/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/recursive-simple/sum_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 04:42:09,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 04:42:09,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 04:42:09,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 04:42:09,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 04:42:09,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 04:42:09,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 04:42:09,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 04:42:09,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 04:42:09,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 04:42:09,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 04:42:09,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 04:42:09,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 04:42:09,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 04:42:09,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 04:42:09,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 04:42:09,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 04:42:09,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 04:42:09,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 04:42:09,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 04:42:09,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 04:42:09,568 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 04:42:09,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 04:42:09,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 04:42:09,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 04:42:09,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 04:42:09,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 04:42:09,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 04:42:09,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 04:42:09,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 04:42:09,570 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 04:42:09,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:42:09,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 04:42:09,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 04:42:09,572 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 04:42:09,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 04:42:09,572 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 04:42:09,572 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 04:42:09,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 04:42:09,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 04:42:09,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 04:42:09,774 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 04:42:09,774 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 04:42:09,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2023-04-02 04:42:10,732 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 04:42:10,906 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 04:42:10,906 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2023-04-02 04:42:10,912 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bc5e6d6/b2580e1ae2ad4b60942fc2d1a9fe5cb3/FLAG1a97b5264 [2023-04-02 04:42:10,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bc5e6d6/b2580e1ae2ad4b60942fc2d1a9fe5cb3 [2023-04-02 04:42:10,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 04:42:10,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 04:42:10,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 04:42:10,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 04:42:10,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 04:42:10,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:42:10" (1/1) ... [2023-04-02 04:42:10,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b3508e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:10, skipping insertion in model container [2023-04-02 04:42:10,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:42:10" (1/1) ... [2023-04-02 04:42:10,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 04:42:10,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 04:42:11,036 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/recursive-simple/sum_25x0-2.c[481,494] [2023-04-02 04:42:11,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:42:11,047 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 04:42:11,055 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/recursive-simple/sum_25x0-2.c[481,494] [2023-04-02 04:42:11,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:42:11,064 INFO L208 MainTranslator]: Completed translation [2023-04-02 04:42:11,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11 WrapperNode [2023-04-02 04:42:11,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 04:42:11,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 04:42:11,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 04:42:11,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 04:42:11,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 04:42:11,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 04:42:11,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 04:42:11,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 04:42:11,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (1/1) ... [2023-04-02 04:42:11,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:42:11,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:11,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 04:42:11,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 04:42:11,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 04:42:11,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 04:42:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 04:42:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-04-02 04:42:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 04:42:11,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 04:42:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 04:42:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 04:42:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 04:42:11,178 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 04:42:11,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 04:42:11,260 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 04:42:11,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 04:42:11,264 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 04:42:11,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:42:11 BoogieIcfgContainer [2023-04-02 04:42:11,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 04:42:11,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 04:42:11,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 04:42:11,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 04:42:11,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:42:10" (1/3) ... [2023-04-02 04:42:11,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b03ad98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:42:11, skipping insertion in model container [2023-04-02 04:42:11,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:11" (2/3) ... [2023-04-02 04:42:11,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b03ad98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:42:11, skipping insertion in model container [2023-04-02 04:42:11,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:42:11" (3/3) ... [2023-04-02 04:42:11,274 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2023-04-02 04:42:11,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 04:42:11,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 04:42:11,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 04:42:11,342 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;@3c1a54f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 04:42:11,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 04:42:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 04:42:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 04:42:11,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:11,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:11,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:11,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2133330357, now seen corresponding path program 1 times [2023-04-02 04:42:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103682709] [2023-04-02 04:42:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 04:42:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103682709] [2023-04-02 04:42:11,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103682709] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 04:42:11,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 04:42:11,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 04:42:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51518366] [2023-04-02 04:42:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 04:42:11,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 04:42:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 04:42:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 04:42:11,610 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 04:42:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:11,768 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-04-02 04:42:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 04:42:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-04-02 04:42:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:11,775 INFO L225 Difference]: With dead ends: 31 [2023-04-02 04:42:11,775 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 04:42:11,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 04:42:11,779 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:11,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 04:42:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 04:42:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 04:42:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 04:42:11,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2023-04-02 04:42:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:11,821 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 04:42:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 04:42:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 04:42:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 04:42:11,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:11,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:11,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 04:42:11,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:11,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1485073517, now seen corresponding path program 1 times [2023-04-02 04:42:11,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:11,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943846677] [2023-04-02 04:42:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 04:42:11,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:11,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943846677] [2023-04-02 04:42:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943846677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246678668] [2023-04-02 04:42:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:11,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:42:12,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 04:42:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 04:42:12,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 04:42:12,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 04:42:12,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246678668] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:12,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:12,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-04-02 04:42:12,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864714422] [2023-04-02 04:42:12,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:12,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 04:42:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:12,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 04:42:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-02 04:42:12,300 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 04:42:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:12,386 