15:54:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 4067. [2023-04-02 15:54:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 3000 states have (on average 1.4923333333333333) internal successors, (4477), 3074 states have internal predecessors, (4477), 687 states have call successors, (687), 383 states have call predecessors, (687), 379 states have return successors, (888), 633 states have call predecessors, (888), 674 states have call successors, (888) [2023-04-02 15:54:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 6052 transitions. [2023-04-02 15:54:15,819 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 6052 transitions. Word has length 51 [2023-04-02 15:54:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:15,819 INFO L495 AbstractCegarLoop]: Abstraction has 4067 states and 6052 transitions. [2023-04-02 15:54:15,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 6052 transitions. [2023-04-02 15:54:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 15:54:15,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:15,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:15,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 15:54:15,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:15,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1420493303, now seen corresponding path program 1 times [2023-04-02 15:54:15,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:15,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913763400] [2023-04-02 15:54:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:15,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:15,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:15,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913763400] [2023-04-02 15:54:15,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913763400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:15,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:15,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:54:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008794022] [2023-04-02 15:54:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:54:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:54:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:54:15,989 INFO L87 Difference]: Start difference. First operand 4067 states and 6052 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 15:54:18,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:20,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:20,822 INFO L93 Difference]: Finished difference Result 7673 states and 11533 transitions. [2023-04-02 15:54:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:54:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (9), 2 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 52 [2023-04-02 15:54:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:20,834 INFO L225 Difference]: With dead ends: 7673 [2023-04-02 15:54:20,834 INFO L226 Difference]: Without dead ends: 4103 [2023-04-02 15:54:20,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:54:20,844 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 3 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:20,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1190 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 162 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-04-02 15:54:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2023-04-02 15:54:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4085. [2023-04-02 15:54:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3012 states have (on average 1.4903718459495352) internal successors, (4489), 3090 states have internal predecessors, (4489), 691 states have call successors, (691), 383 states have call predecessors, (691), 381 states have return successors, (900), 635 states have call predecessors, (900), 678 states have call successors, (900) [2023-04-02 15:54:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6080 transitions. [2023-04-02 15:54:21,044 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6080 transitions. Word has length 52 [2023-04-02 15:54:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:21,044 INFO L495 AbstractCegarLoop]: Abstraction has 4085 states and 6080 transitions. [2023-04-02 15:54:21,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 15:54:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6080 transitions. [2023-04-02 15:54:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 15:54:21,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:21,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:21,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 15:54:21,046 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:21,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1820788170, now seen corresponding path program 1 times [2023-04-02 15:54:21,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457920685] [2023-04-02 15:54:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:21,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457920685] [2023-04-02 15:54:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457920685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:21,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:21,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:54:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180882703] [2023-04-02 15:54:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:54:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:54:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:21,312 INFO L87 Difference]: Start difference. First operand 4085 states and 6080 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:24,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:26,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:28,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:30,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:31,148 INFO L93 Difference]: Finished difference Result 4103 states and 6099 transitions. [2023-04-02 15:54:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:54:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 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 55 [2023-04-02 15:54:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:31,166 INFO L225 Difference]: With dead ends: 4103 [2023-04-02 15:54:31,166 INFO L226 Difference]: Without dead ends: 4083 [2023-04-02 15:54:31,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:31,168 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 1 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:31,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2454 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2023-04-02 15:54:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2023-04-02 15:54:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4083. [2023-04-02 15:54:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 3011 states have (on average 1.4902025905014946) internal successors, (4487), 3089 states have internal predecessors, (4487), 690 states have call successors, (690), 383 states have call predecessors, (690), 381 states have return successors, (899), 634 states have call predecessors, (899), 677 states have call successors, (899) [2023-04-02 15:54:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 6076 transitions. [2023-04-02 15:54:31,317 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 6076 transitions. Word has length 55 [2023-04-02 15:54:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:31,317 INFO L495 AbstractCegarLoop]: Abstraction has 4083 states and 6076 transitions. [2023-04-02 15:54:31,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 6076 transitions. [2023-04-02 15:54:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 15:54:31,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:31,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:31,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 15:54:31,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:31,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -68162978, now seen corresponding path program 1 times [2023-04-02 15:54:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:31,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978211480] [2023-04-02 15:54:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:31,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:31,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978211480] [2023-04-02 