/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/array-examples/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:04:57,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:04:57,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:04:57,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 22:04:57,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 22:04:57,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 22:04:57,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 22:04:57,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 22:04:57,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 22:04:57,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 22:04:57,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 22:04:57,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 22:04:57,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:04:57,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:04:57,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:04:57,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:04:57,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:04:57,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:04:57,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:04:57,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:04:57,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:04:57,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:04:57,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:04:57,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:04:57,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:04:57,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:04:57,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:04:57,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:04:57,323 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 [2023-03-30 22:04:57,351 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:04:57,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:04:57,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:04:57,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:04:57,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:04:57,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:04:57,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:04:57,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:04:57,354 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:04:57,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:04:57,354 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:04:57,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:04:57,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:04:57,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:04:57,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:04:57,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:04:57,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:04:57,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:04:57,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:04:57,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:04:57,357 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:04:57,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:04:57,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:04:57,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:04:57,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:04:57,555 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:04:57,556 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:04:57,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-03-30 22:04:58,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:04:58,689 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:04:58,689 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-03-30 22:04:58,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4df93a4/2d763e90b1684bbbb79c52ddd4ef3020/FLAGa09d1af86 [2023-03-30 22:04:58,706 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4df93a4/2d763e90b1684bbbb79c52ddd4ef3020 [2023-03-30 22:04:58,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:04:58,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:04:58,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:04:58,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:04:58,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:04:58,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663a6aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58, skipping insertion in model container [2023-03-30 22:04:58,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:04:58,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:04:58,842 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/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-03-30 22:04:58,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:04:58,863 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:04:58,872 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/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-03-30 22:04:58,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:04:58,889 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:04:58,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58 WrapperNode [2023-03-30 22:04:58,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:04:58,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:04:58,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:04:58,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:04:58,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,910 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:04:58,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:04:58,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:04:58,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:04:58,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (1/1) ... [2023-03-30 22:04:58,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:04:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:04:58,948 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) [2023-03-30 22:04:58,950 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 [2023-03-30 22:04:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:04:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:04:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:04:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:04:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:04:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:04:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:04:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:04:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:04:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:04:59,020 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:04:59,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:04:59,122 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:04:59,126 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:04:59,126 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-30 22:04:59,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:04:59 BoogieIcfgContainer [2023-03-30 22:04:59,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:04:59,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:04:59,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:04:59,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:04:59,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:04:58" (1/3) ... [2023-03-30 22:04:59,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56012775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:04:59, skipping insertion in model container [2023-03-30 22:04:59,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:04:58" (2/3) ... [2023-03-30 22:04:59,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56012775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:04:59, skipping insertion in model container [2023-03-30 22:04:59,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:04:59" (3/3) ... [2023-03-30 22:04:59,137 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-03-30 22:04:59,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:04:59,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:04:59,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:04:59,179 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;@4b18d1cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:04:59,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:04:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:04:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-30 22:04:59,186 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:04:59,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:04:59,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:04:59,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:04:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash 498599300, now seen corresponding path program 1 times [2023-03-30 22:04:59,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:04:59,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957115869] [2023-03-30 22:04:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:04:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:04:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:04:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:04:59,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:04:59,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957115869] [2023-03-30 22:04:59,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957115869] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:04:59,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:04:59,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:04:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388099639] [2023-03-30 22:04:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:04:59,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:04:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:04:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:04:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:04:59,385 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:04:59,455 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-03-30 22:04:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:04:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-30 22:04:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:04:59,461 INFO L225 Difference]: With dead ends: 54 [2023-03-30 22:04:59,461 INFO L226 Difference]: Without dead ends: 26 [2023-03-30 22:04:59,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:04:59,468 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:04:59,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:04:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-30 22:04:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-30 22:04:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:04:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-03-30 22:04:59,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2023-03-30 22:04:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:04:59,509 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-03-30 22:04:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-03-30 22:04:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-30 22:04:59,510 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:04:59,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:04:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:04:59,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:04:59,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:04:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash 247748289, now seen corresponding path program 1 times [2023-03-30 22:04:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:04:59,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443161638] [2023-03-30 22:04:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:04:59,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:04:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:04:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:04:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:04:59,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443161638] [2023-03-30 22:04:59,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443161638] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:04:59,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:04:59,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:04:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537870725] [2023-03-30 22:04:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:04:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:04:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:04:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:04:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:04:59,641 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:04:59,740 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-03-30 22:04:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:04:59,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-30 22:04:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:04:59,741 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:04:59,741 INFO L226 Difference]: Without dead ends: 28 [2023-03-30 22:04:59,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:04:59,742 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:04:59,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:04:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-30 22:04:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-03-30 22:04:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:04:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-03-30 22:04:59,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2023-03-30 22:04:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:04:59,749 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-03-30 22:04:59,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-03-30 22:04:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-30 22:04:59,750 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:04:59,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:04:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:04:59,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:04:59,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:04:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1572069859, now seen corresponding path program 1 times [2023-03-30 22:04:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:04:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169471822] [2023-03-30 22:04:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:04:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:04:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:04:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:04:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:04:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169471822] [2023-03-30 22:04:59,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169471822] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:04:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377285549] [2023-03-30 22:04:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:04:59,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:04:59,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:04:59,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:04:59,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:04:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:04:59,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:04:59,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:04:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:04:59,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:04:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377285549] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:04:59,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:04:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:04:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316655512] [2023-03-30 22:04:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:04:59,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:04:59,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:04:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:04:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:04:59,968 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:04:59,991 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-03-30 22:04:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:04:59,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-30 22:04:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:04:59,992 INFO L225 Difference]: With dead ends: 44 [2023-03-30 22:04:59,992 INFO L226 Difference]: Without dead ends: 31 [2023-03-30 22:04:59,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:04:59,993 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:04:59,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:04:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-30 22:04:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-30 22:04:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:04:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-03-30 22:04:59,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-03-30 22:04:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:04:59,998 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-03-30 22:04:59,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:04:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-03-30 22:04:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-30 22:04:59,999 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:04:59,999 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] [2023-03-30 22:05:00,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:00,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:00,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1883512810, now seen corresponding path program 1 times [2023-03-30 22:05:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064838602] [2023-03-30 22:05:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:00,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064838602] [2023-03-30 22:05:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064838602] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548241118] [2023-03-30 22:05:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:00,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:00,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:00,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:00,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:05:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 22:05:00,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:05:00,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:05:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548241118] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:05:00,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:05:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 22:05:00,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412415522] [2023-03-30 22:05:00,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:05:00,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:05:00,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:00,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:05:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:00,404 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:00,414 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-03-30 22:05:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:05:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-03-30 22:05:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:00,415 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:05:00,415 INFO L226 Difference]: Without dead ends: 35 [2023-03-30 22:05:00,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:05:00,416 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:00,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:05:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-30 22:05:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-03-30 22:05:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-03-30 22:05:00,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2023-03-30 22:05:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:00,421 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-03-30 22:05:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-03-30 22:05:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-30 22:05:00,421 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:00,422 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] [2023-03-30 22:05:00,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:05:00,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:05:00,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:00,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:00,645 INFO L85 PathProgramCache]: Analyzing trace with hash -45337753, now seen corresponding path program 1 times [2023-03-30 22:05:00,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719770451] [2023-03-30 22:05:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719770451] [2023-03-30 22:05:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719770451] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900545986] [2023-03-30 22:05:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:00,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:00,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:00,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:05:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:00,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:05:00,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:00,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900545986] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:00,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:00,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:05:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178639547] [2023-03-30 22:05:00,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:00,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:05:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:05:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:05:00,859 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:00,975 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-03-30 22:05:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:05:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-03-30 22:05:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:00,978 INFO L225 Difference]: With dead ends: 61 [2023-03-30 22:05:00,978 INFO L226 Difference]: Without dead ends: 38 [2023-03-30 22:05:00,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:05:00,979 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:00,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-30 22:05:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-30 22:05:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-03-30 22:05:00,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2023-03-30 22:05:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:00,985 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-03-30 22:05:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-03-30 22:05:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:05:00,986 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:00,986 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:01,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:01,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:01,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:01,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 317957313, now seen corresponding path program 2 times [2023-03-30 22:05:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886138860] [2023-03-30 22:05:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:05:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886138860] [2023-03-30 22:05:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886138860] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290535437] [2023-03-30 22:05:01,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:05:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:01,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:01,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:01,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:05:01,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:05:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:01,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:05:01,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:01,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:05:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290535437] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:01,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-03-30 