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-04-02 04:42:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 04:42:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 20 [2023-04-02 04:42:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:12,388 INFO L225 Difference]: With dead ends: 26 [2023-04-02 04:42:12,388 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 04:42:12,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-04-02 04:42:12,391 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 04:42:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 04:42:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 04:42:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 04:42:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 04:42:12,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2023-04-02 04:42:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:12,403 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 04:42:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 04:42:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 04:42:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 04:42:12,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:12,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:12,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:12,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:12,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 310553675, now seen corresponding path program 2 times [2023-04-02 04:42:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608287218] [2023-04-02 04:42:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:12,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 04:42:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608287218] [2023-04-02 04:42:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608287218] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996238720] [2023-04-02 04:42:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:42:12,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:12,773 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) [2023-04-02 04:42:12,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 04:42:12,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:42:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:12,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 04:42:12,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 04:42:12,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 04:42:13,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996238720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:13,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:13,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2023-04-02 04:42:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536877311] [2023-04-02 04:42:13,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 04:42:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 04:42:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-02 04:42:13,166 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 04:42:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:13,269 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-04-02 04:42:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 04:42:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 26 [2023-04-02 04:42:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:13,271 INFO L225 Difference]: With dead ends: 29 [2023-04-02 04:42:13,271 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 04:42:13,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-04-02 04:42:13,273 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:13,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 04:42:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 04:42:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 04:42:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 04:42:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 04:42:13,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2023-04-02 04:42:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:13,284 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 04:42:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 04:42:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 04:42:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 04:42:13,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:13,286 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:13,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 04:42:13,491 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,SelfDestructingSolverStorable2 [2023-04-02 04:42:13,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:13,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash 107156371, now seen corresponding path program 3 times [2023-04-02 04:42:13,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398053421] [2023-04-02 04:42:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 04:42:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:13,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398053421] [2023-04-02 04:42:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398053421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498367377] [2023-04-02 04:42:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:42:13,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:13,758 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) [2023-04-02 04:42:13,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 04:42:13,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 04:42:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:13,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 04:42:13,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 04:42:13,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 04:42:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498367377] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:14,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 15 [2023-04-02 04:42:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477441493] [2023-04-02 04:42:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 04:42:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 04:42:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-02 04:42:14,241 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 04:42:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:14,360 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-04-02 04:42:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 04:42:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 32 [2023-04-02 04:42:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:14,363 INFO L225 Difference]: With dead ends: 32 [2023-04-02 04:42:14,363 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 04:42:14,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2023-04-02 04:42:14,364 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:14,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 04:42:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 04:42:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-02 04:42:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-04-02 04:42:14,371 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2023-04-02 04:42:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:14,372 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-04-02 04:42:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 04:42:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-04-02 04:42:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 04:42:14,373 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:14,373 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:14,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:14,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:14,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1078943157, now seen corresponding path program 4 times [2023-04-02 04:42:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:14,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022626990] [2023-04-02 04:42:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 04:42:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022626990] [2023-04-02 04:42:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022626990] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818513895] [2023-04-02 04:42:14,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:42:14,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:14,746 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) [2023-04-02 04:42:14,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 04:42:14,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:42:14,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:14,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 04:42:14,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 04:42:14,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 04:42:15,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818513895] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:15,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:15,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 17 [2023-04-02 04:42:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907731206] [2023-04-02 04:42:15,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 04:42:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 04:42:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-04-02 04:42:15,412 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2023-04-02 04:42:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:15,546 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-04-02 04:42:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 04:42:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 38 [2023-04-02 04:42:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:15,547 INFO L225 Difference]: With dead ends: 35 [2023-04-02 04:42:15,547 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 04:42:15,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-04-02 04:42:15,548 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:15,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 04:42:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 04:42:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 04:42:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-02 04:42:15,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2023-04-02 04:42:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:15,552 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-02 04:42:15,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2023-04-02 04:42:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-02 04:42:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 04:42:15,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:15,554 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:15,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 04:42:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:15,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:15,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2067901549, now seen corresponding path program 5 times [2023-04-02 04:42:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:15,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371556224] [2023-04-02 04:42:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 04:42:15,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:15,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371556224] [2023-04-02 04:42:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371556224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612725631] [2023-04-02 04:42:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:42:15,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:16,006 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) [2023-04-02 04:42:16,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 04:42:16,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-02 04:42:16,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:16,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 04:42:16,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 04:42:16,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 