/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/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 04:40:48,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 04:40:48,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 04:40:48,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 04:40:48,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 04:40:48,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 04:40:48,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 04:40:48,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 04:40:48,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 04:40:48,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 04:40:48,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 04:40:48,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 04:40:48,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 04:40:48,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 04:40:48,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 04:40:48,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 04:40:48,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 04:40:48,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 04:40:48,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 04:40:48,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 04:40:48,735 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 04:40:48,755 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 04:40:48,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 04:40:48,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 04:40:48,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 04:40:48,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 04:40:48,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 04:40:48,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 04:40:48,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 04:40:48,758 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 04:40:48,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 04:40:48,758 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 04:40:48,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 04:40:48,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 04:40:48,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:40:48,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 04:40:48,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 04:40:48,761 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 04:40:48,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 04:40:48,761 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 04:40:48,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 04:40:48,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 04:40:48,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 04:40:48,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 04:40:48,954 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 04:40:48,955 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 04:40:48,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o1000.c [2023-04-02 04:40:49,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 04:40:50,204 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 04:40:50,204 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c [2023-04-02 04:40:50,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87cb94344/1d5d4f43f6bc4de59b4441d00f3eea61/FLAGd8436b758 [2023-04-02 04:40:50,222 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87cb94344/1d5d4f43f6bc4de59b4441d00f3eea61 [2023-04-02 04:40:50,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 04:40:50,226 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 04:40:50,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 04:40:50,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 04:40:50,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 04:40:50,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53add4ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50, skipping insertion in model container [2023-04-02 04:40:50,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 04:40:50,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 04:40:50,347 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/id_o1000.c[520,533] [2023-04-02 04:40:50,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:40:50,357 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 04:40:50,365 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/id_o1000.c[520,533] [2023-04-02 04:40:50,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:40:50,375 INFO L208 MainTranslator]: Completed translation [2023-04-02 04:40:50,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50 WrapperNode [2023-04-02 04:40:50,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 04:40:50,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 04:40:50,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 04:40:50,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 04:40:50,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,391 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 04:40:50,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 04:40:50,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 04:40:50,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 04:40:50,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (1/1) ... [2023-04-02 04:40:50,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:40:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:40:50,414 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 04:40:50,432 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 04:40:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 04:40:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 04:40:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 04:40:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-04-02 04:40:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 04:40:50,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 04:40:50,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 04:40:50,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 04:40:50,507 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 04:40:50,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 04:40:50,623 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 04:40:50,627 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 04:40:50,627 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 04:40:50,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:40:50 BoogieIcfgContainer [2023-04-02 04:40:50,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 04:40:50,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 04:40:50,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 04:40:50,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 04:40:50,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:40:50" (1/3) ... [2023-04-02 04:40:50,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7983ba0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:40:50, skipping insertion in model container [2023-04-02 04:40:50,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:40:50" (2/3) ... [2023-04-02 04:40:50,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7983ba0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:40:50, skipping insertion in model container [2023-04-02 04:40:50,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:40:50" (3/3) ... [2023-04-02 04:40:50,634 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2023-04-02 04:40:50,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 04:40:50,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 04:40:50,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 04:40:50,732 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;@40bd5f10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 04:40:50,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 04:40:50,735 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 04:40:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 04:40:50,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:40:50,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:40:50,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:40:50,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:40:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1485823320, now seen corresponding path program 1 times [2023-04-02 04:40:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:40:50,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681052134] [2023-04-02 04:40:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:40:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:40:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:40:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,067 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 04:40:51,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:40:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681052134] [2023-04-02 04:40:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681052134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 04:40:51,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 04:40:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 04:40:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480247836] [2023-04-02 04:40:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 04:40:51,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 04:40:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:40:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 04:40:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 04:40:51,113 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, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 04:40:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:40:51,232 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-04-02 04:40:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 04:40:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 04:40:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:40:51,239 INFO L225 Difference]: With dead ends: 33 [2023-04-02 04:40:51,240 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 04:40:51,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 04:40:51,244 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:40:51,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:40:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 04:40:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 04:40:51,273 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 04:40:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 04:40:51,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2023-04-02 04:40:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:40:51,277 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 04:40:51,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 04:40:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 04:40:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 04:40:51,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:40:51,280 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 