/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.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:14:24,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:14:24,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:14:24,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:14:24,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:14:24,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:14:24,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:14:24,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:14:24,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:14:24,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:14:24,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:14:24,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:14:24,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:14:24,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:14:24,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:14:24,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:14:24,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:14:24,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:14:24,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:14:24,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:14:24,598 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 06:14:24,629 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:14:24,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:14:24,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:14:24,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:14:24,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:14:24,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:14:24,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:14:24,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:14:24,633 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:14:24,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:14:24,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:14:24,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:14:24,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:14:24,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:14:24,636 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:14:24,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:14:24,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:14:24,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:14:24,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:14:24,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:14:24,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:14:24,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:14:24,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:14:24,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:14:24,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:14:24,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:14:24,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:14:24,639 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:14:24,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:14:24,639 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:14:24,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:14:24,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:14:24,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:14:24,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:14:24,911 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:14:24,911 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:14:24,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:14:26,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:14:26,530 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:14:26,531 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:14:26,541 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233ef9390/84d8e6d7b87144848e7333c3b002e110/FLAG516f750b5 [2023-04-02 06:14:26,558 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233ef9390/84d8e6d7b87144848e7333c3b002e110 [2023-04-02 06:14:26,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:14:26,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:14:26,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:14:26,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:14:26,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:14:26,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:26,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aec5058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26, skipping insertion in model container [2023-04-02 06:14:26,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:26,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:14:26,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:14:26,795 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.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2023-04-02 06:14:26,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:14:26,861 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:14:26,917 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.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2023-04-02 06:14:26,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:14:26,973 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:14:26,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26 WrapperNode [2023-04-02 06:14:26,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:14:26,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:14:26,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:14:26,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:14:26,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:26,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:14:27,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:14:27,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:14:27,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:14:27,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (1/1) ... [2023-04-02 06:14:27,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:14:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:14:27,089 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 06:14:27,113 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 06:14:27,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:14:27,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:14:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:14:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:14:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:14:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:14:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:14:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:14:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:14:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:14:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:14:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:14:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:14:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:14:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:14:27,316 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:14:27,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:14:27,799 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:14:27,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:14:27,810 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:14:27,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:14:27 BoogieIcfgContainer [2023-04-02 06:14:27,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:14:27,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:14:27,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:14:27,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:14:27,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:14:26" (1/3) ... [2023-04-02 06:14:27,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d123ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:14:27, skipping insertion in model container [2023-04-02 06:14:27,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:14:26" (2/3) ... [2023-04-02 06:14:27,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d123ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:14:27, skipping insertion in model container [2023-04-02 06:14:27,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:14:27" (3/3) ... [2023-04-02 06:14:27,819 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:14:27,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:14:27,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:14:27,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:14:27,893 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;@5a81203b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:14:27,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:14:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 130 states have (on average 1.7) internal successors, (221), 131 states have internal predecessors, (221), 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 06:14:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:14:27,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:27,909 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] [2023-04-02 06:14:27,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:27,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1605455070, now seen corresponding path program 1 times [2023-04-02 06:14:27,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:27,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543214558] [2023-04-02 06:14:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:28,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:28,432 