22:05:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762694005] [2023-03-30 22:05:01,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:05:01,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:05:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:05:01,421 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:01,621 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2023-03-30 22:05:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:05:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-03-30 22:05:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:01,624 INFO L225 Difference]: With dead ends: 82 [2023-03-30 22:05:01,624 INFO L226 Difference]: Without dead ends: 59 [2023-03-30 22:05:01,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-03-30 22:05:01,625 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:01,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-30 22:05:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-03-30 22:05:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-03-30 22:05:01,632 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2023-03-30 22:05:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:01,632 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-03-30 22:05:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-03-30 22:05:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-30 22:05:01,633 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:01,633 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:01,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 22:05:01,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:01,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:01,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1061801596, now seen corresponding path program 3 times [2023-03-30 22:05:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139439108] [2023-03-30 22:05:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:01,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:05:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139439108] [2023-03-30 22:05:01,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139439108] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739903870] [2023-03-30 22:05:01,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:05:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:01,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:01,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:05:02,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-30 22:05:02,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:02,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:05:02,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:05:02,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 22:05:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739903870] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:02,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:02,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-03-30 22:05:02,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858503847] [2023-03-30 22:05:02,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-30 22:05:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-30 22:05:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:05:02,095 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:02,223 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2023-03-30 22:05:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:05:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-03-30 22:05:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:02,225 INFO L225 Difference]: With dead ends: 106 [2023-03-30 22:05:02,225 INFO L226 Difference]: Without dead ends: 79 [2023-03-30 22:05:02,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-03-30 22:05:02,227 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:02,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 22 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-30 22:05:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-03-30 22:05:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2023-03-30 22:05:02,246 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 44 [2023-03-30 22:05:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:02,246 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2023-03-30 22:05:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2023-03-30 22:05:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-30 22:05:02,247 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:02,247 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:02,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:02,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:02,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1776075068, now seen corresponding path program 4 times [2023-03-30 22:05:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:02,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161237164] [2023-03-30 22:05:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-30 22:05:02,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161237164] [2023-03-30 22:05:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161237164] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290416800] [2023-03-30 22:05:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:05:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:02,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:02,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:05:02,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:05:02,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:02,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:05:02,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-30 22:05:02,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-30 22:05:02,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290416800] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:02,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:02,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:05:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044355153] [2023-03-30 22:05:02,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:02,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:05:02,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:05:02,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:05:02,992 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:03,358 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2023-03-30 22:05:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:05:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-03-30 22:05:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:03,360 INFO L225 Difference]: With dead ends: 155 [2023-03-30 22:05:03,360 INFO L226 Difference]: Without dead ends: 103 [2023-03-30 22:05:03,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:05:03,361 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:03,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 27 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-03-30 22:05:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-03-30 22:05:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2023-03-30 22:05:03,369 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 56 [2023-03-30 22:05:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:03,369 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2023-03-30 22:05:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2023-03-30 22:05:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-30 22:05:03,371 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:03,371 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:03,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:03,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:03,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1286319572, now seen corresponding path program 5 times [2023-03-30 22:05:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621563449] [2023-03-30 22:05:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:03,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-30 22:05:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621563449] [2023-03-30 22:05:04,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621563449] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142930346] [2023-03-30 22:05:04,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:05:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:04,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:04,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:04,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:05:04,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-03-30 22:05:04,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:04,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:05:04,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-03-30 22:05:04,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-03-30 22:05:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142930346] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:04,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:04,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-03-30 22:05:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726991248] [2023-03-30 22:05:04,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-03-30 22:05:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-03-30 22:05:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-03-30 22:05:04,561 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:05,274 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2023-03-30 22:05:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 22:05:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-03-30 22:05:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:05,276 INFO L225 Difference]: With dead ends: 206 [2023-03-30 22:05:05,276 INFO L226 Difference]: Without dead ends: 154 [2023-03-30 22:05:05,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-03-30 22:05:05,278 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:05,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 47 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-03-30 22:05:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2023-03-30 22:05:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.2244897959183674) internal successors, (180), 147 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 185 transitions. [2023-03-30 22:05:05,287 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 185 transitions. Word has length 80 [2023-03-30 22:05:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:05,287 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 185 transitions. [2023-03-30 22:05:05,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 185 transitions. [2023-03-30 22:05:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-30 22:05:05,289 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:05,289 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:05,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-30 22:05:05,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:05,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:05,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash 718774390, now seen corresponding path program 6 times [2023-03-30 22:05:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:05,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140070270] [2023-03-30 22:05:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:06,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140070270] [2023-03-30 22:05:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140070270] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498038422] [2023-03-30 22:05:06,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:05:06,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:06,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:06,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:06,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:05:06,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-03-30 22:05:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:06,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-30 22:05:06,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:06,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498038422] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:07,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:07,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-03-30 