/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:41:55,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:41:55,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:41:55,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:41:56,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:41:56,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:41:56,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:41:56,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:41:56,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:41:56,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:41:56,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:41:56,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:41:56,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:41:56,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:41:56,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:41:56,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:41:56,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:41:56,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:41:56,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:41:56,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:41:56,055 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 01:41:56,082 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:41:56,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:41:56,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:41:56,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:41:56,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:41:56,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:41:56,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:41:56,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:41:56,085 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:41:56,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:41:56,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:41:56,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:41:56,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:41:56,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:41:56,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:41:56,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:41:56,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:41:56,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:56,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:41:56,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:41:56,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:41:56,089 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:41:56,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:41:56,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:41:56,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:41:56,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:41:56,312 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:41:56,312 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:41:56,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-04-02 01:41:57,469 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:41:57,628 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:41:57,628 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-04-02 01:41:57,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba2bfd56/3b16831b27184decbd1606b9040ae117/FLAG3d0ecc6fd [2023-04-02 01:41:57,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba2bfd56/3b16831b27184decbd1606b9040ae117 [2023-04-02 01:41:57,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:41:57,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:41:57,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:57,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:41:57,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:41:57,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eec89f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57, skipping insertion in model container [2023-04-02 01:41:57,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:41:57,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:41:57,806 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/loops-crafted-1/theatreSquare.c[370,383] [2023-04-02 01:41:57,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:57,849 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:41:57,859 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/loops-crafted-1/theatreSquare.c[370,383] [2023-04-02 01:41:57,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:57,878 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:41:57,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57 WrapperNode [2023-04-02 01:41:57,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:57,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:41:57,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:41:57,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:41:57,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:41:57,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:41:57,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:41:57,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:41:57,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (1/1) ... [2023-04-02 01:41:57,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:57,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:57,952 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 01:41:57,954 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 01:41:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:41:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:41:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:41:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:41:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2023-04-02 01:41:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2023-04-02 01:41:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:41:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:41:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:41:58,049 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:41:58,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:41:58,330 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:41:58,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:41:58,335 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-02 01:41:58,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:58 BoogieIcfgContainer [2023-04-02 01:41:58,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:41:58,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:41:58,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:41:58,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:41:58,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:41:57" (1/3) ... [2023-04-02 01:41:58,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09b9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:58, skipping insertion in model container [2023-04-02 01:41:58,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:57" (2/3) ... [2023-04-02 01:41:58,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09b9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:58, skipping insertion in model container [2023-04-02 01:41:58,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:58" (3/3) ... [2023-04-02 01:41:58,359 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2023-04-02 01:41:58,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:41:58,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:41:58,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:41:58,438 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;@3c6318c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:41:58,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:41:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 01:41:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:41:58,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:58,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:58,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:58,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1554304209, now seen corresponding path program 1 times [2023-04-02 01:41:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:58,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965462134] [2023-04-02 01:41:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:58,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:58,697 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 01:41:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965462134] [2023-04-02 01:41:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965462134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:41:58,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:41:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:41:58,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038004038] [2023-04-02 01:41:58,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:41:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:41:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:41:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:41:58,737 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:58,958 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2023-04-02 01:41:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:41:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 01:41:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:58,967 INFO L225 Difference]: With dead ends: 76 [2023-04-02 01:41:58,967 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 01:41:58,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:41:58,972 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:58,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 28 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:41:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 01:41:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 01:41:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-02 01:41:59,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2023-04-02 01:41:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:59,002 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-02 01:41:59,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-02 01:41:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 01:41:59,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:59,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:59,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:41:59,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:59,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 362112746, now seen corresponding path program 1 times [2023-04-02 01:41:59,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:59,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172718984] [2023-04-02 01:41:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:41:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:41:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,401 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 01:41:59,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172718984] [2023-04-02 01:41:59,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172718984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:41:59,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:41:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-02 01:41:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963655403] [2023-04-02 01:41:59,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:41:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:41:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:41:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:41:59,419 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:41:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:59,769 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-04-02 01:41:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:41:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-04-02 01:41:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:59,772 INFO L225 Difference]: With dead ends: 50 [2023-04-02 01:41:59,772 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:41:59,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-02 01:41:59,774 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:59,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:41:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:41:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-04-02 01:41:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:41:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-04-02 01:41:59,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2023-04-02 01:41:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:59,788 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-04-02 01:41:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:41:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-04-02 01:41:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 01:41:59,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:59,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:59,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:41:59,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:59,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash -310269904, now seen corresponding path program 1 times [2023-04-02 01:41:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169557592] [2023-04-02 01:41:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:41:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:41:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169557592] [2023-04-02 01:41:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169557592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:41:59,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:41:59,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:41:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619836780] [2023-04-02 01:41:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:41:59,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:41:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:41:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:41:59,866 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:41:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:59,967 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-04-02 01:41:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:41:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-04-02 01:41:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:59,969 INFO L225 Difference]: With dead ends: 59 [2023-04-02 01:41:59,969 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 01:41:59,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:41:59,971 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:59,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:41:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 01:41:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-04-02 01:41:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:41:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-04-02 01:41:59,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 32 [2023-04-02 01:41:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:59,982 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-04-02 01:41:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:41:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-04-02 01:41:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 01:41:59,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:59,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:59,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:41:59,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:59,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1053423629, now seen corresponding path program 1 times [2023-04-02 01:41:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:59,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056441885] [2023-04-02 01:41:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:59,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-02 01:42:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:00,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056441885] [2023-04-02 01:42:00,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056441885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:42:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088151390] [2023-04-02 01:42:00,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:42:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:42:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:42:00,058 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:00,166 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-04-02 01:42:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-04-02 01:42:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:00,169 INFO L225 Difference]: With dead ends: 81 [2023-04-02 01:42:00,169 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 01:42:00,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:42:00,178 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:00,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 01:42:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-04-02 01:42:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-04-02 01:42:00,192 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 32 [2023-04-02 01:42:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:00,192 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-04-02 01:42:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-04-02 01:42:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:42:00,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:00,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:42:00,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:00,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash 755216986, now seen corresponding path program 1 times [2023-04-02 01:42:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:00,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851647311] [2023-04-02 01:42:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:42:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:00,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851647311] [2023-04-02 01:42:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851647311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869868678] [2023-04-02 01:42:00,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:00,343 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:00,458 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2023-04-02 01:42:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-04-02 01:42:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:00,460 INFO L225 Difference]: With dead ends: 77 [2023-04-02 01:42:00,461 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 01:42:00,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:00,462 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:00,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 01:42:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 01:42:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-04-02 01:42:00,478 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 33 [2023-04-02 01:42:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:00,478 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-04-02 01:42:00,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-04-02 01:42:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:42:00,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:00,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 01:42:00,485 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1803948538, now seen corresponding path program 1 times [2023-04-02 01:42:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271817158] [2023-04-02 01:42:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-02 01:42:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:00,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271817158] [2023-04-02 01:42:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271817158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862846789] [2023-04-02 01:42:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:00,591 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:00,708 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2023-04-02 01:42:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-04-02 01:42:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:00,709 INFO L225 Difference]: With dead ends: 83 [2023-04-02 01:42:00,709 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 01:42:00,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:00,710 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:00,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 22 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 01:42:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-04-02 01:42:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-04-02 01:42:00,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2023-04-02 01:42:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:00,718 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-04-02 01:42:00,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-04-02 01:42:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 01:42:00,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:00,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:00,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 01:42:00,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:00,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1563500484, now seen corresponding path program 1 times [2023-04-02 01:42:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267927389] [2023-04-02 01:42:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:42:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267927389] [2023-04-02 01:42:00,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267927389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:00,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778228283] [2023-04-02 01:42:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:00,796 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:00,889 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-04-02 01:42:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-04-02 01:42:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:00,891 INFO L225 Difference]: With dead ends: 57 [2023-04-02 01:42:00,891 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 01:42:00,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:00,892 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:00,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 01:42:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-02 01:42:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-04-02 01:42:00,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 34 [2023-04-02 01:42:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:00,908 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-04-02 01:42:00,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-04-02 01:42:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 01:42:00,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:00,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 01:42:00,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:00,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948107, now seen corresponding path program 1 times [2023-04-02 01:42:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:00,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688679782] [2023-04-02 01:42:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-02 01:42:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:42:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688679782] [2023-04-02 01:42:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688679782] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294669394] [2023-04-02 01:42:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:00,999 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:01,086 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2023-04-02 01:42:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:01,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-04-02 01:42:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:01,089 INFO L225 Difference]: With dead ends: 64 [2023-04-02 01:42:01,089 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 01:42:01,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:01,090 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:01,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 01:42:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-04-02 01:42:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-04-02 01:42:01,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 35 [2023-04-02 01:42:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:01,096 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-04-02 01:42:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-04-02 01:42:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 01:42:01,097 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:01,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 01:42:01,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:01,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2078941294, now seen corresponding path program 1 times [2023-04-02 01:42:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142454851] [2023-04-02 01:42:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:42:01,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:01,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142454851] [2023-04-02 01:42:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142454851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:01,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:01,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 01:42:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351866970] [2023-04-02 01:42:01,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:01,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 01:42:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 01:42:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:42:01,168 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:01,275 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-04-02 01:42:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:42:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-04-02 01:42:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:01,277 INFO L225 Difference]: With dead ends: 46 [2023-04-02 01:42:01,277 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 01:42:01,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:42:01,278 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:01,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 01:42:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 01:42:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-04-02 01:42:01,283 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2023-04-02 01:42:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:01,283 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-04-02 01:42:01,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-04-02 01:42:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 01:42:01,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:01,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:01,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 01:42:01,284 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:01,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:01,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1371807532, now seen corresponding path program 1 times [2023-04-02 01:42:01,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:01,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822627445] [2023-04-02 01:42:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 01:42:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:01,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822627445] [2023-04-02 01:42:01,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822627445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:01,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:01,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094682621] [2023-04-02 01:42:01,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:01,375 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:01,468 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-04-02 01:42:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-04-02 01:42:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:01,469 INFO L225 Difference]: With dead ends: 50 [2023-04-02 01:42:01,469 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 01:42:01,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:01,470 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:01,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 01:42:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 01:42:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:42:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-04-02 01:42:01,480 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2023-04-02 01:42:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:01,480 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-04-02 01:42:01,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-04-02 01:42:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 01:42:01,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:01,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:01,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 01:42:01,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:01,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1443111891, now seen corresponding path program 1 times [2023-04-02 01:42:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766363629] [2023-04-02 01:42:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:01,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:01,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:01,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766363629] [2023-04-02 01:42:01,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766363629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:01,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377112382] [2023-04-02 01:42:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:01,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:01,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:01,904 