04:42:16,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612725631] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:16,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:16,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 19 [2023-04-02 04:42:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143305082] [2023-04-02 04:42:16,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:16,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 04:42:16,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 04:42:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-04-02 04:42:16,874 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2023-04-02 04:42:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:17,004 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2023-04-02 04:42:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 04:42:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 44 [2023-04-02 04:42:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:17,005 INFO L225 Difference]: With dead ends: 38 [2023-04-02 04:42:17,005 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 04:42:17,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2023-04-02 04:42:17,006 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:17,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 67 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 04:42:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 04:42:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-02 04:42:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-04-02 04:42:17,012 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2023-04-02 04:42:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:17,013 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-04-02 04:42:17,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2023-04-02 04:42:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-04-02 04:42:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 04:42:17,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:17,019 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:17,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:17,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:17,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:17,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash 827447371, now seen corresponding path program 6 times [2023-04-02 04:42:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:17,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557433736] [2023-04-02 04:42:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:17,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 04:42:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557433736] [2023-04-02 04:42:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557433736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177968223] [2023-04-02 04:42:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:42:17,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:17,489 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) [2023-04-02 04:42:17,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 04:42:17,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-02 04:42:17,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:17,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 04:42:17,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 04:42:17,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 04:42:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177968223] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:18,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:18,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 21 [2023-04-02 04:42:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643305568] [2023-04-02 04:42:18,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 04:42:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 04:42:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2023-04-02 04:42:18,786 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2023-04-02 04:42:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:18,926 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-04-02 04:42:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 04:42:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 50 [2023-04-02 04:42:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:18,927 INFO L225 Difference]: With dead ends: 41 [2023-04-02 04:42:18,927 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 04:42:18,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2023-04-02 04:42:18,928 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:18,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 47 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 04:42:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 04:42:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 04:42:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-04-02 04:42:18,932 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2023-04-02 04:42:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:18,932 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-04-02 04:42:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2023-04-02 04:42:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-04-02 04:42:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 04:42:18,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:18,933 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:18,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 04:42:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:19,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:19,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1830638483, now seen corresponding path program 7 times [2023-04-02 04:42:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754758027] [2023-04-02 04:42:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 04:42:19,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754758027] [2023-04-02 04:42:19,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754758027] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965554339] [2023-04-02 04:42:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:42:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:19,470 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) [2023-04-02 04:42:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 04:42:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:19,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 04:42:19,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 04:42:19,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 04:42:21,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965554339] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:21,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:21,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 23 [2023-04-02 04:42:21,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902465774] [2023-04-02 04:42:21,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:21,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 04:42:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:21,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 04:42:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2023-04-02 04:42:21,225 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (14), 2 states have call predecessors, (14), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2023-04-02 04:42:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:21,417 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-04-02 04:42:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 04:42:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (14), 2 states have call predecessors, (14), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 56 [2023-04-02 04:42:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:21,422 INFO L225 Difference]: With dead ends: 44 [2023-04-02 04:42:21,422 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 04:42:21,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 04:42:21,424 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:21,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 62 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 04:42:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 04:42:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-02 04:42:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-04-02 04:42:21,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2023-04-02 04:42:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:21,438 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-04-02 04:42:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (14), 2 states have call predecessors, (14), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2023-04-02 04:42:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-04-02 04:42:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 04:42:21,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:21,440 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:21,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:21,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:21,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:21,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 206982731, now seen corresponding path program 8 times [2023-04-02 04:42:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:21,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200765877] [2023-04-02 04:42:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:21,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-02 04:42:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200765877] [2023-04-02 04:42:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200765877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45908658] [2023-04-02 04:42:21,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:42:21,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:22,000 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) [2023-04-02 04:42:22,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 04:42:22,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:42:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:22,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 04:42:22,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-02 04:42:22,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 04:42:24,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45908658] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:24,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:24,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 25 [2023-04-02 04:42:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446688657] [2023-04-02 04:42:24,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 04:42:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 04:42:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-04-02 04:42:24,182 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 13 states have call successors, (15), 2 states have call predecessors, (15), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2023-04-02 04:42:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:24,369 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-04-02 04:42:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 04:42:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 13 states have call successors, (15), 2 states have call predecessors, (15), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 62 [2023-04-02 04:42:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:24,373 INFO L225 Difference]: With dead ends: 47 [2023-04-02 04:42:24,373 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 04:42:24,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=877, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 04:42:24,375 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:24,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 62 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 04:42:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-02 04:42:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-02 04:42:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-04-02 04:42:24,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2023-04-02 04:42:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:24,388 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-04-02 04:42:24,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 13 states have call successors, (15), 2 states have call predecessors, (15), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2023-04-02 04:42:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-04-02 04:42:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 04:42:24,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:24,389 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:24,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:24,589 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,SelfDestructingSolverStorable8 [2023-04-02 04:42:24,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:24,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1309676435, now seen corresponding path program 9 times [2023-04-02 04:42:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712818968] [2023-04-02 04:42:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-02 04:42:24,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712818968] [2023-04-02 04:42:24,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712818968] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039760077] [2023-04-02 04:42:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:42:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:24,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:24,997 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) [2023-04-02 04:42:24,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 04:42:25,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-04-02 04:42:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:25,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 04:42:25,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-02 04:42:25,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 04:42:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039760077] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:27,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:27,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2023-04-02 04:42:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517881563] [2023-04-02 04:42:27,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 04:42:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 04:42:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-04-02 04:42:27,920 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 27 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 14 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2023-04-02 04:42:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:28,140 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2023-04-02 04:42:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 04:42:28,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 14 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 68 [2023-04-02 04:42:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:28,141 INFO L225 Difference]: With dead ends: 50 [2023-04-02 04:42:28,141 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 04:42:28,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1029, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 04:42:28,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 104 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:28,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 67 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 04:42:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-02 04:42:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-02 04:42:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-04-02 04:42:28,145 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2023-04-02 04:42:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:28,145 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-04-02 04:42:28,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 14 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2023-04-02 04:42:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-04-02 04:42:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 04:42:28,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:28,146 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:28,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 04:42:28,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 04:42:28,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:28,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -240253877, now seen corresponding path program 10 times [2023-04-02 04:42:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:28,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268670365] [2023-04-02 04:42:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-04-02 04:42:28,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:28,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268670365] [2023-04-02 04:42:28,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268670365] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:28,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039766750] [2023-04-02 04:42:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:42:28,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:28,843 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) [2023-04-02 04:42:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 04:42:29,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:42:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:29,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 04:42:29,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-04-02 04:42:29,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 04:42:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039766750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:32,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 29 [2023-04-02 04:42:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16560751] [2023-04-02 04:42:32,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 04:42:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 04:42:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-04-02 04:42:32,572 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 15 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2023-04-02 04:42:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:32,796 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2023-04-02 04:42:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 04:42:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 15 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 74 [2023-04-02 04:42:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:32,797 INFO L225 Difference]: With dead ends: 53 [2023-04-02 04:42:32,797 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 04:42:32,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 147 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=1193, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 04:42:32,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:32,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 87 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 04:42:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-02 04:42:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-04-02 04:42:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-04-02 04:42:32,805 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2023-04-02 04:42:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:32,806 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-04-02 04:42:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 15 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2023-04-02 04:42:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-04-02 04:42:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 04:42:32,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:32,807 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:32,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-02 04:42:33,007 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,SelfDestructingSolverStorable10 [2023-04-02 04:42:33,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:33,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash -98135149, now seen corresponding path program 11 times [2023-04-02 04:42:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737629134] [2023-04-02 04:42:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-04-02 04:42:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737629134] [2023-04-02 04:42:33,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737629134] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71721514] [2023-04-02 04:42:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:42:33,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:33,473 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) [2023-04-02 04:42:33,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 04:42:33,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-04-02 04:42:33,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:33,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 04:42:33,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-04-02 04:42:33,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 04:42:38,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71721514] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:38,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:38,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 31 [2023-04-02 04:42:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127989645] [2023-04-02 04:42:38,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 04:42:38,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 04:42:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2023-04-02 04:42:38,273 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 31 states, 29 states have (on average 2.103448275862069) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (18), 2 states have call predecessors, (18), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-04-02 04:42:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:38,512 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2023-04-02 04:42:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 04:42:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.103448275862069) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (18), 2 states have call predecessors, (18), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 80 [2023-04-02 04:42:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:38,513 INFO L225 Difference]: With dead ends: 56 [2023-04-02 04:42:38,514 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 04:42:38,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=611, Invalid=1369, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 04:42:38,524 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 203 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:38,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 87 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 04:42:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-02 04:42:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 04:42:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-04-02 04:42:38,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2023-04-02 04:42:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:38,529 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-04-02 04:42:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.103448275862069) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (18), 2 states have call predecessors, (18), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-04-02 04:42:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-04-02 04:42:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 04:42:38,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:38,530 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:38,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-02 04:42:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 04:42:38,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:38,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2118711883, now seen corresponding path program 12 times [2023-04-02 04:42:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:38,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937028082] [2023-04-02 