15:54:31,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978211480] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:31,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:31,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:54:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173229237] [2023-04-02 15:54:31,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:31,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:54:31,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:54:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:31,586 INFO L87 Difference]: Start difference. First operand 4083 states and 6076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:35,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:37,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:39,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:41,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:41,374 INFO L93 Difference]: Finished difference Result 4107 states and 6114 transitions. [2023-04-02 15:54:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:54:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 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 [2023-04-02 15:54:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:41,388 INFO L225 Difference]: With dead ends: 4107 [2023-04-02 15:54:41,388 INFO L226 Difference]: Without dead ends: 4091 [2023-04-02 15:54:41,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:54:41,392 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 1 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:41,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2401 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2023-04-02 15:54:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2023-04-02 15:54:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4085. [2023-04-02 15:54:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3012 states have (on average 1.4900398406374502) internal successors, (4488), 3091 states have internal predecessors, (4488), 690 states have call successors, (690), 383 states have call predecessors, (690), 382 states have return successors, (903), 634 states have call predecessors, (903), 677 states have call successors, (903) [2023-04-02 15:54:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6081 transitions. [2023-04-02 15:54:41,542 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6081 transitions. Word has length 56 [2023-04-02 15:54:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:41,542 INFO L495 AbstractCegarLoop]: Abstraction has 4085 states and 6081 transitions. [2023-04-02 15:54:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:54:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6081 transitions. [2023-04-02 15:54:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 15:54:41,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:41,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 15:54:41,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:41,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1668304734, now seen corresponding path program 1 times [2023-04-02 15:54:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704033618] [2023-04-02 15:54:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:41,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:41,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704033618] [2023-04-02 15:54:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704033618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:41,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 15:54:41,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821858784] [2023-04-02 15:54:41,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:41,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 15:54:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 15:54:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:54:41,881 INFO L87 Difference]: Start difference. First operand 4085 states and 6081 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 15:54:46,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:48,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:50,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:52,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:54:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:54:53,591 INFO L93 Difference]: Finished difference Result 6226 states and 9330 transitions. [2023-04-02 15:54:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:54:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (10), 3 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 58 [2023-04-02 15:54:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:54:53,603 INFO L225 Difference]: With dead ends: 6226 [2023-04-02 15:54:53,603 INFO L226 Difference]: Without dead ends: 4300 [2023-04-02 15:54:53,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-02 15:54:53,610 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1089 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 469 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:54:53,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1546 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1555 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2023-04-02 15:54:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2023-04-02 15:54:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4243. [2023-04-02 15:54:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4243 states, 3121 states have (on average 1.4793335469400832) internal successors, (4617), 3215 states have internal predecessors, (4617), 708 states have call successors, (708), 383 states have call predecessors, (708), 413 states have return successors, (1002), 659 states have call predecessors, (1002), 694 states have call successors, (1002) [2023-04-02 15:54:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6327 transitions. [2023-04-02 15:54:53,777 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6327 transitions. Word has length 58 [2023-04-02 15:54:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:54:53,777 INFO L495 AbstractCegarLoop]: Abstraction has 4243 states and 6327 transitions. [2023-04-02 15:54:53,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 15:54:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6327 transitions. [2023-04-02 15:54:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 15:54:53,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:54:53,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:54:53,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 15:54:53,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:54:53,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:54:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1369976279, now seen corresponding path program 1 times [2023-04-02 15:54:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:54:53,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930212215] [2023-04-02 15:54:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:54:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:54:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:54:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:54:54,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:54:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930212215] [2023-04-02 15:54:54,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930212215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:54:54,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:54:54,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 15:54:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689451452] [2023-04-02 15:54:54,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:54:54,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 15:54:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:54:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 15:54:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:54:54,086 INFO L87 Difference]: Start difference. First operand 4243 states and 6327 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 15:54:58,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:00,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:02,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:04,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:05,814 