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 06:14:28,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543214558] [2023-04-02 06:14:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543214558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:14:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273714409] [2023-04-02 06:14:28,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:28,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:14:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:14:28,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:14:28,499 INFO L87 Difference]: Start difference. First operand has 136 states, 130 states have (on average 1.7) internal successors, (221), 131 states have internal predecessors, (221), 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 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:14:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:29,227 INFO L93 Difference]: Finished difference Result 319 states and 513 transitions. [2023-04-02 06:14:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:14:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-02 06:14:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:29,235 INFO L225 Difference]: With dead ends: 319 [2023-04-02 06:14:29,236 INFO L226 Difference]: Without dead ends: 214 [2023-04-02 06:14:29,238 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 06:14:29,240 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 170 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:29,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 506 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:14:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-04-02 06:14:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2023-04-02 06:14:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.5) internal successors, (312), 208 states have internal predecessors, (312), 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 06:14:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 315 transitions. [2023-04-02 06:14:29,314 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 315 transitions. Word has length 64 [2023-04-02 06:14:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:29,316 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 315 transitions. [2023-04-02 06:14:29,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:14:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 315 transitions. [2023-04-02 06:14:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:14:29,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:29,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:14:29,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:14:29,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:29,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash -856566807, now seen corresponding path program 1 times [2023-04-02 06:14:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932801125] [2023-04-02 06:14:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:29,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:29,556 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 06:14:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932801125] [2023-04-02 06:14:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932801125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:29,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:29,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:14:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207881211] [2023-04-02 06:14:29,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:14:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:14:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:14:29,560 INFO L87 Difference]: Start difference. First operand 212 states and 315 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:14:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:30,072 INFO L93 Difference]: Finished difference Result 526 states and 815 transitions. [2023-04-02 06:14:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:14:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-02 06:14:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:30,075 INFO L225 Difference]: With dead ends: 526 [2023-04-02 06:14:30,075 INFO L226 Difference]: Without dead ends: 353 [2023-04-02 06:14:30,076 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 06:14:30,077 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 135 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:30,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 431 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:14:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-04-02 06:14:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2023-04-02 06:14:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.5360230547550433) internal successors, (533), 347 states have internal predecessors, (533), 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 06:14:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 536 transitions. [2023-04-02 06:14:30,102 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 536 transitions. Word has length 64 [2023-04-02 06:14:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:30,102 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 536 transitions. [2023-04-02 06:14:30,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 06:14:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 536 transitions. [2023-04-02 06:14:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:14:30,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:30,103 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] [2023-04-02 06:14:30,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:14:30,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:30,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1692383978, now seen corresponding path program 1 times [2023-04-02 06:14:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628353862] [2023-04-02 06:14:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:30,346 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 06:14:30,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628353862] [2023-04-02 06:14:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628353862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:30,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:30,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:14:30,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589503642] [2023-04-02 06:14:30,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:30,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:14:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:14:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:14:30,348 INFO L87 Difference]: Start difference. First operand 351 states and 536 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:14:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:30,880 INFO L93 Difference]: Finished difference Result 911 states and 1426 transitions. [2023-04-02 06:14:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:14:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:14:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:30,883 INFO L225 Difference]: With dead ends: 911 [2023-04-02 06:14:30,883 INFO L226 Difference]: Without dead ends: 599 [2023-04-02 06:14:30,884 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 06:14:30,885 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 130 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:30,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 416 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:14:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-04-02 06:14:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2023-04-02 06:14:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 593 states have (on average 1.5531197301854975) internal successors, (921), 593 states have internal predecessors, (921), 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 06:14:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 924 transitions. [2023-04-02 06:14:30,933 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 924 transitions. Word has length 65 [2023-04-02 06:14:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:30,934 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 924 transitions. [2023-04-02 06:14:30,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:14:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 924 transitions. [2023-04-02 06:14:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:14:30,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:30,937 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] [2023-04-02 06:14:30,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:14:30,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:30,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1157862942, now seen corresponding path program 1 times [2023-04-02 06:14:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695664116] [2023-04-02 06:14:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:31,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:31,108 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 06:14:31,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695664116] [2023-04-02 06:14:31,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695664116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:31,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:31,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:14:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773214913] [2023-04-02 