04:42:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:38,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:38,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-04-02 04:42:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937028082] [2023-04-02 04:42:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937028082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940199948] [2023-04-02 04:42:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:42:39,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:39,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:42:39,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 04:42:39,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-04-02 04:42:39,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:39,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 04:42:39,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-04-02 04:42:39,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 04:42:45,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940199948] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:45,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:45,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 33 [2023-04-02 04:42:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301185861] [2023-04-02 04:42:45,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 04:42:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 04:42:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 04:42:45,362 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 32 states have internal predecessors, (65), 17 states have call successors, (19), 2 states have call predecessors, (19), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2023-04-02 04:42:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:45,601 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-04-02 04:42:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 04:42:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 32 states have internal predecessors, (65), 17 states have call successors, (19), 2 states have call predecessors, (19), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 86 [2023-04-02 04:42:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:45,602 INFO L225 Difference]: With dead ends: 59 [2023-04-02 04:42:45,602 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 04:42:45,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=1557, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 04:42:45,603 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:45,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 82 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 04:42:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-02 04:42:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-04-02 04:42:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2023-04-02 04:42:45,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2023-04-02 04:42:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:45,606 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2023-04-02 04:42:45,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.096774193548387) internal successors, (65), 32 states have internal predecessors, (65), 17 states have call successors, (19), 2 states have call predecessors, (19), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2023-04-02 04:42:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2023-04-02 04:42:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 04:42:45,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:45,607 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:45,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 04:42:45,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 04:42:45,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:45,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2014260333, now seen corresponding path program 13 times [2023-04-02 04:42:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:45,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506424694] [2023-04-02 04:42:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-04-02 04:42:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506424694] [2023-04-02 04:42:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506424694] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664281319] [2023-04-02 04:42:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:42:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:46,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:42:46,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 04:42:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:46,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 04:42:46,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-04-02 04:42:46,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:42:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 04:42:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664281319] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:42:53,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:42:53,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 35 [2023-04-02 04:42:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504033232] [2023-04-02 04:42:53,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:42:53,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 04:42:53,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:42:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 04:42:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 04:42:53,998 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 34 states have internal predecessors, (69), 18 states have call successors, (20), 2 states have call predecessors, (20), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2023-04-02 04:42:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:42:54,262 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2023-04-02 04:42:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 04:42:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 34 states have internal predecessors, (69), 18 states have call successors, (20), 2 states have call predecessors, (20), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 92 [2023-04-02 04:42:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:42:54,263 INFO L225 Difference]: With dead ends: 62 [2023-04-02 04:42:54,263 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 04:42:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=793, Invalid=1757, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 04:42:54,264 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:42:54,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 82 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:42:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 04:42:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 04:42:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-02 04:42:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-04-02 04:42:54,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2023-04-02 04:42:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:42:54,267 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-04-02 04:42:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.090909090909091) internal successors, (69), 34 states have internal predecessors, (69), 18 states have call successors, (20), 2 states have call predecessors, (20), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2023-04-02 04:42:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-04-02 04:42:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 04:42:54,268 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:42:54,268 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:42:54,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 04:42:54,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 04:42:54,475 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:42:54,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:42:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1259810891, now seen corresponding path program 14 times [2023-04-02 04:42:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:42:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860461714] [2023-04-02 04:42:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:42:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:42:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:42:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:42:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:54,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:42:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:42:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-02 04:42:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:42:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860461714] [2023-04-02 04:42:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860461714] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:42:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300423273] [2023-04-02 04:42:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:42:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:42:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:42:55,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:42:55,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 04:42:55,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:42:55,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:42:55,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 04:42:55,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:42:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-02 04:42:55,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:43:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-02 04:43:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300423273] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:43:04,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:43:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 37 [2023-04-02 04:43:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202148035] [2023-04-02 04:43:04,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:43:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 04:43:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:43:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 04:43:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 04:43:04,188 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 36 states have internal predecessors, (73), 19 states have call successors, (21), 2 states have call predecessors, (21), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2023-04-02 04:43:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:43:04,474 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-04-02 04:43:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 04:43:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 36 states have internal predecessors, (73), 19 states have call successors, (21), 2 states have call predecessors, (21), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 98 [2023-04-02 04:43:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:43:04,475 INFO L225 Difference]: With dead ends: 65 [2023-04-02 04:43:04,475 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 04:43:04,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 195 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=893, Invalid=1969, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 04:43:04,476 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:43:04,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 92 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:43:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 04:43:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-04-02 04:43:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 04:43:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-02 04:43:04,482 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2023-04-02 04:43:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:43:04,482 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-02 04:43:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 36 states have internal predecessors, (73), 19 states have call successors, (21), 2 states have call predecessors, (21), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2023-04-02 