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 01:42:01,916 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 01:42:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:01,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 01:42:01,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:02,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377112382] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:02,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 25 [2023-04-02 01:42:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712161735] [2023-04-02 01:42:02,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 01:42:02,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 01:42:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2023-04-02 01:42:02,464 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:03,078 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-04-02 01:42:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 01:42:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-04-02 01:42:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:03,079 INFO L225 Difference]: With dead ends: 70 [2023-04-02 01:42:03,079 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:42:03,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 01:42:03,081 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:03,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 102 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:42:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:42:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2023-04-02 01:42:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-04-02 01:42:03,089 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 37 [2023-04-02 01:42:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:03,089 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-04-02 01:42:03,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-04-02 01:42:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 01:42:03,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:03,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:03,098 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 01:42:03,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 01:42:03,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:03,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -437658803, now seen corresponding path program 2 times [2023-04-02 01:42:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92404288] [2023-04-02 01:42:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:03,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:03,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92404288] [2023-04-02 01:42:03,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92404288] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:03,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178341945] [2023-04-02 01:42:03,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:03,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:03,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:03,388 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 01:42:03,391 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 01:42:03,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:03,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:03,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:42:03,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:03,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178341945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:03,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:03,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-04-02 01:42:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349728990] [2023-04-02 01:42:03,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:42:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:42:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:03,522 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:03,674 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2023-04-02 01:42:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:42:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-04-02 01:42:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:03,675 INFO L225 Difference]: With dead ends: 80 [2023-04-02 01:42:03,675 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 01:42:03,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:42:03,676 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:03,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 01:42:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-04-02 01:42:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 01:42:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-04-02 01:42:03,686 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 38 [2023-04-02 01:42:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-04-02 01:42:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-04-02 01:42:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 01:42:03,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:03,687 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:03,697 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 01:42:03,893 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,SelfDestructingSolverStorable11 [2023-04-02 01:42:03,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:03,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1488699212, now seen corresponding path program 3 times [2023-04-02 01:42:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:03,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837369471] [2023-04-02 01:42:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:04,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837369471] [2023-04-02 01:42:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837369471] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220290668] [2023-04-02 01:42:04,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:04,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:04,177 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 01:42:04,202 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 01:42:04,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 01:42:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:04,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:42:04,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:04,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220290668] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:04,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-04-02 01:42:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511392593] [2023-04-02 01:42:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:42:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:42:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:42:04,557 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:04,876 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2023-04-02 01:42:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:42:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-04-02 01:42:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:04,878 INFO L225 Difference]: With dead ends: 82 [2023-04-02 01:42:04,878 INFO L226 Difference]: Without dead ends: 76 [2023-04-02 01:42:04,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:42:04,879 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:04,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 52 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:42:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-02 01:42:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-04-02 01:42:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 01:42:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-04-02 01:42:04,889 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 38 [2023-04-02 01:42:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:04,890 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-04-02 01:42:04,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-04-02 01:42:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 01:42:04,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:04,891 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:04,899 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 01:42:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:05,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:05,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1229776654, now seen corresponding path program 4 times [2023-04-02 01:42:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:05,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467366142] [2023-04-02 01:42:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:42:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:05,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467366142] [2023-04-02 01:42:05,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467366142] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:05,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001437680] [2023-04-02 01:42:05,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:05,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:05,172 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 01:42:05,175 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 01:42:05,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:05,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:42:05,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:05,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001437680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:05,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:05,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-04-02 01:42:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006534417] [2023-04-02 01:42:05,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:05,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:42:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:42:05,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:05,279 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:05,432 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2023-04-02 01:42:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:42:05,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-04-02 01:42:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:05,433 INFO L225 Difference]: With dead ends: 140 [2023-04-02 01:42:05,433 INFO L226 Difference]: Without dead ends: 90 [2023-04-02 01:42:05,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:42:05,434 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:05,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 22 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-02 01:42:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-04-02 01:42:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-02 01:42:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-04-02 01:42:05,462 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 38 [2023-04-02 01:42:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:05,462 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-04-02 01:42:05,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-04-02 01:42:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 01:42:05,463 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:05,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:05,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:05,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:05,664 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:05,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1473231215, now seen corresponding path program 5 times [2023-04-02 01:42:05,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:05,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018076254] [2023-04-02 01:42:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:05,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:42:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018076254] [2023-04-02 01:42:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018076254] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332903831] [2023-04-02 01:42:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:05,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:05,857 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 01:42:05,865 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 01:42:05,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:05,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:05,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:42:05,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:06,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332903831] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:06,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:06,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-04-02 01:42:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386829763] [2023-04-02 01:42:06,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:42:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:42:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:42:06,227 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:06,601 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2023-04-02 01:42:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:42:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-04-02 01:42:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:06,602 INFO L225 Difference]: With dead ends: 92 [2023-04-02 01:42:06,602 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 01:42:06,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:42:06,605 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:06,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 57 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:42:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 01:42:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-04-02 01:42:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 73 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 01:42:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2023-04-02 01:42:06,618 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 38 [2023-04-02 01:42:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:06,618 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2023-04-02 01:42:06,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2023-04-02 01:42:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 01:42:06,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:06,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:06,627 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 01:42:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 01:42:06,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:06,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1109766783, now seen corresponding path program 6 times [2023-04-02 01:42:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543802917] [2023-04-02 01:42:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:06,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:42:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:07,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543802917] [2023-04-02 01:42:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543802917] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739362493] [2023-04-02 01:42:07,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:42:07,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:07,101 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 01:42:07,103 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 01:42:07,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-04-02 01:42:07,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:07,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:42:07,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:07,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:07,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739362493] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:07,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:07,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2023-04-02 01:42:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231031080] [2023-04-02 01:42:07,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:42:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:42:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:42:07,487 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:07,815 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2023-04-02 01:42:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:42:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-04-02 01:42:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:07,816 INFO L225 Difference]: With dead ends: 108 [2023-04-02 01:42:07,816 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 01:42:07,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:07,817 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:07,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 47 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:42:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 01:42:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2023-04-02 01:42:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 01:42:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2023-04-02 01:42:07,829 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 39 [2023-04-02 01:42:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:07,829 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2023-04-02 01:42:07,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2023-04-02 01:42:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 01:42:07,830 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:07,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:07,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 01:42:08,036 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:08,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1701022282, now seen corresponding path program 7 times [2023-04-02 01:42:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063845145] [2023-04-02 01:42:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:42:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:08,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063845145] [2023-04-02 01:42:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063845145] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156214503] [2023-04-02 01:42:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:42:08,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:08,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:08,412 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 01:42:08,414 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 01:42:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 01:42:08,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:08,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156214503] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:08,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:08,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 27 [2023-04-02 01:42:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211769083] [2023-04-02 01:42:08,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:08,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 01:42:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 01:42:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:42:08,915 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:09,713 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2023-04-02 01:42:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 01:42:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-04-02 01:42:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:09,714 INFO L225 Difference]: With dead ends: 137 [2023-04-02 01:42:09,714 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 01:42:09,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 01:42:09,716 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 99 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:09,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 122 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:42:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 01:42:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2023-04-02 01:42:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 107 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2023-04-02 01:42:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2023-04-02 01:42:09,732 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 39 [2023-04-02 01:42:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:09,734 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2023-04-02 01:42:09,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.625) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2023-04-02 01:42:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 01:42:09,735 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:09,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:09,743 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 01:42:09,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:09,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:09,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1844910907, now seen corresponding path program 8 times [2023-04-02 01:42:09,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:09,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115108838] [2023-04-02 01:42:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:09,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:10,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:10,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115108838] [2023-04-02 01:42:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115108838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110195898] [2023-04-02 01:42:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:10,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:10,179 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 01:42:10,182 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 01:42:10,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:10,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:42:10,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:10,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110195898] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:10,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:10,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2023-04-02 01:42:10,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35913079] [2023-04-02 01:42:10,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:10,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:42:10,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:42:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:42:10,524 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:10,914 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2023-04-02 01:42:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:42:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-04-02 01:42:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:10,915 INFO L225 Difference]: With dead ends: 132 [2023-04-02 01:42:10,915 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 01:42:10,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:10,916 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:10,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 67 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:42:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 01:42:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2023-04-02 01:42:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 104 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-04-02 01:42:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2023-04-02 01:42:10,934 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 39 [2023-04-02 01:42:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:10,934 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2023-04-02 01:42:10,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2023-04-02 01:42:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:42:10,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:10,935 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:10,946 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 01:42:11,146 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,SelfDestructingSolverStorable17 [2023-04-02 01:42:11,146 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:11,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash 172610767, now seen corresponding path program 9 times [2023-04-02 01:42:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:11,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454821612] [2023-04-02 01:42:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:11,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:42:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454821612] [2023-04-02 01:42:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454821612] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660671523] [2023-04-02 01:42:11,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:11,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:11,413 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 01:42:11,415 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 01:42:11,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 01:42:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:11,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:42:11,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:11,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:11,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660671523] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:11,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:11,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2023-04-02 01:42:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468763310] [2023-04-02 01:42:11,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 01:42:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 01:42:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-02 01:42:11,972 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:12,588 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2023-04-02 01:42:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:42:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-04-02 01:42:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:12,590 INFO L225 Difference]: With dead ends: 136 [2023-04-02 01:42:12,590 INFO L226 Difference]: Without dead ends: 122 [2023-04-02 01:42:12,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:42:12,591 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 146 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:12,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 57 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:42:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-02 01:42:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2023-04-02 01:42:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-04-02 01:42:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2023-04-02 01:42:12,618 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 40 [2023-04-02 01:42:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:12,619 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2023-04-02 01:42:12,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2023-04-02 01:42:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:42:12,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:12,621 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:12,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:12,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:12,827 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:12,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -306897140, now seen corresponding path program 10 times [2023-04-02 01:42:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:12,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354544523] [2023-04-02 01:42:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:12,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:12,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:13,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354544523] [2023-04-02 01:42:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354544523] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917567121] [2023-04-02 01:42:13,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:13,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:13,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:13,062 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 01:42:13,065 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 01:42:13,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:13,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:42:13,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:13,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917567121] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:13,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:13,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2023-04-02 01:42:13,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427315924] [2023-04-02 01:42:13,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 01:42:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 01:42:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-02 01:42:13,554 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:14,176 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2023-04-02 01:42:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:42:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-04-02 01:42:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:14,177 INFO L225 Difference]: With dead ends: 128 [2023-04-02 01:42:14,178 INFO L226 Difference]: Without dead ends: 116 [2023-04-02 01:42:14,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:42:14,179 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 132 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:14,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 67 