22:05:07,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918984060] [2023-03-30 22:05:07,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-03-30 22:05:07,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-03-30 22:05:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-03-30 22:05:07,525 INFO L87 Difference]: Start difference. First operand 153 states and 185 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:08,522 INFO L93 Difference]: Finished difference Result 303 states and 391 transitions. [2023-03-30 22:05:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-03-30 22:05:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2023-03-30 22:05:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:08,524 INFO L225 Difference]: With dead ends: 303 [2023-03-30 22:05:08,524 INFO L226 Difference]: Without dead ends: 203 [2023-03-30 22:05:08,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-03-30 22:05:08,527 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:08,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 32 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:05:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-03-30 22:05:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-03-30 22:05:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 235 transitions. [2023-03-30 22:05:08,535 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 235 transitions. Word has length 106 [2023-03-30 22:05:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:08,535 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 235 transitions. [2023-03-30 22:05:08,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 235 transitions. [2023-03-30 22:05:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-03-30 22:05:08,537 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:08,537 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 22:05:08,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:08,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1111486024, now seen corresponding path program 7 times [2023-03-30 22:05:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011459614] [2023-03-30 22:05:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:10,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011459614] [2023-03-30 22:05:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011459614] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:10,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493059019] [2023-03-30 22:05:10,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:05:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:10,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:10,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:05:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:10,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-30 22:05:10,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:10,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:12,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493059019] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:12,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:12,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-03-30 22:05:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44414355] [2023-03-30 22:05:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-03-30 22:05:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-03-30 22:05:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-03-30 22:05:12,792 INFO L87 Difference]: Start difference. First operand 203 states and 235 transitions. Second operand has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:16,222 INFO L93 Difference]: Finished difference Result 403 states and 516 transitions. [2023-03-30 22:05:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-03-30 22:05:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2023-03-30 22:05:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:16,224 INFO L225 Difference]: With dead ends: 403 [2023-03-30 22:05:16,224 INFO L226 Difference]: Without dead ends: 303 [2023-03-30 22:05:16,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-03-30 22:05:16,230 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 222 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:16,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 27 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:05:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-03-30 22:05:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2023-03-30 22:05:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.1111111111111112) internal successors, (330), 297 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 335 transitions. [2023-03-30 22:05:16,239 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 335 transitions. Word has length 156 [2023-03-30 22:05:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:16,240 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 335 transitions. [2023-03-30 22:05:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 335 transitions. [2023-03-30 22:05:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-03-30 22:05:16,244 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:16,244 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:16,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-30 22:05:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:16,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:16,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1541726100, now seen corresponding path program 8 times [2023-03-30 22:05:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:16,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881892111] [2023-03-30 22:05:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:21,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:21,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881892111] [2023-03-30 22:05:21,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881892111] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822564244] [2023-03-30 22:05:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:05:21,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:21,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:21,564 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:21,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:05:21,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:05:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:21,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 100 conjunts are in the unsatisfiable core [2023-03-30 22:05:21,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:22,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:30,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822564244] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:30,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:30,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2023-03-30 22:05:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204337305] [2023-03-30 22:05:30,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:30,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-03-30 22:05:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-03-30 22:05:30,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2023-03-30 22:05:30,732 INFO L87 Difference]: Start difference. First operand 303 states and 335 transitions. Second operand has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:05:41,440 INFO L93 Difference]: Finished difference Result 603 states and 766 transitions. [2023-03-30 22:05:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-03-30 22:05:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2023-03-30 22:05:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:05:41,444 INFO L225 Difference]: With dead ends: 603 [2023-03-30 22:05:41,444 INFO L226 Difference]: Without dead ends: 503 [2023-03-30 22:05:41,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24942 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=59901, Invalid=99699, Unknown=0, NotChecked=0, Total=159600 [2023-03-30 22:05:41,451 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 422 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:05:41,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 67 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:05:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-03-30 22:05:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2023-03-30 22:05:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.0663983903420524) internal successors, (530), 497 states have internal predecessors, (530), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:05:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 535 transitions. [2023-03-30 22:05:41,466 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 535 transitions. Word has length 256 [2023-03-30 22:05:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:05:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 535 transitions. [2023-03-30 22:05:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:05:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 535 transitions. [2023-03-30 22:05:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-03-30 22:05:41,470 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:05:41,470 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:05:41,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:05:41,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 22:05:41,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:05:41,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:05:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1536467276, now seen corresponding path program 9 times [2023-03-30 22:05:41,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:05:41,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666649648] [2023-03-30 22:05:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:05:41,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:05:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:57,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:05:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:05:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 0 proven. 39204 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-03-30 22:05:57,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:05:57,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666649648] [2023-03-30 22:05:57,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666649648] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:05:57,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835161262] [2023-03-30 22:05:57,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:05:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:05:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:05:57,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:05:57,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:05:57,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-03-30 22:05:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:05:57,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-30 22:05:57,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:05:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 39204 trivial. 0 not checked. [2023-03-30 22:05:58,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:05:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 39204 trivial. 0 not checked. [2023-03-30 22:05:59,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835161262] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:05:59,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:05:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 17, 17] total 232 [2023-03-30 22:05:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941608771] [2023-03-30 22:05:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:05:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 232 states [2023-03-30 22:05:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:05:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2023-03-30 22:05:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20597, Invalid=32995, Unknown=0, NotChecked=0, Total=53592 [2023-03-30 22:05:59,348 INFO L87 Difference]: Start difference. First operand 503 states and 535 transitions. Second operand has 232 states, 232 states have (on average 2.185344827586207) internal successors, (507), 231 states have internal predecessors, (507), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)