/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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:21:09,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:21:09,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:21:09,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:21:09,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:21:09,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:21:09,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:21:09,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:21:09,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:21:09,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:21:09,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:21:09,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:21:09,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:21:09,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:21:09,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:21:09,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:21:09,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:21:09,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:21:09,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:21:09,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:21:09,850 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 06:21:09,877 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:21:09,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:21:09,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:21:09,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:21:09,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:21:09,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:21:09,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:21:09,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:21:09,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:21:09,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:21:09,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:21:09,881 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:21:09,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:21:10,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:21:10,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:21:10,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:21:10,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:21:10,123 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:21:10,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:21:11,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:21:11,427 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:21:11,427 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:21:11,435 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e796c98/61b929fadaae44c39daea8a8215adc17/FLAGbd087def5 [2023-04-02 06:21:11,774 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e796c98/61b929fadaae44c39daea8a8215adc17 [2023-04-02 06:21:11,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:21:11,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:21:11,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:21:11,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:21:11,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:21:11,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:21:11" (1/1) ... [2023-04-02 06:21:11,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4411af2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:11, skipping insertion in model container [2023-04-02 06:21:11,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:21:11" (1/1) ... [2023-04-02 06:21:11,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:21:11,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:21:12,035 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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2023-04-02 06:21:12,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:21:12,078 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:21:12,122 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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2023-04-02 06:21:12,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:21:12,168 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:21:12,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12 WrapperNode [2023-04-02 06:21:12,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:21:12,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:21:12,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:21:12,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:21:12,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,234 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:21:12,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:21:12,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:21:12,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:21:12,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (1/1) ... [2023-04-02 06:21:12,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:21:12,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:21:12,267 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 06:21:12,277 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 06:21:12,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:21:12,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:21:12,305 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:21:12,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:21:12,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:21:12,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:21:12,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:21:12,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:21:12,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:21:12,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:21:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:21:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:21:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:21:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:21:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:21:12,474 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:21:12,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:21:13,003 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:21:13,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:21:13,010 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:21:13,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:21:13 BoogieIcfgContainer [2023-04-02 06:21:13,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:21:13,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:21:13,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:21:13,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:21:13,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:21:11" (1/3) ... [2023-04-02 06:21:13,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108695cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:21:13, skipping insertion in model container [2023-04-02 06:21:13,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:21:12" (2/3) ... [2023-04-02 06:21:13,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108695cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:21:13, skipping insertion in model container [2023-04-02 06:21:13,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:21:13" (3/3) ... [2023-04-02 06:21:13,043 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:21:13,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:21:13,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:21:13,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:21:13,117 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;@486e5be6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:21:13,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:21:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 164 states have (on average 1.6951219512195121) internal successors, (278), 165 states have internal predecessors, (278), 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 06:21:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 06:21:13,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:13,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:13,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:13,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -707023044, now seen corresponding path program 1 times [2023-04-02 06:21:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:13,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769624146] [2023-04-02 06:21:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:13,716 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 06:21:13,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:13,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769624146] [2023-04-02 06:21:13,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769624146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:13,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:13,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114511465] [2023-04-02 06:21:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:13,758 INFO L87 Difference]: Start difference. First operand has 170 states, 164 states have (on average 1.6951219512195121) internal successors, (278), 165 states have internal predecessors, (278), 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 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 06:21:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:14,723 INFO L93 Difference]: Finished difference Result 398 states and 640 transitions. [2023-04-02 06:21:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 78 [2023-04-02 06:21:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:14,735 INFO L225 Difference]: With dead ends: 398 [2023-04-02 06:21:14,735 INFO L226 Difference]: Without dead ends: 268 [2023-04-02 06:21:14,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:21:14,741 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 209 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:14,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 602 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:21:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-04-02 06:21:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2023-04-02 06:21:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.5) internal successors, (393), 262 states have internal predecessors, (393), 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 06:21:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 396 transitions. [2023-04-02 06:21:14,800 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 396 transitions. Word has length 78 [2023-04-02 06:21:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:14,800 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 396 transitions. [2023-04-02 06:21:14,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 06:21:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 396 transitions. [2023-04-02 06:21:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 06:21:14,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:14,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:21:14,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:14,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1265369374, now seen corresponding path program 1 times [2023-04-02 06:21:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:14,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568716358] [2023-04-02 06:21:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:15,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:15,114 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 06:21:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568716358] [2023-04-02 06:21:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568716358] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:15,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:15,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063152678] [2023-04-02 06:21:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:15,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:15,118 INFO L87 Difference]: Start difference. First operand 266 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 06:21:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:15,821 INFO L93 Difference]: Finished difference Result 670 states and 1040 transitions. [2023-04-02 06:21:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 79 [2023-04-02 06:21:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:15,824 INFO L225 Difference]: With dead ends: 670 [2023-04-02 06:21:15,825 INFO L226 Difference]: Without dead ends: 452 [2023-04-02 06:21:15,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:21:15,827 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 169 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:15,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 524 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:21:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-04-02 06:21:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2023-04-02 06:21:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 446 states have (on average 1.5381165919282511) internal successors, (686), 446 states have internal predecessors, (686), 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 06:21:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 689 transitions. [2023-04-02 06:21:15,862 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 689 transitions. Word has length 79 [2023-04-02 06:21:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:15,862 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 689 transitions. [2023-04-02 06:21:15,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 06:21:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 689 transitions. [2023-04-02 06:21:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 06:21:15,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:15,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:15,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:21:15,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:15,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash -336871769, now seen corresponding path program 1 times [2023-04-02 06:21:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230348155] [2023-04-02 06:21:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:16,066 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 06:21:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230348155] [2023-04-02 06:21:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230348155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444873549] [2023-04-02 06:21:16,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:16,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:16,069 INFO L87 Difference]: Start difference. First operand 450 states and 689 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 06:21:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:16,687 INFO L93 Difference]: Finished difference Result 1190 states and 1867 transitions. [2023-04-02 06:21:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 80 [2023-04-02 06:21:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:16,690 INFO L225 Difference]: With dead ends: 1190 [2023-04-02 06:21:16,690 INFO L226 Difference]: Without dead ends: 788 [2023-04-02 06:21:16,692 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 06:21:16,693 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 164 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:16,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 509 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:21:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-04-02 06:21:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 786. [2023-04-02 06:21:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 782 states have (on average 1.5575447570332481) internal successors, (1218), 782 states have internal predecessors, (1218), 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 06:21:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1221 transitions. [2023-04-02 06:21:16,739 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1221 transitions. Word has length 80 [2023-04-02 06:21:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:16,739 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1221 transitions. [2023-04-02 06:21:16,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 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 06:21:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1221 transitions. [2023-04-02 06:21:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:21:16,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:16,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:21:16,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:16,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash 229068499, now seen corresponding path program 1 times [2023-04-02 06:21:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750185728] [2023-04-02 06:21:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:16,930 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 06:21:16,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750185728] [2023-04-02 06:21:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750185728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933935863] [2023-04-02 06:21:16,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:16,932 INFO L87 Difference]: Start difference. First operand 786 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 06:21:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:17,562 INFO L93 Difference]: Finished difference Result 2134 states and 3359 transitions. [2023-04-02 06:21:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 81 [2023-04-02 06:21:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:17,567 INFO L225 Difference]: With dead ends: 2134 [2023-04-02 06:21:17,568 INFO L226 Difference]: Without dead ends: 1396 [2023-04-02 06:21:17,569 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 06:21:17,570 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 159 