06:14:31,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:31,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:14:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:14:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:14:31,110 INFO L87 Difference]: Start difference. First operand 597 states and 924 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 06:14:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:31,618 INFO L93 Difference]: Finished difference Result 1585 states and 2486 transitions. [2023-04-02 06:14:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:14:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:14:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:31,622 INFO L225 Difference]: With dead ends: 1585 [2023-04-02 06:14:31,622 INFO L226 Difference]: Without dead ends: 1027 [2023-04-02 06:14:31,623 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 06:14:31,624 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 125 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:31,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 401 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:14:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2023-04-02 06:14:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1025. [2023-04-02 06:14:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1021 states have (on average 1.5563173359451519) internal successors, (1589), 1021 states have internal predecessors, (1589), 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 06:14:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1592 transitions. [2023-04-02 06:14:31,686 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1592 transitions. Word has length 66 [2023-04-02 06:14:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:31,687 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1592 transitions. [2023-04-02 06:14:31,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 06:14:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1592 transitions. [2023-04-02 06:14:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:14:31,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:31,687 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] [2023-04-02 06:14:31,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:14:31,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:31,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1299474923, now seen corresponding path program 1 times [2023-04-02 06:14:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95369628] [2023-04-02 06:14:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:31,855 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 06:14:31,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:31,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95369628] [2023-04-02 06:14:31,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95369628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:31,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:31,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:14:31,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575776038] [2023-04-02 06:14:31,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:31,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:14:31,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:14:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:14:31,864 INFO L87 Difference]: Start difference. First operand 1025 states and 1592 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:14:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:32,397 INFO L93 Difference]: Finished difference Result 2741 states and 4282 transitions. [2023-04-02 06:14:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:14:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:14:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:32,403 INFO L225 Difference]: With dead ends: 2741 [2023-04-02 06:14:32,404 INFO L226 Difference]: Without dead ends: 1755 [2023-04-02 06:14:32,405 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 06:14:32,406 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 120 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:32,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 386 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:14:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2023-04-02 06:14:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1753. [2023-04-02 06:14:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1749 states have (on average 1.548885077186964) internal successors, (2709), 1749 states have internal predecessors, (2709), 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 06:14:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2712 transitions. [2023-04-02 06:14:32,512 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2712 transitions. Word has length 67 [2023-04-02 06:14:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:32,512 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2712 transitions. [2023-04-02 06:14:32,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:14:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2712 transitions. [2023-04-02 06:14:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:14:32,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:32,513 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] [2023-04-02 06:14:32,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:14:32,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:32,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash -977165721, now seen corresponding path program 1 times [2023-04-02 06:14:32,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:32,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969629129] [2023-04-02 06:14:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:32,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:32,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:32,748 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 06:14:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969629129] [2023-04-02 06:14:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969629129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:32,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:32,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:14:32,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851038391] [2023-04-02 06:14:32,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:32,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:14:32,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:14:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:14:32,750 INFO L87 Difference]: Start difference. First operand 1753 states and 2712 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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 06:14:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:34,044 INFO L93 Difference]: Finished difference Result 12037 states and 18750 transitions. [2023-04-02 06:14:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:14:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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 68 [2023-04-02 06:14:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:34,094 INFO L225 Difference]: With dead ends: 12037 [2023-04-02 06:14:34,094 INFO L226 Difference]: Without dead ends: 10323 [2023-04-02 06:14:34,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:14:34,104 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 1493 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:34,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1947 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:14:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10323 states. [2023-04-02 06:14:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10323 to 3465. [2023-04-02 06:14:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3461 states have (on average 1.5362611961860735) internal successors, (5317), 3461 states have internal predecessors, (5317), 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 06:14:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5320 transitions. [2023-04-02 06:14:34,608 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5320 transitions. Word has length 68 [2023-04-02 06:14:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:34,608 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 5320 transitions. [2023-04-02 06:14:34,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 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 06:14:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5320 transitions. [2023-04-02 06:14:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 06:14:34,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:34,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:14:34,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:14:34,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:34,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -245898990, now seen corresponding path program 1 times [2023-04-02 06:14:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:34,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692859815] [2023-04-02 06:14:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:35,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:35,049 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 06:14:35,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692859815] [2023-04-02 