INFO L93 Difference]: Finished difference Result 6247 states and 9346 transitions. [2023-04-02 15:55:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:55:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (10), 3 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 59 [2023-04-02 15:55:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:05,825 INFO L225 Difference]: With dead ends: 6247 [2023-04-02 15:55:05,825 INFO L226 Difference]: Without dead ends: 4296 [2023-04-02 15:55:05,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-02 15:55:05,832 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 987 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 316 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:05,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 1526 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1473 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2023-04-02 15:55:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2023-04-02 15:55:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4247. [2023-04-02 15:55:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 3123 states have (on average 1.4774255523535063) internal successors, (4614), 3219 states have internal predecessors, (4614), 708 states have call successors, (708), 383 states have call predecessors, (708), 415 states have return successors, (1005), 659 states have call predecessors, (1005), 694 states have call successors, (1005) [2023-04-02 15:55:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 6327 transitions. [2023-04-02 15:55:06,031 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 6327 transitions. Word has length 59 [2023-04-02 15:55:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 4247 states and 6327 transitions. [2023-04-02 15:55:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 15:55:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 6327 transitions. [2023-04-02 15:55:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 15:55:06,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:06,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:06,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 15:55:06,033 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:06,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:06,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1276504416, now seen corresponding path program 1 times [2023-04-02 15:55:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483286527] [2023-04-02 15:55:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:06,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483286527] [2023-04-02 15:55:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483286527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:06,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:55:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23461440] [2023-04-02 15:55:06,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:06,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:55:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:06,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:55:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:55:06,300 INFO L87 Difference]: Start difference. First operand 4247 states and 6327 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:10,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:12,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:14,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:16,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:16,405 INFO L93 Difference]: Finished difference Result 4262 states and 6343 transitions. [2023-04-02 15:55:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:55:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 2 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 [2023-04-02 15:55:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:16,416 INFO L225 Difference]: With dead ends: 4262 [2023-04-02 15:55:16,416 INFO L226 Difference]: Without dead ends: 4242 [2023-04-02 15:55:16,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:55:16,417 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 1 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:16,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2445 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 299 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2023-04-02 15:55:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2023-04-02 15:55:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 4242. [2023-04-02 15:55:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4242 states, 3120 states have (on average 1.4775641025641026) internal successors, (4610), 3216 states have internal predecessors, (4610), 707 states have call successors, (707), 383 states have call predecessors, (707), 414 states have return successors, (1003), 657 states have call predecessors, (1003), 693 states have call successors, (1003) [2023-04-02 15:55:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 6320 transitions. [2023-04-02 15:55:16,607 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 6320 transitions. Word has length 59 [2023-04-02 15:55:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:16,607 INFO L495 AbstractCegarLoop]: Abstraction has 4242 states and 6320 transitions. [2023-04-02 15:55:16,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 6320 transitions. [2023-04-02 15:55:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 15:55:16,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:16,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 15:55:16,609 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:16,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1183585851, now seen corresponding path program 1 times [2023-04-02 15:55:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599053225] [2023-04-02 15:55:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:16,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:16,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599053225] [2023-04-02 15:55:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599053225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:16,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:55:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958915474] [2023-04-02 15:55:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:55:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:55:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:55:16,784 INFO L87 Difference]: Start difference. First operand 4242 states and 6320 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 15:55:19,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:21,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:22,213 INFO L93 Difference]: Finished difference Result 6186 states and 9260 transitions. [2023-04-02 15:55:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:55:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (12), 2 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 62 [2023-04-02 15:55:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:22,244 INFO L225 Difference]: With dead ends: 6186 [2023-04-02 15:55:22,244 INFO L226 Difference]: Without dead ends: 4224 [2023-04-02 15:55:22,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:55:22,251 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 438 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:22,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1547 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2023-04-02 15:55:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2023-04-02 15:55:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 4178. [2023-04-02 15:55:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 3068 states have (on average 1.4765319426336376) internal successors, (4530), 3167 states have internal predecessors, (4530), 700 states have call successors, (700), 381 states have call predecessors, (700), 409 states have return successors, (968), 641 states have call predecessors, (968), 682 states have call successors, (968) [2023-04-02 15:55:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 6198 transitions. [2023-04-02 15:55:22,500 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 6198 transitions. Word has length 62 [2023-04-02 15:55:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:22,500 INFO L495 AbstractCegarLoop]: Abstraction has 4178 states and 6198 transitions. [2023-04-02 15:55:22,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 15:55:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 6198 transitions. [2023-04-02 15:55:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:55:22,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:22,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:22,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 15:55:22,502 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:22,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1885262873, now seen corresponding path program 1 times [2023-04-02 15:55:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:22,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317537326] [2023-04-02 15:55:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:22,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:22,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317537326] [2023-04-02 15:55:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317537326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:22,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:22,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 15:55:22,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129200585] [2023-04-02 15:55:22,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:22,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 15:55:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 15:55:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:55:22,903 INFO L87 Difference]: Start difference. First operand 4178 states and 6198 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:55:26,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:28,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:30,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:32,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:34,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:34,931 INFO L93 Difference]: Finished difference Result 4208 states and 6250 transitions. [2023-04-02 15:55:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:55:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (10), 2 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 60 [2023-04-02 15:55:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:34,940 INFO L225 Difference]: With dead ends: 4208 [2023-04-02 15:55:34,941 INFO L226 Difference]: Without dead ends: 4192 [2023-04-02 15:55:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:55:34,944 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 3 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3010 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:34,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3010 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 398 Invalid, 5 Unknown, 0 Unchecked, 11.8s Time] [2023-04-02 15:55:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2023-04-02 15:55:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 4181. [2023-04-02 15:55:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3069 states have (on average 1.4763766699250571) internal successors, (4531), 3169 states have internal predecessors, (4531), 702 states have call successors, (702), 381 states have call predecessors, (702), 409 states have return successors, (970), 642 states have call predecessors, (970), 684 states have call successors, (970) [2023-04-02 15:55:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6203 transitions. [2023-04-02 15:55:35,183 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6203 transitions. Word has length 60 [2023-04-02 15:55:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:35,183 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6203 transitions. [2023-04-02 15:55:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:55:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6203 transitions. [2023-04-02 15:55:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:55:35,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:35,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 15:55:35,185 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:35,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1783876803, now seen corresponding path program 1 times [2023-04-02 15:55:35,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:35,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909112575] [2023-04-02 15:55:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:35,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:35,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909112575] [2023-04-02 15:55:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909112575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:35,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:55:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873086462] [2023-04-02 15:55:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:55:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:55:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:55:35,358 INFO L87 Difference]: Start difference. First operand 4181 states and 6203 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:38,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:40,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:42,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:43,009 INFO L93 Difference]: Finished difference Result 6110 states and 9208 transitions. [2023-04-02 15:55:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:55:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 2 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 [2023-04-02 15:55:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:43,046 INFO L225 Difference]: With dead ends: 6110 [2023-04-02 15:55:43,046 INFO L226 Difference]: Without dead ends: 6045 [2023-04-02 15:55:43,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:55:43,050 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 498 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:43,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1495 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 15:55:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2023-04-02 15:55:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 4573. [2023-04-02 15:55:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 3370 states have (on average 1.485459940652819) internal successors, (5006), 3467 states have internal predecessors, (5006), 758 states have call successors, (758), 417 states have call predecessors, (758), 444 states have return successors, (1037), 700 states have call predecessors, (1037), 740 states have call successors, (1037) [2023-04-02 15:55:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6801 transitions. [2023-04-02 15:55:43,325 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6801 transitions. Word has length 60 [2023-04-02 15:55:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:43,326 INFO L495 AbstractCegarLoop]: Abstraction has 4573 states and 6801 transitions. [2023-04-02 15:55:43,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6801 transitions. [2023-04-02 15:55:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 15:55:43,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:43,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:43,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 15:55:43,328 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:43,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash -83610946, now seen corresponding path program 1 times [2023-04-02 15:55:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:43,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933172642] [2023-04-02 15:55:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:43,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:43,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:43,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933172642] [2023-04-02 15:55:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933172642] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:43,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:43,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:55:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086749328] [2023-04-02 15:55:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:55:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:55:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:55:43,607 