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:17,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 494 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:21:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2023-04-02 06:21:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1394. [2023-04-02 06:21:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1390 states have (on average 1.5640287769784174) internal successors, (2174), 1390 states have internal predecessors, (2174), 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 06:21:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2177 transitions. [2023-04-02 06:21:17,650 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2177 transitions. Word has length 81 [2023-04-02 06:21:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 2177 transitions. [2023-04-02 06:21:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 06:21:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2177 transitions. [2023-04-02 06:21:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 06:21:17,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:17,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:17,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:21:17,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:17,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -27331546, now seen corresponding path program 1 times [2023-04-02 06:21:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937779913] [2023-04-02 06:21:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:17,874 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 06:21:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937779913] [2023-04-02 06:21:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937779913] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:17,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:17,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397917511] [2023-04-02 06:21:17,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:17,876 INFO L87 Difference]: Start difference. First operand 1394 states and 2177 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 06:21:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:18,527 INFO L93 Difference]: Finished difference Result 3830 states and 6019 transitions. [2023-04-02 06:21:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 82 [2023-04-02 06:21:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:18,536 INFO L225 Difference]: With dead ends: 3830 [2023-04-02 06:21:18,536 INFO L226 Difference]: Without dead ends: 2484 [2023-04-02 06:21:18,539 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 06:21:18,539 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 154 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:18,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 479 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:21:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2023-04-02 06:21:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2482. [2023-04-02 06:21:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2478 states have (on average 1.5617433414043584) internal successors, (3870), 2478 states have internal predecessors, (3870), 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 06:21:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3873 transitions. [2023-04-02 06:21:18,679 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3873 transitions. Word has length 82 [2023-04-02 06:21:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 3873 transitions. [2023-04-02 06:21:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 06:21:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3873 transitions. [2023-04-02 06:21:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:21:18,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:18,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:21:18,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:21:18,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:18,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash -195426660, now seen corresponding path program 1 times [2023-04-02 06:21:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:18,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376479827] [2023-04-02 06:21:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:19,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:19,081 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 06:21:19,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:19,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376479827] [2023-04-02 06:21:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376479827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:19,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 06:21:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272046745] [2023-04-02 06:21:19,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 06:21:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 06:21:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:21:19,083 INFO L87 Difference]: Start difference. First operand 2482 states and 3873 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 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 06:21:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:20,790 INFO L93 Difference]: Finished difference Result 19520 states and 30648 transitions. [2023-04-02 06:21:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 06:21:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 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 83 [2023-04-02 06:21:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:20,848 INFO L225 Difference]: With dead ends: 19520 [2023-04-02 06:21:20,849 INFO L226 Difference]: Without dead ends: 17086 [2023-04-02 06:21:20,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:21:20,858 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 2607 mSDsluCounter, 3049 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2607 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:20,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2607 Valid, 3281 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:21:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17086 states. [2023-04-02 06:21:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17086 to 4914. [2023-04-02 06:21:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 4910 states have (on average 1.5539714867617107) internal successors, (7630), 4910 states have internal predecessors, (7630), 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 06:21:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 7633 transitions. [2023-04-02 06:21:21,471 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 7633 transitions. Word has length 83 [2023-04-02 06:21:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:21,471 INFO L495 AbstractCegarLoop]: Abstraction has 4914 states and 7633 transitions. [2023-04-02 06:21:21,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 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 06:21:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 7633 transitions. [2023-04-02 06:21:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-02 06:21:21,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:21,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:21,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:21:21,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:21,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1781791837, now seen corresponding path program 1 times [2023-04-02 06:21:21,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:21,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357538919] [2023-04-02 06:21:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:21,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:21,892 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 06:21:21,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:21,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357538919] [2023-04-02 06:21:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357538919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:21,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:21,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 06:21:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136720714] [2023-04-02 06:21:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 06:21:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 06:21:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:21:21,895 INFO L87 Difference]: Start difference. First operand 4914 states and 7633 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 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 06:21:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:26,260 INFO L93 Difference]: Finished difference Result 30110 states and 46551 transitions. [2023-04-02 06:21:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:21:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 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 84 [2023-04-02 