04:43:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-02 04:43:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 04:43:04,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:43:04,483 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:43:04,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 04:43:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:04,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:43:04,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:43:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1375654803, now seen corresponding path program 15 times [2023-04-02 04:43:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:43:04,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115788713] [2023-04-02 04:43:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:43:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:43:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:04,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:43:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:04,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:43:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:04,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:04,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-04-02 04:43:05,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:43:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115788713] [2023-04-02 04:43:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115788713] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:43:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650510615] [2023-04-02 04:43:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:43:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:43:05,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:43:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 04:43:06,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-02 04:43:06,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:43:06,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 04:43:06,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:43:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-04-02 04:43:06,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:43:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 04:43:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650510615] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:43:16,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:43:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 39 [2023-04-02 04:43:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482159234] [2023-04-02 04:43:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:43:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 04:43:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:43:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 04:43:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 04:43:16,841 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 38 states have internal predecessors, (77), 20 states have call successors, (22), 2 states have call predecessors, (22), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2023-04-02 04:43:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:43:17,124 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2023-04-02 04:43:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 04:43:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 38 states have internal predecessors, (77), 20 states have call successors, (22), 2 states have call predecessors, (22), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 104 [2023-04-02 04:43:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:43:17,126 INFO L225 Difference]: With dead ends: 68 [2023-04-02 04:43:17,126 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 04:43:17,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 207 SyntacticMatches, 16 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2193, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 04:43:17,127 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:43:17,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 97 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:43:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 04:43:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-04-02 04:43:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-04-02 04:43:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-04-02 04:43:17,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2023-04-02 04:43:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:43:17,139 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-04-02 04:43:17,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.081081081081081) internal successors, (77), 38 states have internal predecessors, (77), 20 states have call successors, (22), 2 states have call predecessors, (22), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2023-04-02 04:43:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-04-02 04:43:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 04:43:17,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:43:17,140 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:43:17,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 04:43:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 04:43:17,341 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:43:17,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:43:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash -318200245, now seen corresponding path program 16 times [2023-04-02 04:43:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:43:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006069658] [2023-04-02 04:43:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:43:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:43:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:43:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:43:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:17,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-04-02 04:43:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:43:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006069658] [2023-04-02 04:43:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006069658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:43:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651261879] [2023-04-02 04:43:18,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:43:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:43:18,276 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:43:18,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 04:43:19,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:43:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:43:19,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 04:43:19,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:43:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-04-02 04:43:19,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:43:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-04-02 04:43:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651261879] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:43:31,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:43:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 41 [2023-04-02 04:43:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419649538] [2023-04-02 04:43:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:43:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 04:43:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:43:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 04:43:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 04:43:31,673 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 40 states have internal predecessors, (81), 21 states have call successors, (23), 2 states have call predecessors, (23), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2023-04-02 04:43:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:43:31,992 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2023-04-02 04:43:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 04:43:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 40 states have internal predecessors, (81), 21 states have call successors, (23), 2 states have call predecessors, (23), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 110 [2023-04-02 04:43:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:43:31,994 INFO L225 Difference]: With dead ends: 71 [2023-04-02 04:43:31,994 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 04:43:31,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 219 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1111, Invalid=2429, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 04:43:31,996 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 209 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:43:31,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 107 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:43:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 04:43:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-04-02 04:43:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-04-02 04:43:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2023-04-02 04:43:31,999 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2023-04-02 04:43:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:43:31,999 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2023-04-02 04:43:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 40 states have internal predecessors, (81), 21 states have call successors, (23), 2 states have call predecessors, (23), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2023-04-02 04:43:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2023-04-02 04:43:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-02 04:43:32,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:43:32,000 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:43:32,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-04-02 04:43:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 04:43:32,210 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:43:32,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:43:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -153054317, now seen corresponding path program 17 times [2023-04-02 04:43:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:43:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836261079] [2023-04-02 04:43:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:43:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:43:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:43:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:43:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-04-02 04:43:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:43:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836261079] [2023-04-02 04:43:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836261079] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:43:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406813911] [2023-04-02 04:43:33,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:43:33,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:43:33,313 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:43:33,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 04:43:34,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-04-02 04:43:34,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:43:34,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 04:43:34,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:43:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-04-02 04:43:34,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:43:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-02 04:43:49,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406813911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:43:49,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:43:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 43 [2023-04-02 04:43:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399187243] [2023-04-02 04:43:49,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:43:49,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 