/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:22:49,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:22:49,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:22:49,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:22:49,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:22:49,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:22:49,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:22:49,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:22:49,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:22:49,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:22:49,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:22:49,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:22:49,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:22:49,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:22:49,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:22:49,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:22:49,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:22:49,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:22:49,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:22:49,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:22:49,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:22:49,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:22:49,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:22:49,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:22:49,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:22:49,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:22:49,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:22:49,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:22:49,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:22:49,888 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:22:49,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:22:49,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:22:49,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:22:49,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:22:49,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:22:49,890 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:22:49,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:22:49,891 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:22:49,891 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:22:50,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:22:50,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:22:50,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:22:50,122 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:22:50,123 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:22:50,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:22:51,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:22:51,286 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:22:51,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:22:51,293 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2eabae71/fb3725ea0d884c1aa84fe07b3670dee0/FLAG4a5bad2bf [2023-04-02 06:22:51,310 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2eabae71/fb3725ea0d884c1aa84fe07b3670dee0 [2023-04-02 06:22:51,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:22:51,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:22:51,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:22:51,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:22:51,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:22:51,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a370ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51, skipping insertion in model container [2023-04-02 06:22:51,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:22:51,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:22:51,505 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-04-02 06:22:51,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:22:51,527 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:22:51,553 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-04-02 06:22:51,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:22:51,575 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:22:51,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51 WrapperNode [2023-04-02 06:22:51,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:22:51,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:22:51,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:22:51,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:22:51,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,608 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:22:51,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:22:51,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:22:51,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:22:51,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (1/1) ... [2023-04-02 06:22:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:22:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:22:51,638 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 06:22:51,648 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 06:22:51,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:22:51,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:22:51,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:22:51,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:22:51,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:22:51,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:22:51,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:22:51,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:22:51,676 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:22:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:22:51,762 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:22:51,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:22:52,061 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:22:52,066 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:22:52,066 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:22:52,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:22:52 BoogieIcfgContainer [2023-04-02 06:22:52,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:22:52,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:22:52,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:22:52,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:22:52,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:22:51" (1/3) ... [2023-04-02 06:22:52,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbc59cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:22:52, skipping insertion in model container [2023-04-02 06:22:52,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:22:51" (2/3) ... [2023-04-02 06:22:52,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbc59cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:22:52, skipping insertion in model container [2023-04-02 06:22:52,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:22:52" (3/3) ... [2023-04-02 06:22:52,074 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:22:52,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:22:52,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:22:52,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:22:52,128 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=PETRI_NET, 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;@23064dd1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:22:52,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:22:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 65 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:22:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 06:22:52,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:52,138 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] [2023-04-02 06:22:52,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:52,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash -310817290, now seen corresponding path program 1 times [2023-04-02 06:22:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38875298] [2023-04-02 06:22:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:52,607 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 06:22:52,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:52,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38875298] [2023-04-02 06:22:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38875298] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:52,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:22:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856527586] [2023-04-02 06:22:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:52,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:22:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:22:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:22:52,649 INFO L87 Difference]: Start difference. First operand has 70 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 65 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:53,013 INFO L93 Difference]: Finished difference Result 156 states and 237 transitions. [2023-04-02 06:22:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:22:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-02 06:22:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:53,028 INFO L225 Difference]: With dead ends: 156 [2023-04-02 06:22:53,028 INFO L226 Difference]: Without dead ends: 97 [2023-04-02 06:22:53,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:22:53,042 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:53,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 221 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:22:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-02 06:22:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-04-02 06:22:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.4395604395604396) internal successors, (131), 91 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 134 transitions. [2023-04-02 06:22:53,099 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 134 transitions. Word has length 41 [2023-04-02 06:22:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:53,100 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 134 transitions. [2023-04-02 06:22:53,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 134 transitions. [2023-04-02 06:22:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 06:22:53,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:53,102 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] [2023-04-02 06:22:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:22:53,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:53,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1509343556, now seen corresponding path program 1 times [2023-04-02 06:22:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85793283] [2023-04-02 06:22:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:53,261 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 06:22:53,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85793283] [2023-04-02 06:22:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85793283] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:53,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:53,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:22:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853409289] [2023-04-02 06:22:53,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:22:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:22:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:22:53,264 INFO L87 Difference]: Start difference. First operand 95 states and 134 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:53,518 INFO L93 Difference]: Finished difference Result 223 states and 330 transitions. [2023-04-02 06:22:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:22:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-02 06:22:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:53,520 INFO L225 Difference]: With dead ends: 223 [2023-04-02 06:22:53,520 INFO L226 Difference]: Without dead ends: 151 [2023-04-02 06:22:53,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:22:53,522 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:53,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 171 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-04-02 06:22:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2023-04-02 06:22:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.4689655172413794) internal successors, (213), 145 states have internal predecessors, (213), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 216 transitions. [2023-04-02 06:22:53,540 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 216 transitions. Word has length 42 [2023-04-02 06:22:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 216 transitions. [2023-04-02 06:22:53,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 216 transitions. [2023-04-02 06:22:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 06:22:53,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:53,544 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] [2023-04-02 06:22:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:22:53,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:53,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash -950835862, now seen corresponding path program 1 times [2023-04-02 06:22:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47705808] [2023-04-02 06:22:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:53,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:53,753 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 06:22:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47705808] [2023-04-02 06:22:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47705808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222324905] [2023-04-02 06:22:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:53,757 INFO L87 Difference]: Start difference. First operand 149 states and 216 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:54,063 INFO L93 Difference]: Finished difference Result 905 states and 1374 transitions. [2023-04-02 06:22:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:22:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-02 06:22:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:54,070 INFO L225 Difference]: With dead ends: 905 [2023-04-02 06:22:54,071 INFO L226 Difference]: Without dead ends: 779 [2023-04-02 06:22:54,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:22:54,078 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 357 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:54,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 606 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-04-02 06:22:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 273. [2023-04-02 06:22:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.4907063197026023) internal successors, (401), 269 states have internal predecessors, (401), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 404 transitions. [2023-04-02 06:22:54,127 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 404 transitions. Word has length 43 [2023-04-02 06:22:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:54,127 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 404 transitions. [2023-04-02 06:22:54,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 404 transitions. [2023-04-02 06:22:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 06:22:54,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:54,129 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 06:22:54,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:22:54,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:54,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash 181576965, now seen corresponding path program 1 times [2023-04-02 06:22:54,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:54,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213565791] [2023-04-02 06:22:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:54,245 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 06:22:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:54,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213565791] [2023-04-02 06:22:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213565791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:54,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:54,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:22:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146894024] [2023-04-02 06:22:54,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:22:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:22:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:22:54,247 INFO L87 Difference]: Start difference. First operand 273 states and 404 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:54,448 INFO L93 Difference]: Finished difference Result 737 states and 1106 transitions. [2023-04-02 06:22:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:22:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-02 06:22:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:54,452 INFO L225 Difference]: With dead ends: 737 [2023-04-02 06:22:54,452 INFO L226 Difference]: Without dead ends: 487 [2023-04-02 06:22:54,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:22:54,461 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:54,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 141 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-04-02 06:22:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 477. [2023-04-02 06:22:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 473 states have (on average 1.4735729386892178) internal successors, (697), 473 states have internal predecessors, (697), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 700 transitions. [2023-04-02 06:22:54,527 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 700 transitions. Word has length 45 [2023-04-02 06:22:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:54,528 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 700 transitions. [2023-04-02 06:22:54,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 700 transitions. [2023-04-02 06:22:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 06:22:54,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:54,529 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 06:22:54,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:22:54,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:54,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 201626308, now seen corresponding path program 1 times [2023-04-02 06:22:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696522528] [2023-04-02 06:22:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:54,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:54,776 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 06:22:54,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:54,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696522528] [2023-04-02 06:22:54,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696522528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:54,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:54,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:54,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387317116] [2023-04-02 06:22:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:54,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:54,785 INFO L87 Difference]: Start difference. First operand 477 states and 700 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:55,019 INFO L93 Difference]: Finished difference Result 933 states and 1378 transitions. [2023-04-02 06:22:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:55,019 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-02 06:22:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:55,021 INFO L225 Difference]: With dead ends: 933 [2023-04-02 06:22:55,021 INFO L226 Difference]: Without dead ends: 479 [2023-04-02 06:22:55,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:22:55,023 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:55,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 267 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-04-02 06:22:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2023-04-02 06:22:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 473 states have (on average 1.4566596194503172) internal successors, (689), 473 states have internal predecessors, (689), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 692 transitions. [2023-04-02 06:22:55,071 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 692 transitions. Word has length 45 [2023-04-02 06:22:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:55,073 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 692 transitions. [2023-04-02 06:22:55,073 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 692 transitions. [2023-04-02 06:22:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:22:55,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:55,077 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 06:22:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:22:55,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:55,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash -379255383, now seen corresponding path program 1 times [2023-04-02 06:22:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:55,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174554653] [2023-04-02 06:22:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:55,169 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 06:22:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174554653] [2023-04-02 06:22:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174554653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:55,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:55,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:22:55,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987177743] [2023-04-02 06:22:55,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:55,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:22:55,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:22:55,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:22:55,172 INFO L87 Difference]: Start difference. First operand 477 states and 692 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:55,444 INFO L93 Difference]: Finished difference Result 900 states and 1322 transitions. [2023-04-02 06:22:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:22:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-02 06:22:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:55,446 INFO L225 Difference]: With dead ends: 900 [2023-04-02 06:22:55,446 INFO L226 Difference]: Without dead ends: 649 [2023-04-02 06:22:55,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:22:55,448 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 53 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:55,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-04-02 06:22:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2023-04-02 06:22:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 643 states have (on average 1.447900466562986) internal successors, (931), 643 states have internal predecessors, (931), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 934 transitions. [2023-04-02 06:22:55,504 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 934 transitions. Word has length 46 [2023-04-02 06:22:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:55,505 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 934 transitions. [2023-04-02 06:22:55,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 934 transitions. [2023-04-02 06:22:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:22:55,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:55,505 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 06:22:55,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:22:55,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:55,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1953538837, now seen corresponding path program 1 times [2023-04-02 06:22:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625271020] [2023-04-02 06:22:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:55,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:55,658 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 06:22:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:55,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625271020] [2023-04-02 06:22:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625271020] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:55,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:22:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837676826] [2023-04-02 06:22:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:55,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:55,660 INFO L87 Difference]: Start difference. First operand 647 states and 934 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:55,952 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2023-04-02 06:22:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-02 06:22:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:55,955 INFO L225 Difference]: With dead ends: 1269 [2023-04-02 06:22:55,955 INFO L226 Difference]: Without dead ends: 647 [2023-04-02 06:22:55,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:22:55,957 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 189 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:55,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 75 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-04-02 06:22:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2023-04-02 06:22:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 643 states have (on average 1.4292379471228616) internal successors, (919), 643 states have internal predecessors, (919), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 922 transitions. [2023-04-02 06:22:56,018 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 922 transitions. Word has length 46 [2023-04-02 06:22:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:56,019 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 922 transitions. [2023-04-02 06:22:56,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 922 transitions. [2023-04-02 06:22:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:22:56,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:56,019 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 06:22:56,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:22:56,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:56,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1424248336, now seen corresponding path program 1 times [2023-04-02 06:22:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:56,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81616842] [2023-04-02 06:22:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:56,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:56,148 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 06:22:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81616842] [2023-04-02 06:22:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81616842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:56,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:56,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:22:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192211493] [2023-04-02 06:22:56,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:56,150 INFO L87 Difference]: Start difference. First operand 647 states and 922 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:56,474 INFO L93 Difference]: Finished difference Result 1687 states and 2428 transitions. [2023-04-02 06:22:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-02 06:22:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:56,478 INFO L225 Difference]: With dead ends: 1687 [2023-04-02 06:22:56,478 INFO L226 Difference]: Without dead ends: 1065 [2023-04-02 06:22:56,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:22:56,480 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 335 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:56,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 93 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-04-02 06:22:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1063. [2023-04-02 06:22:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1059 states have (on average 1.4268177525967893) internal successors, (1511), 1059 states have internal predecessors, (1511), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1514 transitions. [2023-04-02 06:22:56,576 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1514 transitions. Word has length 46 [2023-04-02 06:22:56,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:56,577 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1514 transitions. [2023-04-02 06:22:56,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1514 transitions. [2023-04-02 06:22:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:22:56,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:56,577 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] [2023-04-02 06:22:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:22:56,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:56,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1552333643, now seen corresponding path program 1 times [2023-04-02 06:22:56,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:56,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402399958] [2023-04-02 06:22:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:56,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:56,806 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 06:22:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:56,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402399958] [2023-04-02 06:22:56,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402399958] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:56,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:56,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:56,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70432614] [2023-04-02 06:22:56,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:56,808 INFO L87 Difference]: Start difference. First operand 1063 states and 1514 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:57,117 INFO L93 Difference]: Finished difference Result 1603 states and 2272 transitions. [2023-04-02 06:22:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-02 06:22:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:57,122 INFO L225 Difference]: With dead ends: 1603 [2023-04-02 06:22:57,122 INFO L226 Difference]: Without dead ends: 1601 [2023-04-02 06:22:57,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:22:57,125 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 111 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:57,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 380 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:22:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-04-02 06:22:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1095. [2023-04-02 06:22:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1091 states have (on average 1.3959670027497708) internal successors, (1523), 1091 states have internal predecessors, (1523), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1526 transitions. [2023-04-02 06:22:57,246 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1526 transitions. Word has length 46 [2023-04-02 06:22:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:57,246 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1526 transitions. [2023-04-02 06:22:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1526 transitions. [2023-04-02 06:22:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:22:57,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:57,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:22:57,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:22:57,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:57,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2103834166, now seen corresponding path program 1 times [2023-04-02 06:22:57,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:57,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849168424] [2023-04-02 06:22:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:22:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849168424] [2023-04-02 06:22:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849168424] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:57,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094712525] [2023-04-02 06:22:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:57,402 INFO L87 Difference]: Start difference. First operand 1095 states and 1526 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:58,043 INFO L93 Difference]: Finished difference Result 4621 states and 6459 transitions. [2023-04-02 06:22:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:22:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:58,053 INFO L225 Difference]: With dead ends: 4621 [2023-04-02 06:22:58,054 INFO L226 Difference]: Without dead ends: 3551 [2023-04-02 06:22:58,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:22:58,057 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 211 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:58,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 356 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:22:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2023-04-02 06:22:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2163. [2023-04-02 06:22:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2159 states have (on average 1.3909217230199167) internal successors, (3003), 2159 states have internal predecessors, (3003), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3006 transitions. [2023-04-02 06:22:58,305 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3006 transitions. Word has length 65 [2023-04-02 06:22:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:58,305 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3006 transitions. [2023-04-02 06:22:58,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3006 transitions. [2023-04-02 06:22:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:22:58,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:58,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:22:58,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:22:58,307 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:58,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2080088944, now seen corresponding path program 1 times [2023-04-02 06:22:58,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:58,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590863466] [2023-04-02 06:22:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 06:22:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590863466] [2023-04-02 06:22:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590863466] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:58,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495218653] [2023-04-02 06:22:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:58,432 INFO L87 Difference]: Start difference. First operand 2163 states and 3006 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:59,185 INFO L93 Difference]: Finished difference Result 5689 states and 7939 transitions. [2023-04-02 06:22:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:59,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:22:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:59,201 INFO L225 Difference]: With dead ends: 