06:21:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:26,337 INFO L225 Difference]: With dead ends: 30110 [2023-04-02 06:21:26,337 INFO L226 Difference]: Without dead ends: 25244 [2023-04-02 06:21:26,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:21:26,355 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 980 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:26,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 2036 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 06:21:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25244 states. [2023-04-02 06:21:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25244 to 25234. [2023-04-02 06:21:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25234 states, 25230 states have (on average 1.5415774871185097) internal successors, (38894), 25230 states have internal predecessors, (38894), 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 06:21:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25234 states to 25234 states and 38897 transitions. [2023-04-02 06:21:29,770 INFO L78 Accepts]: Start accepts. Automaton has 25234 states and 38897 transitions. Word has length 84 [2023-04-02 06:21:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 25234 states and 38897 transitions. [2023-04-02 06:21:29,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 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 06:21:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 25234 states and 38897 transitions. [2023-04-02 06:21:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 06:21:29,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:29,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:21:29,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:29,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash 995159187, now seen corresponding path program 1 times [2023-04-02 06:21:29,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403438890] [2023-04-02 06:21:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:30,018 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 06:21:30,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:30,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403438890] [2023-04-02 06:21:30,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403438890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:30,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:30,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:21:30,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183845490] [2023-04-02 06:21:30,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:30,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:21:30,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:21:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:21:30,020 INFO L87 Difference]: Start difference. First operand 25234 states and 38897 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 06:21:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:36,336 INFO L93 Difference]: Finished difference Result 69014 states and 105971 transitions. [2023-04-02 06:21:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:21:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 85 [2023-04-02 06:21:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:36,444 INFO L225 Difference]: With dead ends: 69014 [2023-04-02 06:21:36,444 INFO L226 Difference]: Without dead ends: 43828 [2023-04-02 06:21:36,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:21:36,484 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 176 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:36,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 564 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:21:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43828 states. [2023-04-02 06:21:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43828 to 43826. [2023-04-02 06:21:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43826 states, 43822 states have (on average 1.522842407922961) internal successors, (66734), 43822 states have internal predecessors, (66734), 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 06:21:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43826 states to 43826 states and 66737 transitions. [2023-04-02 06:21:42,459 INFO L78 Accepts]: Start accepts. Automaton has 43826 states and 66737 transitions. Word has length 85 [2023-04-02 06:21:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:21:42,459 INFO L495 AbstractCegarLoop]: Abstraction has 43826 states and 66737 transitions. [2023-04-02 06:21:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 06:21:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 43826 states and 66737 transitions. [2023-04-02 06:21:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 06:21:42,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:21:42,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:21:42,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:21:42,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:21:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1093246778, now seen corresponding path program 1 times [2023-04-02 06:21:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:21:42,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116340973] [2023-04-02 06:21:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:21:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:21:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:42,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:21:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:21:42,707 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 06:21:42,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:21:42,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116340973] [2023-04-02 06:21:42,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116340973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:21:42,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:21:42,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:21:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383096960] [2023-04-02 06:21:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:21:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:21:42,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:21:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:21:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:21:42,711 INFO L87 Difference]: Start difference. First operand 43826 states and 66737 transitions. Second operand has 6 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 06:21:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:21:54,396 INFO L93 Difference]: Finished difference Result 125046 states and 190579 transitions. [2023-04-02 06:21:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:21:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 86 [2023-04-02 06:21:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:21:54,589 INFO L225 Difference]: With dead ends: 125046 [2023-04-02 06:21:54,590 INFO L226 Difference]: Without dead ends: 81268 [2023-04-02 06:21:54,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:21:54,648 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1009 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:21:54,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 266 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:21:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81268 states. [2023-04-02 06:22:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81268 to 81266. [2023-04-02 06:22:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81266 states, 81262 states have (on average 1.5158622726489626) internal successors, (123182), 81262 states have internal predecessors, (123182), 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 06:22:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81266 states to 81266 states and 123185 transitions. [2023-04-02 06:22:05,915 INFO L78 Accepts]: Start accepts. Automaton has 81266 states and 123185 transitions. Word has length 86 [2023-04-02 06:22:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:05,915 INFO L495 AbstractCegarLoop]: Abstraction has 81266 states and 123185 transitions. [2023-04-02 06:22:05,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 06:22:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 81266 states and 123185 transitions. [2023-04-02 06:22:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 06:22:05,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:05,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:05,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:22:05,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:05,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 522830197, now seen corresponding path program 1 times [2023-04-02 06:22:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786871281] [2023-04-02 06:22:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:06,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:06,263 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 