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:42:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-02 01:42:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2023-04-02 01:42:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 100 states have internal predecessors, (112), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-02 01:42:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2023-04-02 01:42:14,197 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 40 [2023-04-02 01:42:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:14,198 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2023-04-02 01:42:14,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2023-04-02 01:42:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:42:14,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:14,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:14,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:14,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:14,404 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:14,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1295907854, now seen corresponding path program 11 times [2023-04-02 01:42:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:14,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840938403] [2023-04-02 01:42:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:14,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:14,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:42:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840938403] [2023-04-02 01:42:14,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840938403] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439161579] [2023-04-02 01:42:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:14,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:14,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:14,497 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 01:42:14,500 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 01:42:14,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:14,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:42:14,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:14,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439161579] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:14,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2023-04-02 01:42:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123650940] [2023-04-02 01:42:14,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:42:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:42:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:42:14,631 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:14,772 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2023-04-02 01:42:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:42:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-04-02 01:42:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:14,773 INFO L225 Difference]: With dead ends: 170 [2023-04-02 01:42:14,773 INFO L226 Difference]: Without dead ends: 105 [2023-04-02 01:42:14,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:42:14,774 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:14,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-02 01:42:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2023-04-02 01:42:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 85 states have internal predecessors, (97), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 01:42:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2023-04-02 01:42:14,793 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 40 [2023-04-02 01:42:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:14,793 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2023-04-02 01:42:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2023-04-02 01:42:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 01:42:14,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:14,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:14,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:15,000 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,SelfDestructingSolverStorable20 [2023-04-02 01:42:15,000 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:15,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1335621997, now seen corresponding path program 12 times [2023-04-02 01:42:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:15,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388740568] [2023-04-02 01:42:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:15,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388740568] [2023-04-02 01:42:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388740568] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042659568] [2023-04-02 01:42:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:42:15,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:15,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:15,081 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 01:42:15,084 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 01:42:15,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-04-02 01:42:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:15,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 01:42:15,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:15,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:15,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042659568] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:15,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:15,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2023-04-02 01:42:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672994714] [2023-04-02 01:42:15,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:15,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:42:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:42:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:42:15,206 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:15,334 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2023-04-02 01:42:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:42:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-04-02 01:42:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:15,336 INFO L225 Difference]: With dead ends: 115 [2023-04-02 01:42:15,336 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 01:42:15,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:42:15,337 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:15,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 01:42:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-04-02 01:42:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 88 states have internal predecessors, (100), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 01:42:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2023-04-02 01:42:15,357 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 40 [2023-04-02 01:42:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:15,357 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2023-04-02 01:42:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2023-04-02 01:42:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:42:15,358 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:15,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:15,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:15,563 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,SelfDestructingSolverStorable21 [2023-04-02 01:42:15,563 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:15,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1943349171, now seen corresponding path program 13 times [2023-04-02 01:42:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967182381] [2023-04-02 01:42:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:15,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967182381] [2023-04-02 01:42:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967182381] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275924237] [2023-04-02 01:42:15,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:42:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:15,988 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 01:42:15,990 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 01:42:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:16,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 01:42:16,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:16,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275924237] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:16,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 29 [2023-04-02 01:42:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134102255] [2023-04-02 01:42:16,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:16,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 01:42:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 01:42:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:16,481 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:17,402 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2023-04-02 01:42:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:42:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-04-02 01:42:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:17,404 INFO L225 Difference]: With dead ends: 140 [2023-04-02 01:42:17,404 INFO L226 Difference]: Without dead ends: 134 [2023-04-02 01:42:17,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 01:42:17,405 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:17,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 112 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-02 01:42:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2023-04-02 01:42:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-02 01:42:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2023-04-02 01:42:17,432 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 41 [2023-04-02 01:42:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:17,432 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2023-04-02 01:42:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2023-04-02 01:42:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:42:17,433 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:17,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:17,444 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 01:42:17,641 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,SelfDestructingSolverStorable22 [2023-04-02 01:42:17,642 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:17,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -196254195, now seen corresponding path program 14 times [2023-04-02 01:42:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266108585] [2023-04-02 01:42:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:17,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:17,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:17,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266108585] [2023-04-02 01:42:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266108585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:17,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123812091] [2023-04-02 01:42:17,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:17,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:17,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:17,986 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 01:42:17,990 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 01:42:18,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:18,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 01:42:18,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:18,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123812091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:18,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2023-04-02 01:42:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110325529] [2023-04-02 01:42:18,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 01:42:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 01:42:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:18,527 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:19,241 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2023-04-02 01:42:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 01:42:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-04-02 01:42:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:19,242 INFO L225 Difference]: With dead ends: 134 [2023-04-02 01:42:19,242 INFO L226 Difference]: Without dead ends: 128 [2023-04-02 01:42:19,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 01:42:19,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:19,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:42:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-02 01:42:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2023-04-02 01:42:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 112 states have internal predecessors, (124), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-02 01:42:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2023-04-02 01:42:19,275 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 41 [2023-04-02 01:42:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:19,275 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2023-04-02 01:42:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2023-04-02 01:42:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 01:42:19,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:19,277 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:19,287 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 01:42:19,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:19,482 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:19,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1133754580, now seen corresponding path program 15 times [2023-04-02 01:42:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111755736] [2023-04-02 01:42:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:19,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:19,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:19,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111755736] [2023-04-02 01:42:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111755736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:19,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83844820] [2023-04-02 01:42:19,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:19,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:19,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:19,773 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 01:42:19,781 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 01:42:19,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 01:42:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:19,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 01:42:19,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:20,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83844820] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:20,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2023-04-02 01:42:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642500799] [2023-04-02 01:42:20,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 01:42:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 01:42:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:42:20,448 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:21,437 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2023-04-02 01:42:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:42:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-04-02 01:42:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:21,439 INFO L225 Difference]: With dead ends: 152 [2023-04-02 01:42:21,439 INFO L226 Difference]: Without dead ends: 138 [2023-04-02 01:42:21,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 01:42:21,441 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 197 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:21,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 102 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-02 01:42:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2023-04-02 01:42:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 115 states have internal predecessors, (129), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-02 01:42:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-04-02 01:42:21,468 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 42 [2023-04-02 01:42:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-04-02 01:42:21,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-04-02 01:42:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 01:42:21,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:21,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:21,484 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 01:42:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:21,681 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:21,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1181369487, now seen corresponding path program 16 times [2023-04-02 01:42:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824024281] [2023-04-02 01:42:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:21,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:21,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824024281] [2023-04-02 01:42:21,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824024281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:21,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664567176] [2023-04-02 01:42:21,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:21,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:21,980 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 01:42:21,983 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 01:42:22,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:22,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:22,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 01:42:22,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:22,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664567176] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:22,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2023-04-02 01:42:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631095209] [2023-04-02 01:42:22,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 01:42:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 01:42:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:42:22,666 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:23,643 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2023-04-02 01:42:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:42:23,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-04-02 01:42:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:23,645 INFO L225 Difference]: With dead ends: 144 [2023-04-02 01:42:23,645 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 01:42:23,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 01:42:23,646 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:23,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 107 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 01:42:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-04-02 01:42:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 116 states have internal predecessors, (130), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 01:42:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2023-04-02 01:42:23,676 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 42 [2023-04-02 01:42:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:23,677 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2023-04-02 01:42:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2023-04-02 01:42:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 01:42:23,678 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:23,678 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:23,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:23,883 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,SelfDestructingSolverStorable25 [2023-04-02 01:42:23,884 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:23,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash -439775891, now seen corresponding path program 17 times [2023-04-02 01:42:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:23,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585612242] [2023-04-02 01:42:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:23,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:23,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:23,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:23,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585612242] [2023-04-02 01:42:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585612242] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573129496] [2023-04-02 01:42:23,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:23,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:23,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:23,975 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 01:42:23,989 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 01:42:24,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 01:42:24,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:24,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:42:24,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:24,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573129496] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:24,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2023-04-02 01:42:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710403912] [2023-04-02 01:42:24,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:42:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:42:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:42:24,134 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:24,346 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2023-04-02 01:42:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:42:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-04-02 01:42:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:24,347 INFO L225 Difference]: With dead ends: 186 [2023-04-02 01:42:24,348 INFO L226 Difference]: Without dead ends: 164 [2023-04-02 01:42:24,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:42:24,349 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:24,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 37 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-04-02 01:42:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2023-04-02 01:42:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.2265625) internal successors, (157), 138 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 01:42:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2023-04-02 01:42:24,386 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 42 [2023-04-02 01:42:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:24,386 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2023-04-02 01:42:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2023-04-02 01:42:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 01:42:24,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:24,387 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:24,392 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 01:42:24,592 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,SelfDestructingSolverStorable26 [2023-04-02 01:42:24,592 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:24,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash -466729134, now seen corresponding path program 18 times [2023-04-02 01:42:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:24,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101624859] [2023-04-02 01:42:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:24,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:24,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:24,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:24,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101624859] [2023-04-02 01:42:24,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101624859] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:24,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689872430] [2023-04-02 01:42:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:42:24,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:24,674 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 01:42:24,676 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 01:42:24,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-04-02 01:42:24,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:24,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:42:24,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:24,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 01:42:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689872430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:24,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2023-04-02 01:42:24,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455028740] [2023-04-02 01:42:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:24,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:42:24,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:42:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:42:24,834 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:25,024 INFO L93 Difference]: Finished difference Result 290 states and 347 transitions. [2023-04-02 01:42:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:42:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-04-02 01:42:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:25,026 INFO L225 Difference]: With dead ends: 290 [2023-04-02 01:42:25,026 INFO L226 Difference]: Without dead ends: 186 [2023-04-02 01:42:25,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:42:25,028 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:25,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-04-02 01:42:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2023-04-02 01:42:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 160 states have internal predecessors, (184), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 01:42:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2023-04-02 01:42:25,072 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 42 [2023-04-02 01:42:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:25,073 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2023-04-02 01:42:25,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2023-04-02 01:42:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:42:25,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:25,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:25,084 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 01:42:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-04-02 01:42:25,279 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:25,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243306, now seen corresponding path program 19 times [2023-04-02 01:42:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882615322] [2023-04-02 01:42:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:25,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:25,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:25,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:25,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:25,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882615322] [2023-04-02 01:42:25,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882615322] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:25,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166174779] [2023-04-02 01:42:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:42:25,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:25,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:25,732 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 01:42:25,749 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 01:42:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:25,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 01:42:25,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:26,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166174779] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:26,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 31 [2023-04-02 01:42:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897671262] [2023-04-02 01:42:26,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 01:42:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 01:42:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:42:26,195 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:27,275 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2023-04-02 01:42:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:42:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-04-02 01:42:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:27,277 INFO L225 Difference]: With dead ends: 224 [2023-04-02 01:42:27,277 INFO L226 Difference]: Without dead ends: 218 [2023-04-02 01:42:27,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 01:42:27,279 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 148 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:27,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 127 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:42:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-04-02 01:42:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2023-04-02 01:42:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 175 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-04-02 01:42:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2023-04-02 01:42:27,326 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 43 [2023-04-02 01:42:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:27,326 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2023-04-02 01:42:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2023-04-02 01:42:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:42:27,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:27,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:27,339 