INFO L87 Difference]: Start difference. First operand 4573 states and 6801 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:46,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:48,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:50,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:52,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:55:53,266 INFO L93 Difference]: Finished difference Result 8674 states and 13060 transitions. [2023-04-02 15:55:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:55:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 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 61 [2023-04-02 15:55:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:55:53,280 INFO L225 Difference]: With dead ends: 8674 [2023-04-02 15:55:53,280 INFO L226 Difference]: Without dead ends: 4671 [2023-04-02 15:55:53,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:55:53,293 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 3 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:55:53,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2352 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 304 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2023-04-02 15:55:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2023-04-02 15:55:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4619. [2023-04-02 15:55:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3398 states have (on average 1.48145968216598) internal successors, (5034), 3505 states have internal predecessors, (5034), 758 states have call successors, (758), 417 states have call predecessors, (758), 462 states have return successors, (1092), 708 states have call predecessors, (1092), 740 states have call successors, (1092) [2023-04-02 15:55:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 6884 transitions. [2023-04-02 15:55:53,574 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 6884 transitions. Word has length 61 [2023-04-02 15:55:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:55:53,574 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 6884 transitions. [2023-04-02 15:55:53,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 6884 transitions. [2023-04-02 15:55:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 15:55:53,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:55:53,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:55:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 15:55:53,577 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:55:53,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:55:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -83776130, now seen corresponding path program 1 times [2023-04-02 15:55:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:55:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249859611] [2023-04-02 15:55:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:55:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:55:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:55:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:55:53,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:55:53,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249859611] [2023-04-02 15:55:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249859611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:55:53,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:55:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 15:55:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926984049] [2023-04-02 15:55:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:55:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:55:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:55:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:55:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 15:55:53,973 INFO L87 Difference]: Start difference. First operand 4619 states and 6884 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:55:57,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:55:59,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:01,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:03,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:05,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:07,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:09,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:56:10,417 INFO L93 Difference]: Finished difference Result 4643 states and 6939 transitions. [2023-04-02 15:56:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:56:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (10), 2 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 61 [2023-04-02 15:56:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:56:10,428 INFO L225 Difference]: With dead ends: 4643 [2023-04-02 15:56:10,428 INFO L226 Difference]: Without dead ends: 4639 [2023-04-02 15:56:10,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 15:56:10,430 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 4 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:56:10,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4028 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 640 Invalid, 7 Unknown, 0 Unchecked, 16.2s Time] [2023-04-02 15:56:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2023-04-02 15:56:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4629. [2023-04-02 15:56:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 3406 states have (on average 1.4806224310041103) internal successors, (5043), 3514 states have internal predecessors, (5043), 759 states have call successors, (759), 417 states have call predecessors, (759), 463 states have return successors, (1105), 710 states have call predecessors, (1105), 741 states have call successors, (1105) [2023-04-02 15:56:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 6907 transitions. [2023-04-02 15:56:10,711 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 6907 transitions. Word has length 61 [2023-04-02 15:56:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:56:10,711 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 6907 transitions. [2023-04-02 15:56:10,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 15:56:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 6907 transitions. [2023-04-02 15:56:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 15:56:10,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:56:10,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:56:10,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-02 15:56:10,713 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:56:10,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:56:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash -84052960, now seen corresponding path program 1 times [2023-04-02 15:56:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:56:10,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556199348] [2023-04-02 15:56:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:56:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:56:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:56:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:56:11,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:56:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556199348] [2023-04-02 15:56:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556199348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:56:11,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:56:11,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:56:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033534224] [2023-04-02 15:56:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:56:11,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:56:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:56:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:56:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:56:11,018 INFO L87 Difference]: Start difference. First operand 4629 states and 6907 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:56:14,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:16,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:18,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:20,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-02 15:56:22,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []