/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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:50:48,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:50:48,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:50:48,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:50:48,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:50:48,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:50:48,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:50:48,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:50:48,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:50:48,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:50:48,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:50:48,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:50:48,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:50:48,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:50:48,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:50:48,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:50:48,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:50:48,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:50:48,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:50:48,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:50:48,762 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 06:50:48,785 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:50:48,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:50:48,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:50:48,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:50:48,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:50:48,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:50:48,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:50:48,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:50:48,788 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:50:48,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:50:48,788 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:50:48,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:50:48,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:50:48,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:50:48,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:50:48,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:50:48,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:50:48,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:50:48,791 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:50:48,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:50:48,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:50:49,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:50:49,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:50:49,015 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:50:49,015 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:50:49,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:50:50,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:50:50,357 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:50:50,358 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:50:50,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef29013e/db6f9ae31b874a2887831b967c6e873b/FLAG3c02295cd [2023-04-02 06:50:50,379 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef29013e/db6f9ae31b874a2887831b967c6e873b [2023-04-02 06:50:50,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:50:50,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:50:50,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:50:50,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:50:50,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:50:50,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710d2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50, skipping insertion in model container [2023-04-02 06:50:50,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:50:50,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:50:50,564 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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:50:50,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:50:50,596 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:50:50,633 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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:50:50,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:50:50,661 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:50:50,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50 WrapperNode [2023-04-02 06:50:50,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:50:50,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:50:50,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:50:50,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:50:50,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,722 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:50:50,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:50:50,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:50:50,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:50:50,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (1/1) ... [2023-04-02 06:50:50,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:50:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:50:50,769 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 06:50:50,778 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 06:50:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:50:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:50:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:50:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:50:50,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:50:50,795 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:50:50,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:50:50,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:50:50,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:50:50,884 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:50:50,886 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:50:51,240 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:50:51,258 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:50:51,258 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:50:51,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:50:51 BoogieIcfgContainer [2023-04-02 06:50:51,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:50:51,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:50:51,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:50:51,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:50:51,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:50:50" (1/3) ... [2023-04-02 06:50:51,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c32e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:50:51, skipping insertion in model container [2023-04-02 06:50:51,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:50" (2/3) ... [2023-04-02 06:50:51,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c32e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:50:51, skipping insertion in model container [2023-04-02 06:50:51,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:50:51" (3/3) ... [2023-04-02 06:50:51,270 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:50:51,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:50:51,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:50:51,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:50:51,366 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;@c07262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:50:51,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:50:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 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 06:50:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:50:51,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:51,388 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 06:50:51,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:51,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -32538977, now seen corresponding path program 1 times [2023-04-02 06:50:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:51,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101115001] [2023-04-02 06:50:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:51,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:52,026 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 06:50:52,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:52,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101115001] [2023-04-02 06:50:52,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101115001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:52,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:52,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173262082] [2023-04-02 06:50:52,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:52,074 INFO L87 Difference]: Start difference. First operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 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 15.75) 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 06:50:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:52,835 INFO L93 Difference]: Finished difference Result 364 states and 578 transitions. [2023-04-02 06:50:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:52,837 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 06:50:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:52,844 INFO L225 Difference]: With dead ends: 364 [2023-04-02 06:50:52,844 INFO L226 Difference]: Without dead ends: 240 [2023-04-02 06:50:52,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:52,848 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 161 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:52,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 470 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-02 06:50:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2023-04-02 06:50:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.51931330472103) internal successors, (354), 233 states have internal predecessors, (354), 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 06:50:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 357 transitions. [2023-04-02 06:50:52,913 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 357 transitions. Word has length 66 [2023-04-02 06:50:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:52,914 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 357 transitions. [2023-04-02 06:50:52,914 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 06:50:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 357 transitions. [2023-04-02 06:50:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:50:52,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:52,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:50:52,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:52,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1854086336, now seen corresponding path program 1 times [2023-04-02 06:50:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:52,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858746372] [2023-04-02 06:50:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:53,213 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 06:50:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858746372] [2023-04-02 06:50:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858746372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:53,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916597157] [2023-04-02 06:50:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:53,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:53,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:53,216 INFO L87 Difference]: Start difference. First operand 237 states and 357 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 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 06:50:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:53,699 INFO L93 Difference]: Finished difference Result 573 states and 885 transitions. [2023-04-02 06:50:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 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 06:50:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:53,702 INFO L225 Difference]: With dead ends: 573 [2023-04-02 06:50:53,702 INFO L226 Difference]: Without dead ends: 397 [2023-04-02 06:50:53,703 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 06:50:53,704 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 128 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:53,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 418 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-04-02 06:50:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2023-04-02 06:50:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.5347043701799485) internal successors, (597), 389 states have internal predecessors, (597), 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 06:50:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 600 transitions. [2023-04-02 06:50:53,735 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 600 transitions. Word has length 68 [2023-04-02 06:50:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:53,735 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 600 transitions. [2023-04-02 06:50:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 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 06:50:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 600 transitions. [2023-04-02 06:50:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:50:53,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:53,737 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] [2023-04-02 06:50:53,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:50:53,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:53,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash -314471455, now seen corresponding path program 1 times [2023-04-02 06:50:53,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:53,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864756291] [2023-04-02 06:50:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:53,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:53,964 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 06:50:53,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864756291] [2023-04-02 06:50:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864756291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:53,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:53,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:53,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101231671] [2023-04-02 06:50:53,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:53,966 INFO L87 Difference]: Start difference. First operand 393 states and 600 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 06:50:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:54,440 INFO L93 Difference]: Finished difference Result 1025 states and 1586 transitions. [2023-04-02 06:50:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-04-02 06:50:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:54,442 INFO L225 Difference]: With dead ends: 1025 [2023-04-02 06:50:54,443 INFO L226 Difference]: Without dead ends: 693 [2023-04-02 06:50:54,444 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 06:50:54,445 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 122 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:54,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 419 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-04-02 06:50:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2023-04-02 06:50:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 683 states have (on average 1.5358711566617862) internal successors, (1049), 683 states have internal predecessors, (1049), 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 06:50:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1052 transitions. [2023-04-02 06:50:54,484 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1052 transitions. Word has length 70 [2023-04-02 06:50:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:54,484 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1052 transitions. [2023-04-02 06:50:54,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 06:50:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1052 transitions. [2023-04-02 06:50:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:50:54,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:54,487 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 06:50:54,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:50:54,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:54,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:54,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1947624002, now seen corresponding path program 1 times [2023-04-02 06:50:54,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:54,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187229705] [2023-04-02 06:50:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:54,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:54,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:54,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187229705] [2023-04-02 06:50:54,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187229705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:54,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:54,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:50:54,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564824258] [2023-04-02 06:50:54,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:54,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:50:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:50:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:54,737 INFO L87 Difference]: Start difference. First operand 687 states and 1052 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 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 06:50:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:55,399 INFO L93 Difference]: Finished difference Result 2961 states and 4630 transitions. [2023-04-02 06:50:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:50:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 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 06:50:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:55,408 INFO L225 Difference]: With dead ends: 2961 [2023-04-02 06:50:55,408 INFO L226 Difference]: Without dead ends: 2325 [2023-04-02 06:50:55,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:50:55,417 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 975 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:55,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1388 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2023-04-02 06:50:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1215. [2023-04-02 06:50:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1211 states have (on average 1.5549132947976878) internal successors, (1883), 1211 states have internal predecessors, (1883), 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 06:50:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1886 transitions. [2023-04-02 06:50:55,517 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1886 transitions. Word has length 72 [2023-04-02 06:50:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1886 transitions. [2023-04-02 06:50:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 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 06:50:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1886 transitions. [2023-04-02 06:50:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:50:55,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:55,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:55,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:50:55,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:55,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 185191483, now seen corresponding path program 1 times [2023-04-02 06:50:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238032829] [2023-04-02 06:50:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:55,756 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 06:50:55,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:55,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238032829] [2023-04-02 06:50:55,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238032829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:55,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:55,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:50:55,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395973873] [2023-04-02 06:50:55,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:55,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:50:55,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:50:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:55,764 INFO L87 Difference]: Start difference. First operand 1215 states and 1886 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 06:50:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:56,324 INFO L93 Difference]: Finished difference Result 3539 states and 5547 transitions. [2023-04-02 06:50:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:50:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-02 06:50:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:56,334 INFO L225 Difference]: With dead ends: 3539 [2023-04-02 06:50:56,334 INFO L226 Difference]: Without dead ends: 2385 [2023-04-02 06:50:56,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:50:56,341 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 434 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:56,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 777 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2023-04-02 06:50:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1788. [2023-04-02 06:50:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1784 states have (on average 1.5571748878923768) internal successors, (2778), 1784 states have internal predecessors, (2778), 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 06:50:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2781 transitions. [2023-04-02 06:50:56,445 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2781 transitions. Word has length 73 [2023-04-02 06:50:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:56,446 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2781 transitions. [2023-04-02 06:50:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 06:50:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2781 transitions. [2023-04-02 06:50:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:50:56,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:56,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:56,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:50:56,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:56,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2073097267, now seen corresponding path program 1 times [2023-04-02 06:50:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149960842] [2023-04-02 06:50:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:56,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149960842] [2023-04-02 06:50:56,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149960842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:56,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:56,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489442379] [2023-04-02 06:50:56,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:56,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:56,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:56,660 INFO L87 Difference]: Start difference. First operand 1788 states and 2781 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:50:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:57,283 INFO L93 Difference]: Finished difference Result 3628 states and 5652 transitions. [2023-04-02 06:50:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 76 [2023-04-02 06:50:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:57,292 INFO L225 Difference]: With dead ends: 3628 [2023-04-02 06:50:57,292 INFO L226 Difference]: Without dead ends: 2636 [2023-04-02 06:50:57,294 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 06:50:57,294 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 121 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:57,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 445 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2023-04-02 06:50:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2634. [2023-04-02 06:50:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2630 states have (on average 1.5456273764258555) internal successors, (4065), 2630 states have internal predecessors, (4065), 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 06:50:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 4068 transitions. [2023-04-02 06:50:57,454 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 4068 transitions. Word has length 76 [2023-04-02 06:50:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 2634 states and 4068 transitions. [2023-04-02 06:50:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:50:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 4068 transitions. [2023-04-02 06:50:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:50:57,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:57,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:57,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:50:57,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:57,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash -137335905, now seen corresponding path program 1 times [2023-04-02 06:50:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321343311] [2023-04-02 06:50:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:57,641 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 06:50:57,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321343311] [2023-04-02 06:50:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321343311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22182366] [2023-04-02 06:50:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:57,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:57,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:57,643 INFO L87 Difference]: Start difference. First operand 2634 states and 4068 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:50:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:58,348 INFO L93 Difference]: Finished difference Result 4912 states and 7610 transitions. [2023-04-02 06:50:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 76 [2023-04-02 06:50:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:58,359 INFO L225 Difference]: With dead ends: 4912 [2023-04-02 06:50:58,359 INFO L226 Difference]: Without dead ends: 3503 [2023-04-02 06:50:58,362 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 06:50:58,363 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 127 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 485 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 06:50:58,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 485 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2023-04-02 06:50:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3501. [2023-04-02 06:50:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3497 states have (on average 1.537031741492708) internal successors, (5375), 3497 states have internal predecessors, (5375), 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 06:50:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 5378 transitions. [2023-04-02 06:50:58,586 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 5378 transitions. Word has length 76 [2023-04-02 06:50:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:58,586 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 5378 transitions. [2023-04-02 06:50:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:50:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 5378 transitions. [2023-04-02 06:50:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:50:58,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:58,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:58,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:50:58,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:58,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash -259347632, now seen corresponding path program 1 times [2023-04-02 06:50:58,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:58,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708521116] [2023-04-02 06:50:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708521116] [2023-04-02 06:50:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708521116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:58,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676588591] [2023-04-02 06:50:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:58,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:58,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:58,783 INFO L87 Difference]: Start difference. First operand 3501 states and 5378 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:50:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:59,700 INFO L93 Difference]: Finished difference Result 7470 states and 11484 transitions. [2023-04-02 06:50:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 76 [2023-04-02 06:50:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:59,716 INFO L225 Difference]: With dead ends: 7470 [2023-04-02 06:50:59,716 INFO L226 Difference]: Without dead ends: 5008 [2023-04-02 06:50:59,720 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 06:50:59,721 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 133 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:59,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 520 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2023-04-02 06:51:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5006. [2023-04-02 06:51:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 5002 states have (on average 1.5217912834866054) internal successors, (7612), 5002 states have internal predecessors, (7612), 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 06:51:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 7615 transitions. [2023-04-02 06:51:00,058 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 7615 transitions. Word has length 76 [2023-04-02 06:51:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:00,058 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 7615 transitions. [2023-04-02 06:51:00,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 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 06:51:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 7615 transitions. [2023-04-02 06:51:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:51:00,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:00,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:51:00,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:00,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1794680655, now seen corresponding path program 1 times [2023-04-02 06:51:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:00,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305644232] [2023-04-02 06:51:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:00,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:00,428 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 06:51:00,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:00,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305644232] [2023-04-02 06:51:00,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305644232] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:00,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325339175] [2023-04-02 06:51:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:00,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:00,430 INFO L87 Difference]: Start difference. First operand 5006 states and 7615 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:01,380 INFO L93 Difference]: Finished difference Result 8327 states and 12584 transitions. [2023-04-02 06:51:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:51:01,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-02 06:51:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:01,422 INFO L225 Difference]: With dead ends: 8327 [2023-04-02 06:51:01,422 INFO L226 Difference]: Without dead ends: 8325 [2023-04-02 06:51:01,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:51:01,428 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 278 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:01,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1082 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8325 states. [2023-04-02 06:51:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 5110. [2023-04-02 06:51:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5110 states, 5106 states have (on average 1.5058754406580495) internal successors, (7689), 5106 states have internal predecessors, (7689), 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 06:51:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5110 states to 5110 states and 7692 transitions. [2023-04-02 06:51:01,966 INFO L78 Accepts]: Start accepts. Automaton has 5110 states and 7692 transitions. Word has length 81 [2023-04-02 06:51:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:01,966 INFO L495 AbstractCegarLoop]: Abstraction has 5110 states and 7692 transitions. [2023-04-02 06:51:01,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5110 states and 7692 transitions. [2023-04-02 06:51:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:01,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:01,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:51:01,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:01,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -646569457, now seen corresponding path program 1 times [2023-04-02 06:51:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:01,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787835620] [2023-04-02 06:51:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:51:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787835620] [2023-04-02 06:51:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787835620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:02,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:02,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106094988] [2023-04-02 06:51:02,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:02,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:02,257 INFO L87 Difference]: Start difference. First operand 5110 states and 7692 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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 06:51:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:03,691 INFO L93 Difference]: Finished difference Result 14739 states and 22216 transitions. [2023-04-02 06:51:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:51:03,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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 107 [2023-04-02 06:51:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:03,712 INFO L225 Difference]: With dead ends: 14739 [2023-04-02 06:51:03,712 INFO L226 Difference]: Without dead ends: 11335 [2023-04-02 06:51:03,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:51:03,720 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 556 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:03,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 983 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2023-04-02 06:51:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 8212. [2023-04-02 06:51:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8208 states have (on average 1.5031676413255362) internal successors, (12338), 8208 states have internal predecessors, (12338), 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 06:51:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 12341 transitions. [2023-04-02 06:51:04,364 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 12341 transitions. Word has length 107 [2023-04-02 06:51:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:04,364 INFO L495 AbstractCegarLoop]: Abstraction has 8212 states and 12341 transitions. [2023-04-02 06:51:04,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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 06:51:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 12341 transitions. [2023-04-02 06:51:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:04,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:04,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:04,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:51:04,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:04,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1289191905, now seen corresponding path program 1 times [2023-04-02 06:51:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:04,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859567781] [2023-04-02 06:51:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:51:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859567781] [2023-04-02 06:51:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859567781] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:04,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:04,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802535727] [2023-04-02 06:51:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:04,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:04,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:04,731 INFO L87 Difference]: Start difference. First operand 8212 states and 12341 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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 06:51:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:06,442 INFO L93 Difference]: Finished difference Result 16688 states and 25146 transitions. [2023-04-02 06:51:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:51:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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 107 [2023-04-02 06:51:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:06,473 INFO L225 Difference]: With dead ends: 16688 [2023-04-02 06:51:06,474 INFO L226 Difference]: Without dead ends: 13284 [2023-04-02 06:51:06,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:51:06,485 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 552 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:06,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1055 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13284 states. [2023-04-02 06:51:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13284 to 12312. [2023-04-02 06:51:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12312 states, 12308 states have (on average 1.501462463438414) internal successors, (18480), 12308 states have internal predecessors, (18480), 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 06:51:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12312 states to 12312 states and 18483 transitions. [2023-04-02 06:51:07,576 INFO L78 Accepts]: Start accepts. Automaton has 12312 states and 18483 transitions. Word has length 107 [2023-04-02 06:51:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:07,576 INFO L495 AbstractCegarLoop]: Abstraction has 12312 states and 18483 transitions. [2023-04-02 06:51:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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 06:51:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12312 states and 18483 transitions. [2023-04-02 06:51:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:07,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:07,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:07,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:51:07,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:07,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1167180178, now seen corresponding path program 1 times [2023-04-02 06:51:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113821838] [2023-04-02 06:51:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:51:07,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113821838] [2023-04-02 06:51:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113821838] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:07,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889239158] [2023-04-02 06:51:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:07,790 INFO L87 Difference]: Start difference. First operand 12312 states and 18483 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 06:51:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:10,026 INFO L93 Difference]: Finished difference Result 24979 states and 37629 transitions. [2023-04-02 06:51:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 107 [2023-04-02 06:51:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:10,064 INFO L225 Difference]: With dead ends: 24979 [2023-04-02 06:51:10,064 INFO L226 Difference]: Without dead ends: 22853 [2023-04-02 06:51:10,072 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 06:51:10,072 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 112 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:10,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 420 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:51:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2023-04-02 06:51:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 22851. [2023-04-02 06:51:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22851 states, 22847 states have (on average 1.5029982054536701) internal successors, (34339), 22847 states have internal predecessors, (34339), 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 06:51:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 34342 transitions. [2023-04-02 06:51:11,833 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 34342 transitions. Word has length 107 [2023-04-02 06:51:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:11,833 INFO L495 AbstractCegarLoop]: Abstraction has 22851 states and 34342 transitions. [2023-04-02 06:51:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 06:51:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 34342 transitions. [2023-04-02 06:51:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:51:11,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:11,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:11,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:51:11,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:11,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1246531276, now seen corresponding path program 1 times [2023-04-02 06:51:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492598327] [2023-04-02 06:51:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:12,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:12,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492598327] [2023-04-02 06:51:12,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492598327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:12,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:12,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:12,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859598349] [2023-04-02 06:51:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:12,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:12,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:12,047 INFO L87 Difference]: Start difference. First operand 22851 states and 34342 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 06:51:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:16,059 INFO L93 Difference]: Finished difference Result 67053 states and 100574 transitions. [2023-04-02 06:51:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-02 06:51:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:16,253 INFO L225 Difference]: With dead ends: 67053 [2023-04-02 06:51:16,254 INFO L226 Difference]: Without dead ends: 44283 [2023-04-02 06:51:16,300 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 06:51:16,317 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 154 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:16,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 511 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44283 states. [2023-04-02 06:51:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44283 to 44281. [2023-04-02 06:51:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44281 states, 44277 states have (on average 1.4885832373467036) internal successors, (65910), 44277 states have internal predecessors, (65910), 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 06:51:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44281 states to 44281 states and 65913 transitions. [2023-04-02 06:51:20,230 INFO L78 Accepts]: Start accepts. Automaton has 44281 states and 65913 transitions. Word has length 108 [2023-04-02 06:51:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:20,231 INFO L495 AbstractCegarLoop]: Abstraction has 44281 states and 65913 transitions. [2023-04-02 06:51:20,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 06:51:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 44281 states and 65913 transitions. [2023-04-02 06:51:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:51:20,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:20,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:51:20,234 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:20,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1165294998, now seen corresponding path program 1 times [2023-04-02 06:51:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:20,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219370478] [2023-04-02 06:51:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:51:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219370478] [2023-04-02 06:51:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219370478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:51:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823132090] [2023-04-02 06:51:20,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:20,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:51:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:51:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:51:20,448 INFO L87 Difference]: Start difference. First operand 44281 states and 65913 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 06:51:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:25,104 INFO L93 Difference]: Finished difference Result 70549 states and 105366 transitions. [2023-04-02 06:51:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:51:25,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 108 [2023-04-02 06:51:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:25,192 INFO L225 Difference]: With dead ends: 70549 [2023-04-02 06:51:25,192 INFO L226 Difference]: Without dead ends: 47409 [2023-04-02 06:51:25,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:25,231 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 244 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:25,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 800 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47409 states. [2023-04-02 06:51:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47409 to 29527. [2023-04-02 06:51:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29527 states, 29523 states have (on average 1.4841310164956136) internal successors, (43816), 29523 states have internal predecessors, (43816), 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 06:51:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29527 states to 29527 states and 43819 transitions. [2023-04-02 06:51:27,966 INFO L78 Accepts]: Start accepts. Automaton has 29527 states and 43819 transitions. Word has length 108 [2023-04-02 06:51:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:27,967 INFO L495 AbstractCegarLoop]: Abstraction has 29527 states and 43819 transitions. [2023-04-02 06:51:27,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 06:51:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29527 states and 43819 transitions. [2023-04-02 06:51:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:51:27,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:27,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:27,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:51:27,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:27,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1572950850, now seen corresponding path program 1 times [2023-04-02 06:51:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739328575] [2023-04-02 06:51:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739328575] [2023-04-02 06:51:28,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739328575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:28,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:28,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894955463] [2023-04-02 06:51:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:28,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:28,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:28,150 INFO L87 Difference]: Start difference. First operand 29527 states and 43819 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 06:51:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:34,535 INFO L93 Difference]: Finished difference Result 86558 states and 128174 transitions. [2023-04-02 06:51:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-02 06:51:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:34,666 INFO L225 Difference]: With dead ends: 86558 [2023-04-02 06:51:34,666 INFO L226 Difference]: Without dead ends: 57191 [2023-04-02 06:51:34,704 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 06:51:34,705 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 173 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:34,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 549 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57191 states. [2023-04-02 06:51:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57191 to 57189. [2023-04-02 06:51:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57189 states, 57185 states have (on average 1.4689516481594824) internal successors, (84002), 57185 states have internal predecessors, (84002), 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 06:51:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57189 states to 57189 states and 84005 transitions. [2023-04-02 06:51:40,286 INFO L78 Accepts]: Start accepts. Automaton has 57189 states and 84005 transitions. Word has length 108 [2023-04-02 06:51:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:40,287 INFO L495 AbstractCegarLoop]: Abstraction has 57189 states and 84005 transitions. [2023-04-02 06:51:40,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 06:51:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 57189 states and 84005 transitions. [2023-04-02 06:51:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:51:40,295 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:40,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:51:40,295 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:40,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2004660593, now seen corresponding path program 1 times [2023-04-02 06:51:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:40,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18085437] [2023-04-02 06:51:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 06:51:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18085437] [2023-04-02 06:51:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18085437] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:40,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:40,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549765555] [2023-04-02 06:51:40,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:40,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:40,558 INFO L87 Difference]: Start difference. First operand 57189 states and 84005 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 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 06:51:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:49,173 INFO L93 Difference]: Finished difference Result 136967 states and 202069 transitions. [2023-04-02 06:51:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:51:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 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 109 [2023-04-02 06:51:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:49,339 INFO L225 Difference]: With dead ends: 136967 [2023-04-02 06:51:49,340 INFO L226 Difference]: Without dead ends: 80057 [2023-04-02 06:51:49,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:49,406 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 132 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:49,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 438 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:51:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80057 states. [2023-04-02 06:51:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80057 to 77143. [2023-04-02 06:51:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77143 states, 77139 states have (on average 1.4578358547557007) internal successors, (112456), 77139 states have internal predecessors, (112456), 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 06:51:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77143 states to 77143 states and 112459 transitions. [2023-04-02 06:51:58,055 INFO L78 Accepts]: Start accepts. Automaton has 77143 states and 112459 transitions. Word has length 109 [2023-04-02 06:51:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:58,057 INFO L495 AbstractCegarLoop]: Abstraction has 77143 states and 112459 transitions. [2023-04-02 06:51:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 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 06:51:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 77143 states and 112459 transitions. [2023-04-02 06:51:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:51:58,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:58,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:51:58,088 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:58,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1076860783, now seen corresponding path program 1 times [2023-04-02 06:51:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:58,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651166089] [2023-04-02 06:51:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:51:58,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651166089] [2023-04-02 06:51:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651166089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:58,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:58,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:58,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398152765] [2023-04-02 06:51:58,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:58,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:58,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:58,302 INFO L87 Difference]: Start difference. First operand 77143 states and 112459 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 06:52:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:10,216 INFO L93 Difference]: Finished difference Result 184935 states and 270813 transitions. [2023-04-02 06:52:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:52:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 109 [2023-04-02 06:52:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:10,443 INFO L225 Difference]: With dead ends: 184935 [2023-04-02 06:52:10,443 INFO L226 Difference]: Without dead ends: 108095 [2023-04-02 06:52:10,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:10,522 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 126 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:10,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 446 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:52:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108095 states. [2023-04-02 06:52:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108095 to 104033. [2023-04-02 06:52:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104033 states, 104029 states have (on average 1.4460583106633726) internal successors, (150432), 104029 states have internal predecessors, (150432), 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 06:52:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104033 states to 104033 states and 150435 transitions. [2023-04-02 06:52:21,876 INFO L78 Accepts]: Start accepts. Automaton has 104033 states and 150435 transitions. Word has length 109 [2023-04-02 06:52:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:21,876 INFO L495 AbstractCegarLoop]: Abstraction has 104033 states and 150435 transitions. [2023-04-02 06:52:21,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 06:52:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 104033 states and 150435 transitions. [2023-04-02 06:52:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 06:52:21,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:21,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:21,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:52:21,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:21,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash -766950420, now seen corresponding path program 1 times [2023-04-02 06:52:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:21,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909828365] [2023-04-02 06:52:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:21,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:22,305 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 06:52:22,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:22,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909828365] [2023-04-02 06:52:22,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909828365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:22,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:22,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098802717] [2023-04-02 06:52:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:22,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:22,306 INFO L87 Difference]: Start difference. First operand 104033 states and 150435 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 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 06:52:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:33,423 INFO L93 Difference]: Finished difference Result 195939 states and 283697 transitions. [2023-04-02 06:52:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:52:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-02 06:52:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:33,751 INFO L225 Difference]: With dead ends: 195939 [2023-04-02 06:52:33,752 INFO L226 Difference]: Without dead ends: 92209 [2023-04-02 06:52:33,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:33,858 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 99 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:33,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 479 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:52:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92209 states. [2023-04-02 06:52:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92209 to 92207. [2023-04-02 06:52:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92207 states, 92203 states have (on average 1.4395193214971314) internal successors, (132728), 92203 states have internal predecessors, (132728), 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 06:52:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92207 states to 92207 states and 132731 transitions. [2023-04-02 06:52:44,312 INFO L78 Accepts]: Start accepts. Automaton has 92207 states and 132731 transitions. Word has length 111 [2023-04-02 06:52:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:44,312 INFO L495 AbstractCegarLoop]: Abstraction has 92207 states and 132731 transitions. [2023-04-02 06:52:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 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 06:52:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92207 states and 132731 transitions. [2023-04-02 06:52:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 06:52:44,315 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:44,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:44,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:52:44,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:44,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1886207209, now seen corresponding path program 1 times [2023-04-02 06:52:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040009107] [2023-04-02 06:52:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:44,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:52:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040009107] [2023-04-02 06:52:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040009107] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:44,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877672812] [2023-04-02 06:52:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:44,509 INFO L87 Difference]: Start difference. First operand 92207 states and 132731 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 06:52:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:55,597 INFO L93 Difference]: Finished difference Result 136936 states and 196397 transitions. [2023-04-02 06:52:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:52:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 112 [2023-04-02 06:52:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:55,780 INFO L225 Difference]: With dead ends: 136936 [2023-04-02 06:52:55,780 INFO L226 Difference]: Without dead ends: 92321 [2023-04-02 06:52:55,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:55,842 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 147 