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 01:42:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-04-02 01:42:27,533 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:27,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1453763067, now seen corresponding path program 20 times [2023-04-02 01:42:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:27,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869882049] [2023-04-02 01:42:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:42:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 01:42:27,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869882049] [2023-04-02 01:42:27,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869882049] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716810776] [2023-04-02 01:42:27,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:27,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:27,793 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 01:42:27,814 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 01:42:27,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:27,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:42:27,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:42:27,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:42:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716810776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:28,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:28,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2023-04-02 01:42:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800598105] [2023-04-02 01:42:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 01:42:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 01:42:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:42:28,247 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:28,901 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2023-04-02 01:42:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:42:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-04-02 01:42:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:28,904 INFO L225 Difference]: With dead ends: 230 [2023-04-02 01:42:28,904 INFO L226 Difference]: Without dead ends: 215 [2023-04-02 01:42:28,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:42:28,906 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 171 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:28,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 72 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:42:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-04-02 01:42:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2023-04-02 01:42:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 192 states have internal predecessors, (209), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2023-04-02 01:42:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2023-04-02 01:42:28,967 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2023-04-02 01:42:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:28,967 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2023-04-02 01:42:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2023-04-02 01:42:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:42:28,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:28,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:28,975 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 01:42:29,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:29,175 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:29,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1804610186, now seen corresponding path program 21 times [2023-04-02 01:42:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384239207] [2023-04-02 01:42:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:29,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:29,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:29,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384239207] [2023-04-02 01:42:29,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384239207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:29,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373618175] [2023-04-02 01:42:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:29,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:29,588 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 01:42:29,591 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 01:42:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 01:42:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:29,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 01:42:29,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:30,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:30,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373618175] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:30,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 31 [2023-04-02 01:42:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288294242] [2023-04-02 01:42:30,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 01:42:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 01:42:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:42:30,163 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:30,945 INFO L93 Difference]: Finished difference Result 228 states and 271 transitions. [2023-04-02 01:42:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:42:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-04-02 01:42:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:30,947 INFO L225 Difference]: With dead ends: 228 [2023-04-02 01:42:30,947 INFO L226 Difference]: Without dead ends: 213 [2023-04-02 01:42:30,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 01:42:30,952 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:30,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:42:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-02 01:42:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2023-04-02 01:42:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 190 states have internal predecessors, (208), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2023-04-02 01:42:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2023-04-02 01:42:30,989 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 43 [2023-04-02 01:42:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2023-04-02 01:42:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 25 states have internal predecessors, (43), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2023-04-02 01:42:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:42:30,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:30,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:31,000 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 01:42:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:31,197 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:31,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2095538945, now seen corresponding path program 22 times [2023-04-02 01:42:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272365780] [2023-04-02 01:42:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:31,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 01:42:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272365780] [2023-04-02 01:42:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272365780] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649022441] [2023-04-02 01:42:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:31,465 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 01:42:31,467 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 01:42:31,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:31,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:42:31,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:42:31,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:42:31,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649022441] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:31,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:31,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 27 [2023-04-02 01:42:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675600258] [2023-04-02 01:42:31,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 01:42:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 01:42:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-04-02 01:42:31,988 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:32,602 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2023-04-02 01:42:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:42:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-04-02 01:42:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:32,603 INFO L225 Difference]: With dead ends: 222 [2023-04-02 01:42:32,603 INFO L226 Difference]: Without dead ends: 202 [2023-04-02 01:42:32,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:42:32,605 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 155 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:32,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 87 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:42:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-04-02 01:42:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2023-04-02 01:42:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 182 states have internal predecessors, (198), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-04-02 01:42:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2023-04-02 01:42:32,656 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 43 [2023-04-02 01:42:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:32,656 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2023-04-02 01:42:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2023-04-02 01:42:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 01:42:32,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:32,658 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:32,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-04-02 01:42:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:32,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:32,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1133635601, now seen corresponding path program 23 times [2023-04-02 01:42:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:32,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383264599] [2023-04-02 01:42:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:32,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:33,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383264599] [2023-04-02 01:42:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383264599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:33,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430258132] [2023-04-02 01:42:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:33,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:33,184 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-02 01:42:33,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-02 01:42:33,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:33,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:42:33,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:33,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:33,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430258132] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:33,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:33,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2023-04-02 01:42:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719963334] [2023-04-02 01:42:33,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:42:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:42:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:42:33,940 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:35,156 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2023-04-02 01:42:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:42:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-04-02 01:42:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:35,158 INFO L225 Difference]: With dead ends: 244 [2023-04-02 01:42:35,158 INFO L226 Difference]: Without dead ends: 230 [2023-04-02 01:42:35,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 01:42:35,161 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 271 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:35,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 97 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-02 01:42:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2023-04-02 01:42:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 202 states have internal predecessors, (220), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2023-04-02 01:42:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2023-04-02 01:42:35,224 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 44 [2023-04-02 01:42:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:35,224 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2023-04-02 01:42:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2023-04-02 01:42:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 01:42:35,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:35,226 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:35,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:35,432 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:35,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1915733740, now seen corresponding path program 24 times [2023-04-02 01:42:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682803539] [2023-04-02 01:42:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:35,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:35,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:35,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:35,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:35,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682803539] [2023-04-02 01:42:35,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682803539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:35,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966594266] [2023-04-02 01:42:35,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:42:35,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:35,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:35,721 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:35,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-02 01:42:35,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:42:35,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:35,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:42:35,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:36,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966594266] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:36,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2023-04-02 01:42:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668996886] [2023-04-02 01:42:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:42:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:42:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:42:36,500 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:37,718 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2023-04-02 01:42:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:42:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-04-02 01:42:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:37,720 INFO L225 Difference]: With dead ends: 236 [2023-04-02 01:42:37,720 INFO L226 Difference]: Without dead ends: 224 [2023-04-02 01:42:37,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 01:42:37,722 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 281 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:37,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 92 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-04-02 01:42:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2023-04-02 01:42:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 203 states have internal predecessors, (221), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2023-04-02 01:42:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2023-04-02 01:42:37,788 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 44 [2023-04-02 01:42:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:37,789 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2023-04-02 01:42:37,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2023-04-02 01:42:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 01:42:37,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:37,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:37,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:37,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:37,997 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:37,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1794700818, now seen corresponding path program 25 times [2023-04-02 01:42:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144054473] [2023-04-02 01:42:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-02 01:42:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144054473] [2023-04-02 01:42:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144054473] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26324803] [2023-04-02 01:42:38,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:42:38,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:38,089 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-02 01:42:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:42:38,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:38,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:38,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26324803] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:38,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:38,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2023-04-02 01:42:38,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298968339] [2023-04-02 01:42:38,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:42:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:42:38,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:42:38,249 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:38,476 INFO L93 Difference]: Finished difference Result 339 states and 391 transitions. [2023-04-02 01:42:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:42:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2023-04-02 01:42:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:38,478 INFO L225 Difference]: With dead ends: 339 [2023-04-02 01:42:38,478 INFO L226 Difference]: Without dead ends: 215 [2023-04-02 01:42:38,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:42:38,479 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:38,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 22 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-04-02 01:42:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2023-04-02 01:42:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 190 states have internal predecessors, (208), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-02 01:42:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2023-04-02 01:42:38,541 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 44 [2023-04-02 01:42:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2023-04-02 01:42:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2023-04-02 01:42:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 01:42:38,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:38,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:38,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-04-02 01:42:38,749 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:38,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1255089933, now seen corresponding path program 26 times [2023-04-02 01:42:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433665370] [2023-04-02 01:42:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433665370] [2023-04-02 01:42:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433665370] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555186480] [2023-04-02 01:42:38,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:38,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:38,831 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-02 01:42:38,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:38,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:42:38,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:38,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555186480] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:39,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:39,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2023-04-02 01:42:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787410742] [2023-04-02 01:42:39,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 01:42:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 01:42:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:42:39,015 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:39,222 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2023-04-02 01:42:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:42:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-04-02 01:42:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:39,223 INFO L225 Difference]: With dead ends: 233 [2023-04-02 01:42:39,223 INFO L226 Difference]: Without dead ends: 212 [2023-04-02 01:42:39,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:42:39,225 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:39,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 22 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-04-02 01:42:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-04-02 01:42:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-02 01:42:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2023-04-02 01:42:39,311 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 44 [2023-04-02 01:42:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:39,311 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2023-04-02 01:42:39,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2023-04-02 01:42:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:42:39,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:39,313 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:39,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-04-02 01:42:39,519 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:39,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1761268627, now seen corresponding path program 27 times [2023-04-02 01:42:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789093748] [2023-04-02 01:42:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:39,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:39,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:39,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:39,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:39,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789093748] [2023-04-02 01:42:39,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789093748] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:39,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110812799] [2023-04-02 01:42:39,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:39,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:40,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:40,001 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:40,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-04-02 01:42:40,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:42:40,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:40,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 01:42:40,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:40,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:40,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110812799] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:40,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:40,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 33 [2023-04-02 01:42:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845227818] [2023-04-02 01:42:40,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:40,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:42:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:42:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:42:40,519 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:41,768 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2023-04-02 01:42:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:42:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-04-02 01:42:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:41,770 INFO L225 Difference]: With dead ends: 270 [2023-04-02 01:42:41,771 INFO L226 Difference]: Without dead ends: 264 [2023-04-02 01:42:41,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 01:42:41,773 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 170 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:41,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 01:42:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-04-02 01:42:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2023-04-02 01:42:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.1875) internal successors, (228), 210 states have internal predecessors, (228), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-02 01:42:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 264 transitions. [2023-04-02 01:42:41,843 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 264 transitions. Word has length 45 [2023-04-02 01:42:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:41,843 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 264 transitions. [2023-04-02 01:42:41,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 264 transitions. [2023-04-02 01:42:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:42:41,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:41,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:41,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-04-02 01:42:42,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-04-02 01:42:42,052 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:42,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1247111507, now seen corresponding path program 28 times [2023-04-02 01:42:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:42,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470090707] [2023-04-02 01:42:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:42,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:42,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:42,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:42,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:42,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470090707] [2023-04-02 01:42:42,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470090707] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:42,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547021337] [2023-04-02 01:42:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:42,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:42,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:42,442 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-04-02 01:42:42,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:42,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 01:42:42,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:42,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547021337] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:42,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 33 [2023-04-02 01:42:42,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446639090] [2023-04-02 01:42:42,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:42:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:42:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:42:42,995 INFO L87 Difference]: Start difference. First operand 228 states and 264 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:43,980 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2023-04-02 01:42:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:42:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-04-02 01:42:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:43,981 INFO L225 Difference]: With dead ends: 234 [2023-04-02 01:42:43,982 INFO L226 Difference]: Without dead ends: 212 [2023-04-02 01:42:43,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 01:42:43,984 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:43,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 122 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-04-02 01:42:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-04-02 01:42:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.1899441340782122) internal successors, (213), 195 states have internal predecessors, (213), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-04-02 01:42:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2023-04-02 01:42:44,051 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 45 [2023-04-02 01:42:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:44,051 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2023-04-02 01:42:44,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2023-04-02 01:42:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:42:44,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:44,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:44,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-04-02 01:42:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:44,258 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:44,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1602219117, now seen corresponding path program 29 times [2023-04-02 01:42:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107966579] [2023-04-02 01:42:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:44,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:44,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:42:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107966579] [2023-04-02 01:42:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107966579] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139226379] [2023-04-02 01:42:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:44,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:44,616 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:44,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-04-02 01:42:44,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 01:42:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:44,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 01:42:44,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:42:45,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:42:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139226379] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:45,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:45,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2023-04-02 01:42:45,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293363126] [2023-04-02 01:42:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:42:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:45,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:42:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:42:45,167 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:45,910 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2023-04-02 01:42:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:42:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-04-02 01:42:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:45,912 INFO L225 Difference]: With dead ends: 230 [2023-04-02 01:42:45,912 INFO L226 Difference]: Without dead ends: 224 [2023-04-02 01:42:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 01:42:45,914 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 132 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:42:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-04-02 01:42:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2023-04-02 01:42:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 204 states have internal predecessors, (222), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2023-04-02 01:42:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2023-04-02 01:42:45,993 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 45 [2023-04-02 01:42:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:45,994 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2023-04-02 01:42:45,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5) internal successors, (45), 27 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2023-04-02 01:42:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:42:45,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:45,996 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:46,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-04-02 01:42:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-04-02 01:42:46,201 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:46,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 215774988, now seen corresponding path program 30 times [2023-04-02 01:42:46,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:46,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991715709] [2023-04-02 01:42:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:46,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:46,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991715709] [2023-04-02 01:42:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991715709] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319021918] [2023-04-02 01:42:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:42:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:46,541 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:46,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-04-02 01:42:46,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:42:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:46,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:42:46,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:46,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:47,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319021918] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:47,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2023-04-02 01:42:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808004005] [2023-04-02 01:42:47,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:47,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:42:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:42:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:42:47,484 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:49,361 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2023-04-02 01:42:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 01:42:49,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-04-02 01:42:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:49,362 INFO L225 Difference]: With dead ends: 268 [2023-04-02 01:42:49,362 INFO L226 Difference]: Without dead ends: 254 [2023-04-02 01:42:49,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 01:42:49,363 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 350 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:49,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 137 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 01:42:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-04-02 01:42:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2023-04-02 01:42:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 226 states have internal predecessors, (246), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2023-04-02 01:42:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 287 transitions. [2023-04-02 01:42:49,443 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 287 transitions. Word has length 46 [2023-04-02 01:42:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:49,443 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 287 transitions. [2023-04-02 01:42:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 287 transitions. [2023-04-02 01:42:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:42:49,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:49,445 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:49,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-04-02 01:42:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-04-02 01:42:49,650 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:49,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash 256944047, now seen corresponding path program 31 times [2023-04-02 01:42:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:49,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956465046] [2023-04-02 01:42:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:49,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:49,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:42:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956465046] [2023-04-02 01:42:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956465046] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:50,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074142140] [2023-04-02 01:42:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:42:50,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:50,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:50,019 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:50,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-04-02 01:42:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:50,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:42:50,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:50,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074142140] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:50,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2023-04-02 01:42:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419097352] [2023-04-02 01:42:50,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:42:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:42:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:42:50,901 INFO L87 Difference]: Start difference. First operand 245 states and 287 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:53,030 INFO L93 Difference]: Finished difference Result 260 states and 302 transitions. [2023-04-02 01:42:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 01:42:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-04-02 01:42:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:53,031 INFO L225 Difference]: With dead ends: 260 [2023-04-02 01:42:53,031 INFO L226 Difference]: Without dead ends: 248 [2023-04-02 01:42:53,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=4046, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 01:42:53,033 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 330 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 157 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:42:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-02 01:42:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2023-04-02 01:42:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 227 states have internal predecessors, (247), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2023-04-02 01:42:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2023-04-02 01:42:53,121 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 46 [2023-04-02 01:42:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:53,123 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2023-04-02 01:42:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:42:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2023-04-02 01:42:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:42:53,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:53,125 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:53,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:53,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:53,330 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:53,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:53,331 INFO L85 PathProgramCache]: Analyzing trace with hash -521678067, now seen corresponding path program 32 times [2023-04-02 01:42:53,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:53,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058992506] [2023-04-02 01:42:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:53,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058992506] [2023-04-02 01:42:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058992506] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284567235] [2023-04-02 01:42:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:53,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:53,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:53,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-04-02 01:42:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:53,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 01:42:53,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:53,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:53,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284567235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:53,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:53,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2023-04-02 01:42:53,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312215825] [2023-04-02 01:42:53,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:42:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:42:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:42:53,616 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:53,971 INFO L93 Difference]: Finished difference Result 332 states and 391 transitions. [2023-04-02 01:42:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 01:42:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-04-02 01:42:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:53,973 INFO L225 Difference]: With dead ends: 332 [2023-04-02 01:42:53,973 INFO L226 Difference]: Without dead ends: 302 [2023-04-02 01:42:53,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:53,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-04-02 01:42:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2023-04-02 01:42:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 265 states have internal predecessors, (292), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2023-04-02 01:42:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2023-04-02 01:42:54,085 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 46 [2023-04-02 01:42:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:54,085 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2023-04-02 01:42:54,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:42:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2023-04-02 01:42:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:42:54,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:54,087 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:54,293 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:54,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -467445298, now seen corresponding path program 33 times [2023-04-02 01:42:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385913292] [2023-04-02 01:42:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:54,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:54,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:54,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:42:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:54,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:54,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385913292] [2023-04-02 01:42:54,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385913292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:54,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197635771] [2023-04-02 01:42:54,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:54,375 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:54,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-04-02 01:42:54,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 01:42:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:54,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 01:42:54,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:54,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 01:42:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197635771] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:54,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2023-04-02 01:42:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037639115] [2023-04-02 01:42:54,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:42:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:42:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:42:54,540 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:54,913 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2023-04-02 01:42:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 01:42:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2023-04-02 01:42:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:54,915 INFO L225 Difference]: With dead ends: 525 [2023-04-02 01:42:54,916 INFO L226 Difference]: Without dead ends: 340 [2023-04-02 01:42:54,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:54,918 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:54,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 47 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-04-02 01:42:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 322. [2023-04-02 01:42:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2023-04-02 01:42:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2023-04-02 01:42:55,043 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 46 [2023-04-02 01:42:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:55,045 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2023-04-02 01:42:55,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2023-04-02 01:42:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:42:55,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:55,047 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:55,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:55,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-04-02 01:42:55,253 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:55,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1644141558, now seen corresponding path program 34 times [2023-04-02 01:42:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:55,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520784410] [2023-04-02 01:42:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:55,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:42:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520784410] [2023-04-02 01:42:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520784410] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255893337] [2023-04-02 01:42:55,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:42:55,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:55,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:55,789 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:55,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-04-02 01:42:55,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:42:55,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:55,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:42:55,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:56,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:42:56,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255893337] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:56,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:56,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 35 [2023-04-02 01:42:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574206339] [2023-04-02 01:42:56,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 01:42:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 01:42:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1113, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 01:42:56,282 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:57,971 INFO L93 Difference]: Finished difference Result 392 states and 457 transitions. [2023-04-02 01:42:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:42:57,972 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-04-02 01:42:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:57,974 INFO L225 Difference]: With dead ends: 392 [2023-04-02 01:42:57,974 INFO L226 Difference]: Without dead ends: 386 [2023-04-02 01:42:57,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=3565, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 01:42:57,976 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 195 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:57,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 147 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 01:42:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-04-02 01:42:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2023-04-02 01:42:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 296 states have (on average 1.1891891891891893) internal successors, (352), 318 states have internal predecessors, (352), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2023-04-02 01:42:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 395 transitions. [2023-04-02 01:42:58,085 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 395 transitions. Word has length 47 [2023-04-02 01:42:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:58,085 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 395 transitions. [2023-04-02 01:42:58,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:42:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 395 transitions. [2023-04-02 01:42:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:42:58,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:58,088 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:58,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-04-02 01:42:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:58,293 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:58,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1497239530, now seen corresponding path program 35 times [2023-04-02 01:42:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175855034] [2023-04-02 01:42:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:58,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:42:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:58,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:42:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175855034] [2023-04-02 01:42:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175855034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868689083] [2023-04-02 01:42:58,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:42:58,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:58,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:58,723 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:58,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-04-02 01:42:58,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 01:42:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:58,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 01:42:58,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:59,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:42:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868689083] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:59,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:59,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 35 [2023-04-02 01:42:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419046291] [2023-04-02 01:42:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 01:42:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 01:42:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 01:42:59,252 INFO L87 Difference]: Start difference. First operand 338 states and 395 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:00,555 INFO L93 Difference]: Finished difference Result 344 states and 400 transitions. [2023-04-02 01:43:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:43:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-04-02 01:43:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:00,557 INFO L225 Difference]: With dead ends: 344 [2023-04-02 01:43:00,557 INFO L226 Difference]: Without dead ends: 322 [2023-04-02 01:43:00,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 01:43:00,560 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:00,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 147 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 01:43:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-04-02 01:43:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2023-04-02 01:43:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 303 states have internal predecessors, (337), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2023-04-02 01:43:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2023-04-02 01:43:00,692 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 47 [2023-04-02 01:43:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2023-04-02 01:43:00,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2023-04-02 01:43:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:43:00,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:00,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:00,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-04-02 01:43:00,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-04-02 01:43:00,900 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:00,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1271699905, now seen corresponding path program 36 times [2023-04-02 01:43:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131406994] [2023-04-02 01:43:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:01,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:43:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 01:43:01,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131406994] [2023-04-02 01:43:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131406994] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938876425] [2023-04-02 01:43:01,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:43:01,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:01,175 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:01,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-04-02 01:43:01,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-04-02 01:43:01,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:01,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 01:43:01,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:43:01,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:43:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938876425] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:01,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2023-04-02 01:43:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335051712] [2023-04-02 01:43:01,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:43:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:43:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:43:01,781 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:02,850 INFO L93 Difference]: Finished difference Result 378 states and 443 transitions. [2023-04-02 01:43:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:43:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-04-02 01:43:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:02,853 INFO L225 Difference]: With dead ends: 378 [2023-04-02 01:43:02,854 INFO L226 Difference]: Without dead ends: 362 [2023-04-02 01:43:02,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:43:02,856 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 236 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:02,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 102 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:43:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-04-02 01:43:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2023-04-02 01:43:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 303 states have (on average 1.174917491749175) internal successors, (356), 333 states have internal predecessors, (356), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2023-04-02 01:43:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 416 transitions. [2023-04-02 01:43:02,973 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 416 transitions. Word has length 47 [2023-04-02 01:43:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:02,973 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 416 transitions. [2023-04-02 01:43:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 416 transitions. [2023-04-02 01:43:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:43:02,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:02,977 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:02,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:03,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:03,182 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:03,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 83484810, now seen corresponding path program 37 times [2023-04-02 01:43:03,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:03,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065905852] [2023-04-02 01:43:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:03,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:43:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065905852] [2023-04-02 01:43:03,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065905852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370416509] [2023-04-02 01:43:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:43:03,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:03,564 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:03,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-04-02 01:43:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 01:43:03,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:03,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370416509] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:04,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 35 [2023-04-02 01:43:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369465823] [2023-04-02 01:43:04,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 01:43:04,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 01:43:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 01:43:04,130 INFO L87 Difference]: Start difference. First operand 357 states and 416 transitions. Second operand has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:05,063 INFO L93 Difference]: Finished difference Result 375 states and 438 transitions. [2023-04-02 01:43:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:43:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-04-02 01:43:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:05,064 INFO L225 Difference]: With dead ends: 375 [2023-04-02 01:43:05,064 INFO L226 Difference]: Without dead ends: 359 [2023-04-02 01:43:05,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 01:43:05,066 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:05,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 132 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:43:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-04-02 01:43:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 354. [2023-04-02 01:43:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.18) internal successors, (354), 330 states have internal predecessors, (354), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2023-04-02 01:43:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 414 transitions. [2023-04-02 01:43:05,203 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 414 transitions. Word has length 47 [2023-04-02 01:43:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:05,203 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 414 transitions. [2023-04-02 01:43:05,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.46875) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 414 transitions. [2023-04-02 01:43:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:43:05,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:05,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:05,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:05,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-04-02 01:43:05,412 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:05,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1251929861, now seen corresponding path program 38 times [2023-04-02 01:43:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881781286] [2023-04-02 01:43:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:05,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 01:43:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881781286] [2023-04-02 01:43:05,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881781286] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129945848] [2023-04-02 01:43:05,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:43:05,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:05,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:05,685 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:05,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-04-02 01:43:05,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:43:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:05,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 01:43:05,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:43:05,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 01:43:06,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129945848] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:06,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:06,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2023-04-02 01:43:06,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496449006] [2023-04-02 01:43:06,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:06,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 01:43:06,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 01:43:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 01:43:06,310 INFO L87 Difference]: Start difference. First operand 354 states and 414 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:07,289 INFO L93 Difference]: Finished difference Result 368 states and 427 transitions. [2023-04-02 01:43:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:43:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-04-02 01:43:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:07,291 INFO L225 Difference]: With dead ends: 368 [2023-04-02 01:43:07,291 INFO L226 Difference]: Without dead ends: 346 [2023-04-02 01:43:07,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:43:07,294 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 298 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:07,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 77 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:43:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-02 01:43:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2023-04-02 01:43:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 290 states have (on average 1.1793103448275861) internal successors, (342), 320 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2023-04-02 01:43:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 398 transitions. [2023-04-02 01:43:07,412 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 398 transitions. Word has length 47 [2023-04-02 01:43:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:07,412 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 398 transitions. [2023-04-02 01:43:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 398 transitions. [2023-04-02 01:43:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 01:43:07,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:07,415 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:07,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-04-02 01:43:07,616 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:07,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash -448253169, now seen corresponding path program 39 times [2023-04-02 01:43:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:07,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911367875] [2023-04-02 01:43:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:07,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:07,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:43:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:07,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:07,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911367875] [2023-04-02 01:43:07,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911367875] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222469700] [2023-04-02 01:43:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:43:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:07,942 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:07,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-04-02 01:43:08,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 01:43:08,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:08,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 01:43:08,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:08,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222469700] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:09,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:09,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2023-04-02 01:43:09,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265534313] [2023-04-02 01:43:09,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:09,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 01:43:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 01:43:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:43:09,079 INFO L87 Difference]: Start difference. First operand 344 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:11,398 INFO L93 Difference]: Finished difference Result 410 states and 477 transitions. [2023-04-02 01:43:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 01:43:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-04-02 01:43:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:11,400 INFO L225 Difference]: With dead ends: 410 [2023-04-02 01:43:11,400 INFO L226 Difference]: Without dead ends: 396 [2023-04-02 01:43:11,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2023-04-02 01:43:11,402 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 446 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:11,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 152 Invalid, 3290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:43:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-04-02 01:43:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 387. [2023-04-02 01:43:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 327 states have (on average 1.1773700305810397) internal successors, (385), 361 states have internal predecessors, (385), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2023-04-02 01:43:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 449 transitions. [2023-04-02 01:43:11,523 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 449 transitions. Word has length 48 [2023-04-02 01:43:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:11,523 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 449 transitions. [2023-04-02 01:43:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 449 transitions. [2023-04-02 01:43:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 01:43:11,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:11,525 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:11,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-04-02 01:43:11,726 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:11,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 827987660, now seen corresponding path program 40 times [2023-04-02 01:43:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123316955] [2023-04-02 01:43:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:11,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123316955] [2023-04-02 01:43:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123316955] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911503513] [2023-04-02 01:43:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:43:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:12,046 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-04-02 01:43:12,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:43:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:12,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 01:43:12,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:12,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911503513] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:13,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49 [2023-04-02 01:43:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053860753] [2023-04-02 01:43:13,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 01:43:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 01:43:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:43:13,111 INFO L87 Difference]: Start difference. First operand 387 states and 449 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:15,512 INFO L93 Difference]: Finished difference Result 402 states and 464 transitions. [2023-04-02 01:43:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 01:43:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-04-02 01:43:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:15,515 INFO L225 Difference]: With dead ends: 402 [2023-04-02 01:43:15,515 INFO L226 Difference]: Without dead ends: 390 [2023-04-02 01:43:15,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=458, Invalid=5394, Unknown=0, NotChecked=0, Total=5852 [2023-04-02 01:43:15,518 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 453 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 137 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:43:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-04-02 01:43:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2023-04-02 01:43:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 328 states have (on average 1.1768292682926829) internal successors, (386), 362 states have internal predecessors, (386), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2023-04-02 01:43:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 447 transitions. [2023-04-02 01:43:15,652 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 447 transitions. Word has length 48 [2023-04-02 01:43:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:15,652 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 447 transitions. [2023-04-02 01:43:15,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 48 states have internal predecessors, (82), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 447 transitions. [2023-04-02 01:43:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 01:43:15,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:15,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:15,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-04-02 01:43:15,862 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:15,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash 179082418, now seen corresponding path program 41 times [2023-04-02 01:43:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:15,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325454495] [2023-04-02 01:43:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:15,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-02 01:43:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:15,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:15,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325454495] [2023-04-02 01:43:15,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325454495] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:15,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716305601] [2023-04-02 01:43:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:43:15,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:15,955 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:15,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-04-02 01:43:16,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 01:43:16,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:16,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 01:43:16,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:16,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716305601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:16,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:16,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2023-04-02 01:43:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100604684] [2023-04-02 01:43:16,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:43:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:43:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:43:16,141 INFO L87 Difference]: Start difference. First operand 388 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:16,514 INFO L93 Difference]: Finished difference Result 593 states and 672 transitions. [2023-04-02 01:43:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 01:43:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-04-02 01:43:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:16,518 INFO L225 Difference]: With dead ends: 593 [2023-04-02 01:43:16,518 INFO L226 Difference]: Without dead ends: 383 [2023-04-02 01:43:16,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:43:16,520 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:16,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 37 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:43:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-04-02 01:43:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2023-04-02 01:43:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 351 states have internal predecessors, (375), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2023-04-02 01:43:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2023-04-02 01:43:16,660 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 48 [2023-04-02 01:43:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:16,660 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2023-04-02 01:43:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2023-04-02 01:43:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 01:43:16,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:16,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:16,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:16,869 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:16,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2046793773, now seen corresponding path program 42 times [2023-04-02 01:43:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219553157] [2023-04-02 01:43:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:16,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:16,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:16,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219553157] [2023-04-02 01:43:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219553157] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:16,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907482918] [2023-04-02 01:43:16,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:43:16,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:16,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:16,957 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:16,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-04-02 01:43:17,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-04-02 01:43:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:17,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 01:43:17,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:17,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907482918] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:17,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:17,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2023-04-02 01:43:17,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407151265] [2023-04-02 01:43:17,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:17,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:43:17,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:43:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:43:17,144 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:43:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:17,489 INFO L93 Difference]: Finished difference Result 409 states and 468 transitions. [2023-04-02 01:43:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 01:43:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-04-02 01:43:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:17,491 INFO L225 Difference]: With dead ends: 409 [2023-04-02 01:43:17,491 INFO L226 Difference]: Without dead ends: 382 [2023-04-02 01:43:17,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2023-04-02 01:43:17,493 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 22 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:43:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-04-02 01:43:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2023-04-02 01:43:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2023-04-02 01:43:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2023-04-02 01:43:17,633 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 48 [2023-04-02 01:43:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2023-04-02 01:43:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:43:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2023-04-02 01:43:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 01:43:17,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:17,636 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:17,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:17,842 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:17,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1121658739, now seen corresponding path program 43 times [2023-04-02 01:43:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:17,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193174481] [2023-04-02 01:43:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:17,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:18,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:18,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193174481] [2023-04-02 01:43:18,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193174481] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:18,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771617395] [2023-04-02 01:43:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:43:18,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:18,336 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:18,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-04-02 01:43:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:18,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-02 01:43:18,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:18,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:18,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771617395] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:18,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 37 [2023-04-02 01:43:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529724306] [2023-04-02 01:43:18,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:43:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:43:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:43:18,858 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:20,764 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2023-04-02 01:43:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 01:43:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-04-02 01:43:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:20,766 INFO L225 Difference]: With dead ends: 460 [2023-04-02 01:43:20,766 INFO L226 Difference]: Without dead ends: 454 [2023-04-02 01:43:20,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=4061, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 01:43:20,769 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 219 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4064 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:20,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 157 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4064 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 01:43:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-02 01:43:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 398. [2023-04-02 01:43:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 341 states have (on average 1.1642228739002933) internal successors, (397), 373 states have internal predecessors, (397), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2023-04-02 01:43:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2023-04-02 01:43:20,962 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 49 [2023-04-02 01:43:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:20,963 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2023-04-02 01:43:20,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2023-04-02 01:43:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 01:43:20,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:20,966 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:20,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:21,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-04-02 01:43:21,171 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:21,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1142562995, now seen corresponding path program 44 times [2023-04-02 01:43:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:21,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203142132] [2023-04-02 01:43:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:21,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203142132] [2023-04-02 01:43:21,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203142132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928165435] [2023-04-02 01:43:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:43:21,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:21,653 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:21,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-04-02 01:43:21,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:43:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:21,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:43:21,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:22,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:22,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928165435] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:22,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:22,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 37 [2023-04-02 01:43:22,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042548416] [2023-04-02 01:43:22,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:22,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:43:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:43:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:43:22,219 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:23,769 INFO L93 Difference]: Finished difference Result 404 states and 459 transitions. [2023-04-02 01:43:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:43:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-04-02 01:43:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:23,770 INFO L225 Difference]: With dead ends: 404 [2023-04-02 01:43:23,771 INFO L226 Difference]: Without dead ends: 382 [2023-04-02 01:43:23,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 01:43:23,773 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 154 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3245 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:23,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 152 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3245 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 01:43:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-04-02 01:43:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2023-04-02 01:43:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 328 states have (on average 1.1646341463414633) internal successors, (382), 358 states have internal predecessors, (382), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2023-04-02 01:43:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2023-04-02 01:43:23,926 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 49 [2023-04-02 01:43:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:23,927 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2023-04-02 01:43:23,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2023-04-02 01:43:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 01:43:23,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:23,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:23,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-04-02 01:43:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:24,130 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:24,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 690493581, now seen corresponding path program 45 times [2023-04-02 01:43:24,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:24,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040757939] [2023-04-02 01:43:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:24,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:24,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:24,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040757939] [2023-04-02 01:43:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040757939] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768144036] [2023-04-02 01:43:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:43:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:24,553 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:24,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-04-02 01:43:24,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 01:43:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:24,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 01:43:24,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:25,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768144036] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:25,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 37 [2023-04-02 01:43:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126556547] [2023-04-02 01:43:25,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 01:43:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 01:43:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 01:43:25,147 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:26,356 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2023-04-02 01:43:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:43:26,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-04-02 01:43:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:26,358 INFO L225 Difference]: With dead ends: 388 [2023-04-02 01:43:26,358 INFO L226 Difference]: Without dead ends: 364 [2023-04-02 01:43:26,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 01:43:26,360 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:26,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 137 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:43:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-04-02 01:43:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-04-02 01:43:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 313 states have (on average 1.1661341853035143) internal successors, (365), 341 states have internal predecessors, (365), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-04-02 01:43:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 416 transitions. [2023-04-02 01:43:26,536 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 416 transitions. Word has length 49 [2023-04-02 01:43:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:26,536 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 416 transitions. [2023-04-02 01:43:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 31 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 416 transitions. [2023-04-02 01:43:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 01:43:26,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:26,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:26,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-04-02 01:43:26,745 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:26,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 375234381, now seen corresponding path program 46 times [2023-04-02 01:43:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892181074] [2023-04-02 01:43:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:26,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:26,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:43:27,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:27,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892181074] [2023-04-02 01:43:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892181074] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982478625] [2023-04-02 01:43:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:43:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:27,162 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-04-02 01:43:27,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:43:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:27,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-02 01:43:27,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 01:43:27,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:43:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982478625] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:27,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:27,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 24] total 41 [2023-04-02 01:43:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834104054] [2023-04-02 01:43:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:27,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:43:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:43:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:43:27,898 INFO L87 Difference]: Start difference. First operand 364 states and 416 transitions. Second operand has 41 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 35 states have internal predecessors, (54), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:28,980 INFO L93 Difference]: Finished difference Result 382 states and 437 transitions. [2023-04-02 01:43:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:43:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 35 states have internal predecessors, (54), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-04-02 01:43:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:28,983 INFO L225 Difference]: With dead ends: 382 [2023-04-02 01:43:28,983 INFO L226 Difference]: Without dead ends: 376 [2023-04-02 01:43:28,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=271, Invalid=4285, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:43:28,985 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:28,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 162 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:43:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-04-02 01:43:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2023-04-02 01:43:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 320 states have (on average 1.16875) internal successors, (374), 350 states have internal predecessors, (374), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2023-04-02 01:43:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 429 transitions. [2023-04-02 01:43:29,144 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 429 transitions. Word has length 49 [2023-04-02 01:43:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:29,144 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 429 transitions. [2023-04-02 01:43:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 35 states have internal predecessors, (54), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 429 transitions. [2023-04-02 01:43:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:43:29,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:29,148 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:29,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:29,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:29,353 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:29,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1431154964, now seen corresponding path program 47 times [2023-04-02 01:43:29,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:29,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466118361] [2023-04-02 01:43:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:29,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:29,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466118361] [2023-04-02 01:43:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466118361] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:29,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206016924] [2023-04-02 01:43:29,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:43:29,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:29,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:29,764 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:29,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-04-02 01:43:29,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-02 01:43:29,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:29,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 01:43:29,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:30,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:31,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206016924] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:31,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:31,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2023-04-02 01:43:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401423997] [2023-04-02 01:43:31,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-02 01:43:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-02 01:43:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 01:43:31,059 INFO L87 Difference]: Start difference. First operand 374 states and 429 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:34,004 INFO L93 Difference]: Finished difference Result 442 states and 510 transitions. [2023-04-02 01:43:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 01:43:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-04-02 01:43:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:34,011 INFO L225 Difference]: With dead ends: 442 [2023-04-02 01:43:34,011 INFO L226 Difference]: Without dead ends: 428 [2023-04-02 01:43:34,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2023-04-02 01:43:34,013 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 535 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:34,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 162 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3994 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 01:43:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-04-02 01:43:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 419. [2023-04-02 01:43:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 393 states have internal predecessors, (419), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2023-04-02 01:43:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 482 transitions. [2023-04-02 01:43:34,183 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 482 transitions. Word has length 50 [2023-04-02 01:43:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:34,183 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 482 transitions. [2023-04-02 01:43:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 482 transitions. [2023-04-02 01:43:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:43:34,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:34,186 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:34,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:34,391 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:34,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash -522394929, now seen corresponding path program 48 times [2023-04-02 01:43:34,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:34,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295689131] [2023-04-02 01:43:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295689131] [2023-04-02 01:43:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295689131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340348712] [2023-04-02 01:43:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:43:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:34,762 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:34,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-04-02 01:43:34,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-04-02 01:43:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:34,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 01:43:34,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:35,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:43:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340348712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:36,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2023-04-02 01:43:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067457402] [2023-04-02 01:43:36,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:36,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-02 01:43:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-02 01:43:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2790, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 01:43:36,025 INFO L87 Difference]: Start difference. First operand 419 states and 482 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:39,155 INFO L93 Difference]: Finished difference Result 434 states and 497 transitions. [2023-04-02 01:43:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 01:43:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-04-02 01:43:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:39,157 INFO L225 Difference]: With dead ends: 434 [2023-04-02 01:43:39,157 INFO L226 Difference]: Without dead ends: 422 [2023-04-02 01:43:39,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=546, Invalid=6936, Unknown=0, NotChecked=0, Total=7482 [2023-04-02 01:43:39,159 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 536 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 4500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:39,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 172 Invalid, 4500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 01:43:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-04-02 01:43:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2023-04-02 01:43:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 360 states have (on average 1.1666666666666667) internal successors, (420), 394 states have internal predecessors, (420), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2023-04-02 01:43:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 480 transitions. [2023-04-02 01:43:39,320 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 480 transitions. Word has length 50 [2023-04-02 01:43:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 480 transitions. [2023-04-02 01:43:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 480 transitions. [2023-04-02 01:43:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:43:39,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:39,323 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:39,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-04-02 01:43:39,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-04-02 01:43:39,524 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:39,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 96500781, now seen corresponding path program 49 times [2023-04-02 01:43:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:39,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101307164] [2023-04-02 01:43:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:39,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:39,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:39,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:39,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:39,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101307164] [2023-04-02 01:43:39,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101307164] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:39,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581866077] [2023-04-02 01:43:39,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:43:39,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:39,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:39,619 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:39,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-04-02 01:43:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:39,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 01:43:39,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:39,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:39,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581866077] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:39,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:39,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-04-02 01:43:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025651280] [2023-04-02 01:43:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 01:43:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 01:43:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:43:39,820 INFO L87 Difference]: Start difference. First operand 420 states and 480 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:43:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:40,311 INFO L93 Difference]: Finished difference Result 540 states and 625 transitions. [2023-04-02 01:43:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:43:40,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-04-02 01:43:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:40,313 INFO L225 Difference]: With dead ends: 540 [2023-04-02 01:43:40,313 INFO L226 Difference]: Without dead ends: 502 [2023-04-02 01:43:40,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 01:43:40,317 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:40,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 27 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:43:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-04-02 01:43:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2023-04-02 01:43:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.1650717703349283) internal successors, (487), 452 states have internal predecessors, (487), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2023-04-02 01:43:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 547 transitions. [2023-04-02 01:43:40,567 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 547 transitions. Word has length 50 [2023-04-02 01:43:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:40,567 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 547 transitions. [2023-04-02 01:43:40,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:43:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 547 transitions. [2023-04-02 01:43:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:43:40,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:40,570 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:40,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:40,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-04-02 01:43:40,771 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:40,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989358, now seen corresponding path program 50 times [2023-04-02 01:43:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:40,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704752188] [2023-04-02 01:43:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:40,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:40,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704752188] [2023-04-02 01:43:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704752188] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819202312] [2023-04-02 01:43:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:43:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:40,881 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:40,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-04-02 01:43:40,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:43:40,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:40,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 01:43:40,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:41,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:43:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819202312] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:41,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:41,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-04-02 01:43:41,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139111954] [2023-04-02 01:43:41,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:41,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 01:43:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 01:43:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:43:41,086 INFO L87 Difference]: Start difference. First operand 478 states and 547 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:41,658 INFO L93 Difference]: Finished difference Result 857 states and 980 transitions. [2023-04-02 01:43:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:43:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-04-02 01:43:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:41,662 INFO L225 Difference]: With dead ends: 857 [2023-04-02 01:43:41,662 INFO L226 Difference]: Without dead ends: 560 [2023-04-02 01:43:41,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 01:43:41,666 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:41,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 32 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:43:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-04-02 01:43:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2023-04-02 01:43:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2023-04-02 01:43:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 614 transitions. [2023-04-02 01:43:41,904 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 614 transitions. Word has length 50 [2023-04-02 01:43:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:41,904 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 614 transitions. [2023-04-02 01:43:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 614 transitions. [2023-04-02 01:43:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:41,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:41,907 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:41,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-04-02 01:43:42,108 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:42,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash -33846038, now seen corresponding path program 51 times [2023-04-02 01:43:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899596775] [2023-04-02 01:43:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899596775] [2023-04-02 01:43:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899596775] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747482809] [2023-04-02 01:43:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:43:42,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:42,660 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:42,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-04-02 01:43:42,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 01:43:42,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:42,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-02 01:43:42,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:42,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:43:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747482809] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:43,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 39 [2023-04-02 01:43:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153825177] [2023-04-02 01:43:43,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:43,180 INFO L87 Difference]: Start difference. First operand 536 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:45,465 INFO L93 Difference]: Finished difference Result 628 states and 719 transitions. [2023-04-02 01:43:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 01:43:45,466 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-04-02 01:43:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:45,468 INFO L225 Difference]: With dead ends: 628 [2023-04-02 01:43:45,469 INFO L226 Difference]: Without dead ends: 622 [2023-04-02 01:43:45,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=4589, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 01:43:45,471 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 244 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4915 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 4933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:45,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 167 Invalid, 4933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4915 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 01:43:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-04-02 01:43:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 552. [2023-04-02 01:43:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 489 states have (on average 1.16359918200409) internal successors, (569), 525 states have internal predecessors, (569), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2023-04-02 01:43:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 633 transitions. [2023-04-02 01:43:45,719 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 633 transitions. Word has length 51 [2023-04-02 01:43:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:45,719 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 633 transitions. [2023-04-02 01:43:45,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 633 transitions. [2023-04-02 01:43:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:45,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:45,722 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:45,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:45,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:45,922 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:45,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2139086154, now seen corresponding path program 52 times [2023-04-02 01:43:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30350147] [2023-04-02 01:43:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:46,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:46,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:46,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30350147] [2023-04-02 01:43:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30350147] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958570505] [2023-04-02 01:43:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:43:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:46,418 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-04-02 01:43:46,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:43:46,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:46,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-02 01:43:46,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:46,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:43:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958570505] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:47,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:47,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 39 [2023-04-02 01:43:47,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41716483] [2023-04-02 01:43:47,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:47,047 INFO L87 Difference]: Start difference. First operand 552 states and 633 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:48,970 INFO L93 Difference]: Finished difference Result 558 states and 638 transitions. [2023-04-02 01:43:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 01:43:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-04-02 01:43:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:48,972 INFO L225 Difference]: With dead ends: 558 [2023-04-02 01:43:48,972 INFO L226 Difference]: Without dead ends: 536 [2023-04-02 01:43:48,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:43:48,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 180 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3832 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:48,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 162 Invalid, 3840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3832 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:43:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-02 01:43:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2023-04-02 01:43:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 476 states have (on average 1.1638655462184875) internal successors, (554), 510 states have internal predecessors, (554), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2023-04-02 01:43:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2023-04-02 01:43:49,204 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 51 [2023-04-02 01:43:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:49,204 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2023-04-02 01:43:49,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2023-04-02 01:43:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:49,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:49,208 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:49,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:49,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-04-02 01:43:49,413 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:49,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1318950550, now seen corresponding path program 53 times [2023-04-02 01:43:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:49,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759121494] [2023-04-02 01:43:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:49,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:49,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:49,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759121494] [2023-04-02 01:43:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759121494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932720301] [2023-04-02 01:43:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:43:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:49,875 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:49,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-04-02 01:43:49,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 01:43:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:49,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:43:49,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:50,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:43:50,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932720301] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:50,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:50,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 39 [2023-04-02 01:43:50,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449723749] [2023-04-02 01:43:50,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:50,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:50,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:50,499 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:52,119 INFO L93 Difference]: Finished difference Result 542 states and 620 transitions. [2023-04-02 01:43:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:43:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-04-02 01:43:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:52,121 INFO L225 Difference]: With dead ends: 542 [2023-04-02 01:43:52,121 INFO L226 Difference]: Without dead ends: 518 [2023-04-02 01:43:52,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 01:43:52,123 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3085 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:52,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 177 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3085 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 01:43:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-04-02 01:43:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2023-04-02 01:43:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.1648590021691974) internal successors, (537), 493 states have internal predecessors, (537), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2023-04-02 01:43:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 595 transitions. [2023-04-02 01:43:52,339 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 595 transitions. Word has length 51 [2023-04-02 01:43:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:52,339 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 595 transitions. [2023-04-02 01:43:52,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 595 transitions. [2023-04-02 01:43:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:52,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:52,343 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:52,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-04-02 01:43:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:52,544 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:52,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash -774418501, now seen corresponding path program 54 times [2023-04-02 01:43:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:52,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668952390] [2023-04-02 01:43:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:52,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-02 01:43:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 01:43:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668952390] [2023-04-02 01:43:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668952390] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477915510] [2023-04-02 01:43:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:43:52,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:52,822 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:52,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-04-02 01:43:52,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:43:52,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:52,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:43:52,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 01:43:53,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 01:43:53,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477915510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:53,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:53,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2023-04-02 01:43:53,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116402777] [2023-04-02 01:43:53,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:53,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:53,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:53,550 INFO L87 Difference]: Start difference. First operand 518 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:55,194 INFO L93 Difference]: Finished difference Result 590 states and 681 transitions. [2023-04-02 01:43:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:43:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-04-02 01:43:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:55,200 INFO L225 