04:43:49,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:43:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 04:43:49,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 04:43:49,312 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 43 states, 41 states have (on average 2.073170731707317) internal successors, (85), 42 states have internal predecessors, (85), 22 states have call successors, (24), 2 states have call predecessors, (24), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2023-04-02 04:43:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:43:49,657 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2023-04-02 04:43:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 04:43:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.073170731707317) internal successors, (85), 42 states have internal predecessors, (85), 22 states have call successors, (24), 2 states have call predecessors, (24), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 116 [2023-04-02 04:43:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:43:49,659 INFO L225 Difference]: With dead ends: 74 [2023-04-02 04:43:49,659 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 04:43:49,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 231 SyntacticMatches, 18 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1229, Invalid=2677, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 04:43:49,660 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 276 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:43:49,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 107 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:43:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 04:43:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-02 04:43:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-02 04:43:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2023-04-02 04:43:49,663 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2023-04-02 04:43:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:43:49,663 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2023-04-02 04:43:49,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.073170731707317) internal successors, (85), 42 states have internal predecessors, (85), 22 states have call successors, (24), 2 states have call predecessors, (24), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2023-04-02 04:43:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2023-04-02 04:43:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 04:43:49,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:43:49,664 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:43:49,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 04:43:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 04:43:49,877 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:43:49,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:43:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -183673781, now seen corresponding path program 18 times [2023-04-02 04:43:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:43:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648902159] [2023-04-02 04:43:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:43:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:43:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:43:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:43:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:51,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:51,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-04-02 04:43:51,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:43:51,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648902159] [2023-04-02 04:43:51,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648902159] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:43:51,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971171070] [2023-04-02 04:43:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:43:51,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:43:51,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:43:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 04:43:52,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-04-02 04:43:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:43:52,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 04:43:52,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:43:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-04-02 04:43:52,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:44:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-04-02 04:44:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971171070] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:44:10,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:44:10,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 45 [2023-04-02 04:44:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749996132] [2023-04-02 04:44:10,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:44:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 04:44:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:44:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 04:44:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 04:44:10,147 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 45 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 23 states have call successors, (25), 2 states have call predecessors, (25), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2023-04-02 04:44:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:44:10,481 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2023-04-02 04:44:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 04:44:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 23 states have call successors, (25), 2 states have call predecessors, (25), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 122 [2023-04-02 04:44:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:44:10,483 INFO L225 Difference]: With dead ends: 77 [2023-04-02 04:44:10,483 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 04:44:10,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 243 SyntacticMatches, 19 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1353, Invalid=2937, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 04:44:10,485 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 196 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:44:10,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 117 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:44:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 04:44:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-02 04:44:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 04:44:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-04-02 04:44:10,488 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2023-04-02 04:44:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:44:10,488 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-04-02 04:44:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 44 states have internal predecessors, (89), 23 states have call successors, (25), 2 states have call predecessors, (25), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2023-04-02 04:44:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-04-02 04:44:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 04:44:10,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:44:10,489 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:44:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 04:44:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:44:10,701 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:44:10,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:44:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1495667603, now seen corresponding path program 19 times [2023-04-02 04:44:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:44:10,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885024383] [2023-04-02 04:44:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:44:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:44:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:44:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:10,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:44:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2023-04-02 04:44:12,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:44:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885024383] [2023-04-02 04:44:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885024383] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:44:12,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811895250] [2023-04-02 04:44:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:44:12,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:44:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:44:12,030 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:44:12,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 04:44:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:13,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 04:44:13,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:44:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2023-04-02 04:44:13,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:44:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-02 04:44:34,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811895250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:44:34,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:44:34,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 47 [2023-04-02 04:44:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720444219] [2023-04-02 04:44:34,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:44:34,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-02 04:44:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:44:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-02 04:44:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=1629, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 04:44:34,594 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 47 states, 45 states have (on average 2.066666666666667) internal successors, (93), 46 states have internal predecessors, (93), 24 states have call successors, (26), 2 states have call predecessors, (26), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2023-04-02 04:44:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:44:34,973 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2023-04-02 04:44:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 04:44:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.066666666666667) internal successors, (93), 46 states have internal predecessors, (93), 24 states have call successors, (26), 2 states have call predecessors, (26), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 128 [2023-04-02 04:44:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:44:34,981 INFO L225 Difference]: With dead ends: 80 [2023-04-02 04:44:34,982 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 04:44:34,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 255 SyntacticMatches, 20 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 04:44:34,983 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 240 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 04:44:34,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 127 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 04:44:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 04:44:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-04-02 04:44:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 04:44:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-04-02 04:44:34,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2023-04-02 04:44:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:44:34,992 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-04-02 04:44:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.066666666666667) internal successors, (93), 46 states have internal predecessors, (93), 24 states have call successors, (26), 2 states have call predecessors, (26), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2023-04-02 04:44:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-04-02 