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:55,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 613 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92321 states. [2023-04-02 06:53:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92321 to 92319. [2023-04-02 06:53:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92319 states, 92315 states have (on average 1.4271786816876997) internal successors, (131750), 92315 states have internal predecessors, (131750), 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 06:53:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92319 states to 92319 states and 131753 transitions. [2023-04-02 06:53:06,665 INFO L78 Accepts]: Start accepts. Automaton has 92319 states and 131753 transitions. Word has length 112 [2023-04-02 06:53:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:06,666 INFO L495 AbstractCegarLoop]: Abstraction has 92319 states and 131753 transitions. [2023-04-02 06:53:06,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 06:53:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 92319 states and 131753 transitions. [2023-04-02 06:53:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 06:53:06,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:06,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:53:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:53:06,669 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:06,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash 896839304, now seen corresponding path program 1 times [2023-04-02 06:53:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650659789] [2023-04-02 06:53:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:53:06,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650659789] [2023-04-02 06:53:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650659789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:06,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:06,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767552850] [2023-04-02 06:53:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:06,858 INFO L87 Difference]: Start difference. First operand 92319 states and 131753 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 06:53:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:17,306 INFO L93 Difference]: Finished difference Result 123180 states and 175246 transitions. [2023-04-02 06:53:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:53:17,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 112 [2023-04-02 06:53:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:17,449 INFO L225 Difference]: With dead ends: 123180 [2023-04-02 06:53:17,449 INFO L226 Difference]: Without dead ends: 78592 [2023-04-02 06:53:17,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:17,497 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 161 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:17,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 628 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:53:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78592 states. [2023-04-02 06:53:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78592 to 78590. [2023-04-02 06:53:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78590 states, 78586 states have (on average 1.4148957829638866) internal successors, (111191), 78586 states have internal predecessors, (111191), 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 06:53:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78590 states to 78590 states and 111194 transitions. [2023-04-02 06:53:27,381 INFO L78 Accepts]: Start accepts. Automaton has 78590 states and 111194 transitions. Word has length 112 [2023-04-02 06:53:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:27,381 INFO L495 AbstractCegarLoop]: Abstraction has 78590 states and 111194 transitions. [2023-04-02 06:53:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 06:53:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 78590 states and 111194 transitions. [2023-04-02 06:53:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 06:53:27,411 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:27,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:53:27,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:53:27,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:27,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1719892797, now seen corresponding path program 1 times [2023-04-02 06:53:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989805528] [2023-04-02 06:53:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:27,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:53:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989805528] [2023-04-02 06:53:27,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989805528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:27,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:27,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:53:27,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449819830] [2023-04-02 06:53:27,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:27,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:53:27,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:53:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:53:27,716 INFO L87 Difference]: Start difference. First operand 78590 states and 111194 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 06:53:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:48,505 INFO L93 Difference]: Finished difference Result 231440 states and 326485 transitions. [2023-04-02 06:53:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:53:48,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 114 [2023-04-02 06:53:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:48,851 INFO L225 Difference]: With dead ends: 231440 [2023-04-02 06:53:48,851 INFO L226 Difference]: Without dead ends: 152863 [2023-04-02 06:53:48,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:53:48,953 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 457 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:48,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 561 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152863 states. [2023-04-02 06:54:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152863 to 152861. [2023-04-02 06:54:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152861 states, 152857 states have (on average 1.4005835519472447) internal successors, (214089), 152857 states have internal predecessors, (214089), 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 06:54:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152861 states to 152861 states and 214092 transitions. [2023-04-02 06:54:10,062 INFO L78 Accepts]: Start accepts. Automaton has 152861 states and 214092 transitions. Word has length 114 [2023-04-02 06:54:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:54:10,062 INFO L495 AbstractCegarLoop]: Abstraction has 152861 states and 214092 transitions. [2023-04-02 06:54:10,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 06:54:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 152861 states and 214092 transitions. [2023-04-02 06:54:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 06:54:10,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:54:10,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:10,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:54:10,068 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:54:10,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:54:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2054721385, now seen corresponding path program 1 times [2023-04-02 06:54:10,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:54:10,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340917693] [2023-04-02 06:54:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:54:10,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:54:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:54:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 06:54:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:54:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340917693] [2023-04-02 06:54:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340917693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:54:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:54:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:54:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688355891] [2023-04-02 06:54:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:54:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:54:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:54:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:54:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:54:10,256 INFO L87 Difference]: Start difference. First operand 152861 states and 214092 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 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)