06:14:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692859815] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:35,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:14:35,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265378253] [2023-04-02 06:14:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:35,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:14:35,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:14:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:14:35,051 INFO L87 Difference]: Start difference. First operand 3465 states and 5320 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 06:14:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:38,089 INFO L93 Difference]: Finished difference Result 18035 states and 27501 transitions. [2023-04-02 06:14:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:14:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 69 [2023-04-02 06:14:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:38,157 INFO L225 Difference]: With dead ends: 18035 [2023-04-02 06:14:38,157 INFO L226 Difference]: Without dead ends: 14609 [2023-04-02 06:14:38,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:14:38,168 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 706 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:38,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 1048 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 06:14:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14609 states. [2023-04-02 06:14:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14609 to 14601. [2023-04-02 06:14:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.5173665821744193) internal successors, (22149), 14597 states have internal predecessors, (22149), 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 06:14:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 22152 transitions. [2023-04-02 06:14:40,062 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 22152 transitions. Word has length 69 [2023-04-02 06:14:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:40,062 INFO L495 AbstractCegarLoop]: Abstraction has 14601 states and 22152 transitions. [2023-04-02 06:14:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 06:14:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 22152 transitions. [2023-04-02 06:14:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:14:40,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:40,066 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] [2023-04-02 06:14:40,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:14:40,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:40,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2113311337, now seen corresponding path program 1 times [2023-04-02 06:14:40,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:40,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619242513] [2023-04-02 06:14:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:40,304 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 06:14:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619242513] [2023-04-02 06:14:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619242513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:40,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:14:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013508977] [2023-04-02 06:14:40,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:14:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:14:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:14:40,306 INFO L87 Difference]: Start difference. First operand 14601 states and 22152 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 06:14:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:44,302 INFO L93 Difference]: Finished difference Result 43725 states and 66378 transitions. [2023-04-02 06:14:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:14:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 71 [2023-04-02 06:14:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:44,362 INFO L225 Difference]: With dead ends: 43725 [2023-04-02 06:14:44,362 INFO L226 Difference]: Without dead ends: 29163 [2023-04-02 06:14:44,383 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 06:14:44,384 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 779 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:44,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 218 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:14:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29163 states. [2023-04-02 06:14:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29163 to 29161. [2023-04-02 06:14:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29161 states, 29157 states have (on average 1.5092430634153033) internal successors, (44005), 29157 states have internal predecessors, (44005), 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 06:14:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29161 states to 29161 states and 44008 transitions. [2023-04-02 06:14:47,864 INFO L78 Accepts]: Start accepts. Automaton has 29161 states and 44008 transitions. Word has length 71 [2023-04-02 06:14:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:47,865 INFO L495 AbstractCegarLoop]: Abstraction has 29161 states and 44008 transitions. [2023-04-02 06:14:47,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 06:14:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 29161 states and 44008 transitions. [2023-04-02 06:14:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:14:47,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:47,866 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] [2023-04-02 06:14:47,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:14:47,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:47,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -411684252, now seen corresponding path program 1 times [2023-04-02 06:14:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366676414] [2023-04-02 06:14:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:14:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:14:48,158 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 06:14:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:14:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366676414] [2023-04-02 06:14:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366676414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:14:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:14:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:14:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118028122] [2023-04-02 06:14:48,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:14:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:14:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:14:48,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:14:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:14:48,162 INFO L87 Difference]: Start difference. First operand 29161 states and 44008 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 06:14:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:14:55,390 INFO L93 Difference]: Finished difference Result 59563 states and 89257 transitions. [2023-04-02 06:14:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:14:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 71 [2023-04-02 06:14:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:14:55,520 INFO L225 Difference]: With dead ends: 59563 [2023-04-02 06:14:55,520 INFO L226 Difference]: Without dead ends: 59561 [2023-04-02 06:14:55,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:14:55,543 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 284 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:14:55,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 904 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:14:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59561 states. [2023-04-02 06:14:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59561 to 30441. [2023-04-02 06:14:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30441 states, 30437 states have (on average 1.4878273154384467) internal successors, (45285), 30437 states have internal predecessors, (45285), 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 06:14:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30441 states to 30441 states and 45288 transitions. [2023-04-02 06:14:59,893 INFO L78 Accepts]: Start accepts. Automaton has 30441 states and 45288 transitions. Word has length 71 [2023-04-02 06:14:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:14:59,893 INFO L495 AbstractCegarLoop]: Abstraction has 30441 states and 45288 transitions. [2023-04-02 06:14:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 06:14:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 30441 states and 45288 transitions. [2023-04-02 06:14:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:14:59,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:14:59,894 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] [2023-04-02 06:14:59,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:14:59,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:14:59,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:14:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 132309860, now seen corresponding path program 1 times [2023-04-02 06:14:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:14:59,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69336570] [2023-04-02 