04:40:51,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 04:40:51,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:40:51,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:40:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -843542598, now seen corresponding path program 1 times [2023-04-02 04:40:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:40:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659361350] [2023-04-02 04:40:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:40:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:40:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:40:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,680 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 04:40:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:40:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659361350] [2023-04-02 04:40:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659361350] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:40:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211213448] [2023-04-02 04:40:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:40:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:40:51,686 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 04:40:51,688 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 04:40:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:51,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 04:40:51,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:40:51,853 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 04:40:51,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:40:51,961 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 04:40:51,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211213448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:40:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:40:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-02 04:40:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007532179] [2023-04-02 04:40:51,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:40:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 04:40:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:40:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 04:40:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-02 04:40:51,965 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 04:40:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:40:52,172 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-02 04:40:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 04:40:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 20 [2023-04-02 04:40:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:40:52,174 INFO L225 Difference]: With dead ends: 31 [2023-04-02 04:40:52,174 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 04:40:52,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-04-02 04:40:52,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:40:52,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:40:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 04:40:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 04:40:52,181 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 04:40:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 04:40:52,182 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2023-04-02 04:40:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:40:52,183 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 04:40:52,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 04:40:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 04:40:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 04:40:52,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:40:52,184 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 04:40:52,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 04:40:52,389 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 04:40:52,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:40:52,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:40:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1630248954, now seen corresponding path program 2 times [2023-04-02 04:40:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:40:52,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637270557] [2023-04-02 04:40:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:40:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:40:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:40:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:52,738 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 04:40:52,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:40:52,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637270557] [2023-04-02 04:40:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637270557] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:40:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521914944] [2023-04-02 04:40:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:40:52,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:40:52,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:40:52,758 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 04:40:52,759 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 04:40:52,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:40:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:40:52,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 04:40:52,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:40:52,940 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 04:40:52,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:40:53,198 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 04:40:53,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521914944] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:40:53,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:40:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2023-04-02 04:40:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832008616] [2023-04-02 04:40:53,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:40:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 04:40:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:40:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 04:40:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-02 04:40:53,203 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-02 04:40:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:40:53,641 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-04-02 04:40:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 04:40:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 32 [2023-04-02 04:40:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:40:53,642 INFO L225 Difference]: With dead ends: 43 [2023-04-02 04:40:53,642 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 04:40:53,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 04:40:53,643 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:40:53,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 62 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:40:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 04:40:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 04:40:53,649 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 04:40:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-04-02 04:40:53,650 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2023-04-02 04:40:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:40:53,650 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-04-02 04:40:53,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-04-02 04:40:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-04-02 04:40:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 04:40:53,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:40:53,655 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 04:40:53,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 04:40:53,860 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 04:40:53,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:40:53,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:40:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -710250374, now seen corresponding path program 3 times [2023-04-02 04:40:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:40:53,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106690151] [2023-04-02 04:40:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:53,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:40:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:53,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:40:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:40:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:54,425 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 04:40:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:40:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106690151] [2023-04-02 04:40:54,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106690151] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:40:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193190297] [2023-04-02 04:40:54,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:40:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:40:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:40:54,435 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 04:40:54,465 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 04:40:54,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-02 04:40:54,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:40:54,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 04:40:54,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:40:54,635 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 04:40:54,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:40:55,327 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 04:40:55,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193190297] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:40:55,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:40:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2023-04-02 04:40:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514934496] [2023-04-02 04:40:55,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:40:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-02 04:40:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:40:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-02 04:40:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 04:40:55,330 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (5), 2 states have call predecessors, (5), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2023-04-02 04:40:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:40:58,956 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2023-04-02 04:40:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 04:40:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (5), 2 states have call predecessors, (5), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 