5689 [2023-04-02 06:22:59,201 INFO L226 Difference]: Without dead ends: 4619 [2023-04-02 06:22:59,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:22:59,206 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 214 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:59,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 365 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:22:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2023-04-02 06:22:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 3751. [2023-04-02 06:22:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3747 states have (on average 1.384841206298372) internal successors, (5189), 3747 states have internal predecessors, (5189), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 5192 transitions. [2023-04-02 06:22:59,639 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 5192 transitions. Word has length 65 [2023-04-02 06:22:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:59,639 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 5192 transitions. [2023-04-02 06:22:59,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:22:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 5192 transitions. [2023-04-02 06:22:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:22:59,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:59,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:22:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:22:59,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:59,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1672095355, now seen corresponding path program 1 times [2023-04-02 06:22:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930225243] [2023-04-02 06:22:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:59,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:22:59,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:59,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930225243] [2023-04-02 06:22:59,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930225243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:59,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093038789] [2023-04-02 06:22:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:59,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:59,766 INFO L87 Difference]: Start difference. First operand 3751 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:00,694 INFO L93 Difference]: Finished difference Result 6349 states and 8867 transitions. [2023-04-02 06:23:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:23:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:23:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:00,712 INFO L225 Difference]: With dead ends: 6349 [2023-04-02 06:23:00,712 INFO L226 Difference]: Without dead ends: 5483 [2023-04-02 06:23:00,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:23:00,716 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 203 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 395 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:23:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2023-04-02 06:23:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 4615. [2023-04-02 06:23:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4615 states, 4611 states have (on average 1.3873346345695077) internal successors, (6397), 4611 states have internal predecessors, (6397), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 6400 transitions. [2023-04-02 06:23:01,260 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 6400 transitions. Word has length 66 [2023-04-02 06:23:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:01,261 INFO L495 AbstractCegarLoop]: Abstraction has 4615 states and 6400 transitions. [2023-04-02 06:23:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 6400 transitions. [2023-04-02 06:23:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:23:01,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:01,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:23:01,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:01,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1957571589, now seen corresponding path program 1 times [2023-04-02 06:23:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171056590] [2023-04-02 06:23:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:01,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:01,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171056590] [2023-04-02 06:23:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171056590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:23:01,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:23:01,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:23:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507092748] [2023-04-02 06:23:01,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:23:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:23:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:23:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:23:01,388 INFO L87 Difference]: Start difference. First operand 4615 states and 6400 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:23:01,937 INFO L93 Difference]: Finished difference Result 8517 states and 11853 transitions. [2023-04-02 06:23:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:23:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:23:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:23:01,948 INFO L225 Difference]: With dead ends: 8517 [2023-04-02 06:23:01,948 INFO L226 Difference]: Without dead ends: 3927 [2023-04-02 06:23:01,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:23:01,955 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:23:01,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 175 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:23:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-04-02 06:23:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3925. [2023-04-02 06:23:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3921 states have (on average 1.3774547309359857) internal successors, (5401), 3921 states have internal predecessors, (5401), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 5404 transitions. [2023-04-02 06:23:02,457 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 5404 transitions. Word has length 67 [2023-04-02 06:23:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:02,457 INFO L495 AbstractCegarLoop]: Abstraction has 3925 states and 5404 transitions. [2023-04-02 06:23:02,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:23:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 5404 transitions. [2023-04-02 06:23:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:23:02,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:02,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:23:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:23:02,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:02,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1021568462, now seen corresponding path program 1 times [2023-04-02 06:23:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256314079] [2023-04-02 06:23:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:02,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256314079] [2023-04-02 06:23:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256314079] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:23:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834996730] [2023-04-02 06:23:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:02,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:23:02,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:23:02,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:23:02,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:23:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:03,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 06:23:03,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:23:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:05,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:23:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:07,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834996730] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:23:07,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:23:07,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 17] total 42 [2023-04-02 06:23:07,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23197882] [2023-04-02 06:23:07,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:23:07,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-02 06:23:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-02 06:23:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 06:23:07,376 INFO L87 Difference]: Start difference. First operand 3925 states and 5404 transitions. Second operand has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 41 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)