04:44:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 04:44:34,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:44:34,992 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:44:35,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-02 04:44:35,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:44:35,206 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:44:35,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:44:35,206 INFO L85 PathProgramCache]: Analyzing trace with hash -267038133, now seen corresponding path program 20 times [2023-04-02 04:44:35,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:44:35,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771695805] [2023-04-02 04:44:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:44:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:44:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:44:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:44:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:35,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:44:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:44:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-04-02 04:44:36,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:44:36,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771695805] [2023-04-02 04:44:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771695805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:44:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302118917] [2023-04-02 04:44:36,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:44:36,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:44:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:44:36,620 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:44:36,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 04:44:38,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:44:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:44:38,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 04:44:38,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:44:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-04-02 04:44:38,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:45:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 04:45:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302118917] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:45:02,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:45:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 49 [2023-04-02 04:45:02,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872328794] [2023-04-02 04:45:02,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:45:02,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 04:45:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:45:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 04:45:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1772, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 04:45:02,187 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 49 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 25 states have call successors, (27), 2 states have call predecessors, (27), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2023-04-02 04:45:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:45:02,538 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2023-04-02 04:45:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 04:45:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 25 states have call successors, (27), 2 states have call predecessors, (27), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 134 [2023-04-02 04:45:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:45:02,540 INFO L225 Difference]: With dead ends: 83 [2023-04-02 04:45:02,540 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 04:45:02,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 267 SyntacticMatches, 21 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1619, Invalid=3493, Unknown=0, NotChecked=0, Total=5112 [2023-04-02 04:45:02,541 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 123 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:45:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 132 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:45:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 04:45:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-02 04:45:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-02 04:45:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2023-04-02 04:45:02,544 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2023-04-02 04:45:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:45:02,545 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2023-04-02 04:45:02,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 48 states have internal predecessors, (97), 25 states have call successors, (27), 2 states have call predecessors, (27), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2023-04-02 04:45:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2023-04-02 04:45:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 04:45:02,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:45:02,545 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:45:02,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-02 04:45:02,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-02 04:45:02,758 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:45:02,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:45:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1621142637, now seen corresponding path program 21 times [2023-04-02 04:45:02,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:45:02,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360743856] [2023-04-02 04:45:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:45:02,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:45:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:02,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:45:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:02,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:45:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-04-02 04:45:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:45:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360743856] [2023-04-02 04:45:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360743856] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:45:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407078300] [2023-04-02 04:45:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:45:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:45:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:45:04,369 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:45:04,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 04:45:06,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-04-02 04:45:06,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:45:06,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 04:45:06,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:45:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-04-02 04:45:06,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:45:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-02 04:45:34,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407078300] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:45:34,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:45:34,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 47] total 51 [2023-04-02 04:45:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411471827] [2023-04-02 04:45:34,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:45:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 04:45:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:45:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 04:45:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=1921, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 04:45:34,170 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 51 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 26 states have call successors, (28), 2 states have call predecessors, (28), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2023-04-02 04:45:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:45:34,575 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2023-04-02 04:45:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 04:45:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 26 states have call successors, (28), 2 states have call predecessors, (28), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) Word has length 140 [2023-04-02 04:45:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:45:34,578 INFO L225 Difference]: With dead ends: 86 [2023-04-02 04:45:34,578 INFO L226 Difference]: Without dead ends: 82 [2023-04-02 04:45:34,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 279 SyntacticMatches, 22 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1761, Invalid=3789, Unknown=0, NotChecked=0, Total=5550 [2023-04-02 04:45:34,580 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 233 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 04:45:34,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 132 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 04:45:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-02 04:45:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-04-02 04:45:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 54 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-02 04:45:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2023-04-02 04:45:34,584 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2023-04-02 04:45:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:45:34,585 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2023-04-02 04:45:34,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 26 states have call successors, (28), 2 states have call predecessors, (28), 23 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2023-04-02 04:45:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2023-04-02 04:45:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-02 04:45:34,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:45:34,586 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:45:34,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-02 04:45:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-02 04:45:34,800 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:45:34,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:45:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1729136715, now seen corresponding path program 22 times [2023-04-02 04:45:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:45:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322334819] [2023-04-02 04:45:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:45:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:45:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:45:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:34,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:45:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:45:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:45:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-04-02 04:45:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:45:36,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322334819] [2023-04-02 04:45:36,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322334819] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:45:36,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626311456] [2023-04-02 04:45:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:45:36,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:45:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:45:36,655 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:45:36,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-02 04:45:39,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:45:39,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:45:39,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 04:45:39,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:45:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-04-02 04:45:39,228 INFO L327 TraceCheckSpWp]: Computing backward predicates...