06:22:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786871281] [2023-04-02 06:22:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786871281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:22:06,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905498303] [2023-04-02 06:22:06,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:06,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:22:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:22:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:22:06,265 INFO L87 Difference]: Start difference. First operand 81266 states and 123185 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 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 06:22:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:28,412 INFO L93 Difference]: Finished difference Result 165300 states and 249138 transitions. [2023-04-02 06:22:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:22:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 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 86 [2023-04-02 06:22:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:28,971 INFO L225 Difference]: With dead ends: 165300 [2023-04-02 06:22:28,971 INFO L226 Difference]: Without dead ends: 165298 [2023-04-02 06:22:29,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:22:29,019 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 364 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:29,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1156 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:22:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165298 states. [2023-04-02 06:22:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165298 to 84082. [2023-04-02 06:22:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84082 states, 84078 states have (on average 1.4985846475891433) internal successors, (125998), 84078 states have internal predecessors, (125998), 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 06:22:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84082 states to 84082 states and 126001 transitions. [2023-04-02 06:22:42,593 INFO L78 Accepts]: Start accepts. Automaton has 84082 states and 126001 transitions. Word has length 86 [2023-04-02 06:22:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:22:42,593 INFO L495 AbstractCegarLoop]: Abstraction has 84082 states and 126001 transitions. [2023-04-02 06:22:42,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 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 06:22:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 84082 states and 126001 transitions. [2023-04-02 06:22:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 06:22:42,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:22:42,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:42,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:22:42,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:22:42,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:22:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -962513255, now seen corresponding path program 1 times [2023-04-02 06:22:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:22:42,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074077212] [2023-04-02 06:22:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:22:42,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:22:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:42,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:22:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:22:42,807 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 06:22:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:22:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074077212] [2023-04-02 06:22:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074077212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:22:42,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:22:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:22:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266080283] [2023-04-02 06:22:42,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:22:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:22:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:22:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:22:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:22:42,809 INFO L87 Difference]: Start difference. First operand 84082 states and 126001 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 06:22:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:22:59,482 INFO L93 Difference]: Finished difference Result 189720 states and 283813 transitions. [2023-04-02 06:22:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:22:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 87 [2023-04-02 06:22:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:22:59,692 INFO L225 Difference]: With dead ends: 189720 [2023-04-02 06:22:59,692 INFO L226 Difference]: Without dead ends: 105686 [2023-04-02 06:22:59,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:22:59,773 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 141 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:22:59,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 418 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:22:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105686 states. [2023-04-02 06:23:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105686 to 105332. [2023-04-02 06:23:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105332 states, 105328 states have (on average 1.4886829712896856) internal successors, (156800), 105328 states have internal predecessors, (156800), 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 06:23:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105332 states to 105332 states and 156803 transitions. [2023-04-02 06:23:16,606 INFO L78 Accepts]: Start accepts. Automaton has 105332 states and 156803 transitions. Word has length 87 [2023-04-02 06:23:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:23:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 105332 states and 156803 transitions. [2023-04-02 06:23:16,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 06:23:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 105332 states and 156803 transitions. [2023-04-02 06:23:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 06:23:16,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:23:16,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:23:16,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:23:16,640 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:23:16,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:23:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1150775166, now seen corresponding path program 1 times [2023-04-02 06:23:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:23:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603489706] [2023-04-02 06:23:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:23:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:23:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:23:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:23:17,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603489706] [2023-04-02 06:23:17,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603489706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:23:17,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336353036] [2023-04-02 06:23:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:23:17,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:23:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:23:17,095 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 06:23:17,100 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 06:23:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:23:17,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:23:17,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:23:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:23:17,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:23:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:23:17,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336353036] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:23:17,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:23:17,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-04-02 06:23:17,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253094928] [2023-04-02 06:23:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:23:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:23:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:23:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:23:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:23:17,690 INFO L87 Difference]: Start difference. First operand 105332 states and 156803 transitions. Second operand has 15 states, 15 states have (on average 22.133333333333333) internal successors, (332), 14 states have internal predecessors, (332), 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)