06:14:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:14:59,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:14:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:15:00,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:15:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:15:00,071 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 06:15:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:15:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69336570] [2023-04-02 06:15:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69336570] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:15:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:15:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:15:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305658109] [2023-04-02 06:15:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:15:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:15:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:15:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:15:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:15:00,073 INFO L87 Difference]: Start difference. First operand 30441 states and 45288 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 06:15:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:15:06,160 INFO L93 Difference]: Finished difference Result 74191 states and 110324 transitions. [2023-04-02 06:15:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:15:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 72 [2023-04-02 06:15:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:15:06,233 INFO L225 Difference]: With dead ends: 74191 [2023-04-02 06:15:06,233 INFO L226 Difference]: Without dead ends: 43789 [2023-04-02 06:15:06,280 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 06:15:06,281 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 110 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:15:06,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 375 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:15:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43789 states. [2023-04-02 06:15:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43789 to 43787. [2023-04-02 06:15:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43787 states, 43783 states have (on average 1.4796382157458374) internal successors, (64783), 43783 states have internal predecessors, (64783), 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 06:15:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43787 states to 43787 states and 64786 transitions. [2023-04-02 06:15:12,128 INFO L78 Accepts]: Start accepts. Automaton has 43787 states and 64786 transitions. Word has length 72 [2023-04-02 06:15:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:15:12,128 INFO L495 AbstractCegarLoop]: Abstraction has 43787 states and 64786 transitions. [2023-04-02 06:15:12,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 06:15:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 43787 states and 64786 transitions. [2023-04-02 06:15:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 06:15:12,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:15:12,141 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:15:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:15:12,142 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:15:12,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:15:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1759455917, now seen corresponding path program 1 times [2023-04-02 06:15:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:15:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618663373] [2023-04-02 06:15:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:15:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:15:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:15:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:15:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:15:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:15:12,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:15:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618663373] [2023-04-02 06:15:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618663373] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:15:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503651199] [2023-04-02 06:15:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:15:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:15:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:15:12,501 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 06:15:12,504 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 06:15:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:15:12,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 06:15:12,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:15:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:15:12,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:15:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:15:13,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503651199] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:15:13,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:15:13,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 18 [2023-04-02 06:15:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628762572] [2023-04-02 06:15:13,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:15:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 06:15:13,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:15:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 06:15:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-04-02 06:15:13,156 INFO L87 Difference]: Start difference. First operand 43787 states and 64786 transitions. Second operand has 18 states, 18 states have (on average 14.944444444444445) internal successors, (269), 17 states have internal predecessors, (269), 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) [2023-04-02 06:16:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:16:53,835 INFO L93 Difference]: Finished difference Result 617232 states and 904847 transitions. [2023-04-02 06:16:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-04-02 06:16:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.944444444444445) internal successors, (269), 17 states have internal predecessors, (269), 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) Word has length 97 [2023-04-02 06:16:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:16:55,386 INFO L225 Difference]: With dead ends: 617232 [2023-04-02 06:16:55,387 INFO L226 Difference]: Without dead ends: 576158 [2023-04-02 06:16:55,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14180 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4866, Invalid=26640, Unknown=0, NotChecked=0, Total=31506 [2023-04-02 06:16:55,605 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 17494 mSDsluCounter, 4759 mSDsCounter, 0 mSdLazyCounter, 6289 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17494 SdHoareTripleChecker+Valid, 5488 SdHoareTripleChecker+Invalid, 6388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:16:55,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17494 Valid, 5488 Invalid, 6388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [99 Valid, 6289 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 06:16:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576158 states. [2023-04-02 06:17:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576158 to 207099. [2023-04-02 06:17:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207099 states, 207095 states have (on average 1.4631304473792222) internal successors, (303007), 207095 states have internal predecessors, (303007), 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 06:17:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207099 states to 207099 states and 303010 transitions. [2023-04-02 06:17:34,788 INFO L78 Accepts]: Start accepts. Automaton has 207099 states and 303010 transitions. Word has length 97 [2023-04-02 06:17:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:34,788 INFO L495 AbstractCegarLoop]: Abstraction has 207099 states and 303010 transitions. [2023-04-02 06:17:34,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.944444444444445) internal successors, (269), 17 states have internal predecessors, (269), 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) [2023-04-02 06:17:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 207099 states and 303010 transitions. [2023-04-02 06:17:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:17:34,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:34,807 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:17:34,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 06:17:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 06:17:35,013 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:35,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1976909067, now seen corresponding path program 1 times [2023-04-02 06:17:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278469017] [2023-04-02 06:17:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:35,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278469017] [2023-04-02 06:17:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278469017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265274737] [2023-04-02 06:17:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:35,196 INFO L87 Difference]: Start difference. First operand 207099 states and 303010 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 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)