56 [2023-04-02 04:40:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:40:58,958 INFO L225 Difference]: With dead ends: 67 [2023-04-02 04:40:58,958 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 04:40:58,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=629, Invalid=4341, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 04:40:58,961 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 04:40:58,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 92 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 04:40:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 04:40:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-04-02 04:40:58,968 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 04:40:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-02 04:40:58,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2023-04-02 04:40:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:40:58,969 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-02 04:40:58,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 21 states have internal predecessors, (45), 1 states have call successors, (5), 2 states have call predecessors, (5), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2023-04-02 04:40:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-02 04:40:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 04:40:58,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:40:58,971 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 04:40:58,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 04:40:59,184 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 04:40:59,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:40:59,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:40:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1933913734, now seen corresponding path program 4 times [2023-04-02 04:40:59,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:40:59,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167135239] [2023-04-02 04:40:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:40:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:40:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:40:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:40:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:40:59,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:40:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:41:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:41:00,887 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 04:41:00,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:41:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167135239] [2023-04-02 04:41:00,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167135239] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:41:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952735584] [2023-04-02 04:41:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:41:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:41:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:41:00,901 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 04:41:00,940 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 04:41:00,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:41:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:41:00,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 68 conjunts are in the unsatisfiable core [2023-04-02 04:41:00,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:41:01,166 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 04:41:01,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:41:03,441 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 04:41:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952735584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:41:03,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:41:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2023-04-02 04:41:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241387361] [2023-04-02 04:41:03,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:41:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-04-02 04:41:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:41:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-04-02 04:41:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=4208, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 04:41:03,445 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 70 states, 70 states have (on average 1.1) internal successors, (77), 37 states have internal predecessors, (77), 1 states have call successors, (5), 2 states have call predecessors, (5), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) [2023-04-02 04:41:24,449 WARN L223 SmtUtils]: Spent 12.72s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:41:46,408 WARN L223 SmtUtils]: Spent 17.14s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:42:08,924 WARN L223 SmtUtils]: Spent 16.49s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:42:21,505 WARN L223 SmtUtils]: Spent 9.39s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:42:32,563 WARN L223 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:42:45,322 WARN L223 SmtUtils]: Spent 10.30s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:42:54,729 WARN L223 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:43:08,027 WARN L223 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 04:43:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:43:43,297 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2023-04-02 04:43:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-04-02 04:43:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1) internal successors, (77), 37 states have internal predecessors, (77), 1 states have call successors, (5), 2 states have call predecessors, (5), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) Word has length 104 [2023-04-02 04:43:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:43:43,300 INFO L225 Difference]: With dead ends: 115 [2023-04-02 04:43:43,300 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 04:43:43,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 160.6s TimeCoverageRelationStatistics Valid=2253, Invalid=15837, Unknown=0, NotChecked=0, Total=18090 [2023-04-02 04:43:43,308 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:43:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 177 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1997 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 04:43:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 04:43:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-02 04:43:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 33 states have return successors, (34), 33 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-02 04:43:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-04-02 04:43:43,317 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2023-04-02 04:43:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:43:43,317 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-04-02 04:43:43,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1) internal successors, (77), 37 states have internal predecessors, (77), 1 states have call successors, (5), 2 states have call predecessors, (5), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) [2023-04-02 04:43:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-04-02 04:43:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-02 04:43:43,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:43:43,322 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:43:43,329 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 04:43:43,527 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 04:43:43,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:43:43,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:43:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2024182650, now seen corresponding path program 5 times [2023-04-02 04:43:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:43:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269296559] [2023-04-02 04:43:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:43:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:43:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:43:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 04:43:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:44,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:44,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:45,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:46,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:46,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:43:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:43:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-04-02 04:43:50,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:43:50,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269296559] [2023-04-02 04:43:50,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269296559] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:43:50,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775262430] [2023-04-02 04:43:50,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:43:50,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:43:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:43:50,387 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 04:43:50,389 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 04:44:23,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-04-02 04:44:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:44:23,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 132 conjunts are in the unsatisfiable core [2023-04-02 04:44:23,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:44:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-04-02 04:44:23,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:44:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-04-02 04:44:32,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775262430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:44:32,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:44:32,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2023-04-02 04:44:32,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977206692] [2023-04-02 04:44:32,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:44:32,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-04-02 04:44:32,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:44:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-04-02 04:44:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2254, Invalid=15568, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 04:44:32,170 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 134 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 69 states have internal predecessors, (141), 1 states have call successors, (5), 2 states have call predecessors, (5), 65 states have return successors, (65), 65 states have call predecessors, (65), 1 states have call successors, (65)