Difference]: With dead ends: 590 [2023-04-02 01:43:55,201 INFO L226 Difference]: Without dead ends: 573 [2023-04-02 01:43:55,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 01:43:55,203 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 364 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:55,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 132 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 01:43:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-04-02 01:43:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2023-04-02 01:43:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 490 states have (on average 1.153061224489796) internal successors, (565), 536 states have internal predecessors, (565), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2023-04-02 01:43:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 651 transitions. [2023-04-02 01:43:55,440 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 651 transitions. Word has length 51 [2023-04-02 01:43:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:55,441 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 651 transitions. [2023-04-02 01:43:55,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:43:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 651 transitions. [2023-04-02 01:43:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:55,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:55,446 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:55,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:55,652 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:55,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -103251766, now seen corresponding path program 55 times [2023-04-02 01:43:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745466007] [2023-04-02 01:43:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:55,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:55,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:43:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745466007] [2023-04-02 01:43:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745466007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187450218] [2023-04-02 01:43:56,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:43:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:56,185 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:56,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-04-02 01:43:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:56,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 01:43:56,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:43:56,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:43:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187450218] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:56,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:56,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2023-04-02 01:43:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880385393] [2023-04-02 01:43:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:56,977 INFO L87 Difference]: Start difference. First operand 568 states and 651 transitions. Second operand has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:58,275 INFO L93 Difference]: Finished difference Result 586 states and 673 transitions. [2023-04-02 01:43:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:43:58,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-04-02 01:43:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:58,278 INFO L225 Difference]: With dead ends: 586 [2023-04-02 01:43:58,278 INFO L226 Difference]: Without dead ends: 569 [2023-04-02 01:43:58,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=3785, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 01:43:58,281 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:58,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 172 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:43:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-04-02 01:43:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2023-04-02 01:43:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 486 states have (on average 1.1563786008230452) internal successors, (562), 532 states have internal predecessors, (562), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2023-04-02 01:43:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 648 transitions. [2023-04-02 01:43:58,500 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 648 transitions. Word has length 51 [2023-04-02 01:43:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:58,501 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 648 transitions. [2023-04-02 01:43:58,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 33 states have internal predecessors, (51), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:43:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 648 transitions. [2023-04-02 01:43:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 01:43:58,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:58,506 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:58,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:58,711 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:58,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2133704513, now seen corresponding path program 56 times [2023-04-02 01:43:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105210849] [2023-04-02 01:43:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:58,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:58,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:43:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:43:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 01:43:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:58,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105210849] [2023-04-02 01:43:58,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105210849] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990669077] [2023-04-02 01:43:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:43:58,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:58,983 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-04-02 01:43:59,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:43:59,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:59,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:43:59,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 01:43:59,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 01:43:59,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990669077] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:59,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:59,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 39 [2023-04-02 01:43:59,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317462030] [2023-04-02 01:43:59,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:43:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:43:59,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:43:59,729 INFO L87 Difference]: Start difference. First operand 564 states and 648 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:01,269 INFO L93 Difference]: Finished difference Result 578 states and 661 transitions. [2023-04-02 01:44:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:44:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-04-02 01:44:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:01,272 INFO L225 Difference]: With dead ends: 578 [2023-04-02 01:44:01,272 INFO L226 Difference]: Without dead ends: 554 [2023-04-02 01:44:01,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 01:44:01,274 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 380 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:01,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 117 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:44:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-02 01:44:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2023-04-02 01:44:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 474 states have (on average 1.1561181434599157) internal successors, (548), 520 states have internal predecessors, (548), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2023-04-02 01:44:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 628 transitions. [2023-04-02 01:44:01,487 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 628 transitions. Word has length 51 [2023-04-02 01:44:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:01,487 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 628 transitions. [2023-04-02 01:44:01,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 628 transitions. [2023-04-02 01:44:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 01:44:01,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:01,490 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:01,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:01,691 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:01,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2068699601, now seen corresponding path program 57 times [2023-04-02 01:44:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042002264] [2023-04-02 01:44:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:01,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:01,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:44:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:02,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042002264] [2023-04-02 01:44:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042002264] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492547277] [2023-04-02 01:44:02,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:44:02,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:02,157 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:02,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-04-02 01:44:02,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 01:44:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:02,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 01:44:02,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:02,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:03,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492547277] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:03,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:03,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2023-04-02 01:44:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761325476] [2023-04-02 01:44:03,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:03,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-02 01:44:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-02 01:44:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 01:44:03,645 INFO L87 Difference]: Start difference. First operand 552 states and 628 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:07,376 INFO L93 Difference]: Finished difference Result 642 states and 735 transitions. [2023-04-02 01:44:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 01:44:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2023-04-02 01:44:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:07,381 INFO L225 Difference]: With dead ends: 642 [2023-04-02 01:44:07,381 INFO L226 Difference]: Without dead ends: 628 [2023-04-02 01:44:07,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2023-04-02 01:44:07,386 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 635 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5083 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 5145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 5083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:07,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 172 Invalid, 5145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 5083 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 01:44:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-04-02 01:44:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2023-04-02 01:44:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 532 states have (on average 1.1541353383458646) internal successors, (614), 584 states have internal predecessors, (614), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2023-04-02 01:44:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 706 transitions. [2023-04-02 01:44:07,635 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 706 transitions. Word has length 52 [2023-04-02 01:44:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:07,635 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 706 transitions. [2023-04-02 01:44:07,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 706 transitions. [2023-04-02 01:44:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 01:44:07,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:07,649 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:07,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-04-02 01:44:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-04-02 01:44:07,855 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:07,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash 333057708, now seen corresponding path program 58 times [2023-04-02 01:44:07,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:07,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577131998] [2023-04-02 01:44:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:07,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:08,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577131998] [2023-04-02 01:44:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577131998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849580628] [2023-04-02 01:44:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:44:08,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:08,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:08,288 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:08,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-04-02 01:44:08,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:44:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:08,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 01:44:08,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:08,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849580628] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:09,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:09,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2023-04-02 01:44:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353564539] [2023-04-02 01:44:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-02 01:44:09,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-02 01:44:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3459, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 01:44:09,835 INFO L87 Difference]: Start difference. First operand 619 states and 706 transitions. Second operand has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:13,581 INFO L93 Difference]: Finished difference Result 634 states and 721 transitions. [2023-04-02 01:44:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 01:44:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2023-04-02 01:44:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:13,584 INFO L225 Difference]: With dead ends: 634 [2023-04-02 01:44:13,584 INFO L226 Difference]: Without dead ends: 622 [2023-04-02 01:44:13,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=640, Invalid=8672, Unknown=0, NotChecked=0, Total=9312 [2023-04-02 01:44:13,593 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 651 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5144 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 5191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:13,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 172 Invalid, 5191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5144 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 01:44:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-04-02 01:44:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2023-04-02 01:44:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 533 states have (on average 1.1538461538461537) internal successors, (615), 585 states have internal predecessors, (615), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2023-04-02 01:44:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 703 transitions. [2023-04-02 01:44:13,851 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 703 transitions. Word has length 52 [2023-04-02 01:44:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:13,851 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 703 transitions. [2023-04-02 01:44:13,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 703 transitions. [2023-04-02 01:44:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 01:44:13,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:13,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:13,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-04-02 01:44:14,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-04-02 01:44:14,062 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:14,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash -765588306, now seen corresponding path program 59 times [2023-04-02 01:44:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:14,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022753010] [2023-04-02 01:44:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:44:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022753010] [2023-04-02 01:44:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022753010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653494701] [2023-04-02 01:44:14,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:44:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:14,171 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:14,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-04-02 01:44:14,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-02 01:44:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:14,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:44:14,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:14,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:14,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653494701] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:14,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:14,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2023-04-02 01:44:14,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286963965] [2023-04-02 01:44:14,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:44:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:44:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:44:14,395 INFO L87 Difference]: Start difference. First operand 620 states and 703 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:14,984 INFO L93 Difference]: Finished difference Result 944 states and 1054 transitions. [2023-04-02 01:44:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:44:14,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2023-04-02 01:44:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:14,989 INFO L225 Difference]: With dead ends: 944 [2023-04-02 01:44:14,989 INFO L226 Difference]: Without dead ends: 617 [2023-04-02 01:44:14,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 01:44:14,993 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:14,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:44:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-02 01:44:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 609. [2023-04-02 01:44:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 528 states have (on average 1.1477272727272727) internal successors, (606), 576 states have internal predecessors, (606), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2023-04-02 01:44:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 686 transitions. [2023-04-02 01:44:15,267 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 686 transitions. Word has length 52 [2023-04-02 01:44:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:15,267 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 686 transitions. [2023-04-02 01:44:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 686 transitions. [2023-04-02 01:44:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 01:44:15,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:15,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:15,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-04-02 01:44:15,478 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:15,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 295087821, now seen corresponding path program 60 times [2023-04-02 01:44:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:15,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170634474] [2023-04-02 01:44:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:15,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:15,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170634474] [2023-04-02 01:44:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170634474] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066458855] [2023-04-02 01:44:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:44:15,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:15,612 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:15,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-04-02 01:44:15,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:44:15,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:15,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:44:15,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:15,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066458855] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:15,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2023-04-02 01:44:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877291799] [2023-04-02 01:44:15,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 01:44:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 01:44:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:44:15,880 INFO L87 Difference]: Start difference. First operand 609 states and 686 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:44:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:16,622 INFO L93 Difference]: Finished difference Result 651 states and 736 transitions. [2023-04-02 01:44:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:44:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-04-02 01:44:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:16,624 INFO L225 Difference]: With dead ends: 651 [2023-04-02 01:44:16,625 INFO L226 Difference]: Without dead ends: 618 [2023-04-02 01:44:16,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=1066, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 01:44:16,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:16,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 52 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:44:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-04-02 01:44:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2023-04-02 01:44:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2023-04-02 01:44:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 695 transitions. [2023-04-02 01:44:16,894 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 695 transitions. Word has length 52 [2023-04-02 01:44:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:16,894 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 695 transitions. [2023-04-02 01:44:16,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:44:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 695 transitions. [2023-04-02 01:44:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:44:16,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:16,898 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:16,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-04-02 01:44:17,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:17,098 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:17,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:17,098 INFO L85 PathProgramCache]: Analyzing trace with hash 715381933, now seen corresponding path program 61 times [2023-04-02 01:44:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:17,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777406897] [2023-04-02 01:44:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:17,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:17,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777406897] [2023-04-02 01:44:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777406897] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508803153] [2023-04-02 01:44:17,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:44:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:17,710 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:17,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-04-02 01:44:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:17,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-02 01:44:17,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:18,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:18,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508803153] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:18,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:18,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 41 [2023-04-02 01:44:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492677555] [2023-04-02 01:44:18,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:18,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:44:18,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:18,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:44:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1551, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:44:18,234 INFO L87 Difference]: Start difference. First operand 618 states and 695 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:20,835 INFO L93 Difference]: Finished difference Result 718 states and 808 transitions. [2023-04-02 01:44:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 01:44:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-02 01:44:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:20,839 INFO L225 Difference]: With dead ends: 718 [2023-04-02 01:44:20,839 INFO L226 Difference]: Without dead ends: 712 [2023-04-02 01:44:20,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=5149, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 01:44:20,842 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 268 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5527 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 5546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:20,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 172 Invalid, 5546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5527 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 01:44:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2023-04-02 01:44:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 634. [2023-04-02 01:44:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 600 states have internal predecessors, (630), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2023-04-02 01:44:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 714 transitions. [2023-04-02 01:44:21,119 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 714 transitions. Word has length 53 [2023-04-02 01:44:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:21,119 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 714 transitions. [2023-04-02 01:44:21,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 714 transitions. [2023-04-02 01:44:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:44:21,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:21,123 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:21,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:21,323 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:21,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash -839303187, now seen corresponding path program 62 times [2023-04-02 01:44:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690891458] [2023-04-02 01:44:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:21,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:44:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690891458] [2023-04-02 01:44:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690891458] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645354066] [2023-04-02 01:44:21,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:44:21,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:21,889 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-04-02 01:44:21,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:44:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:21,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-02 01:44:21,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:44:22,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:44:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645354066] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:22,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:22,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 41 [2023-04-02 01:44:22,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285629993] [2023-04-02 01:44:22,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:22,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:44:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:44:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:44:22,522 INFO L87 Difference]: Start difference. First operand 634 states and 714 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:24,792 INFO L93 Difference]: Finished difference Result 640 states and 719 transitions. [2023-04-02 01:44:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 01:44:24,792 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-02 01:44:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:24,795 INFO L225 Difference]: With dead ends: 640 [2023-04-02 01:44:24,795 INFO L226 Difference]: Without dead ends: 618 [2023-04-02 01:44:24,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=4857, Unknown=0, NotChecked=0, Total=5112 [2023-04-02 01:44:24,799 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 197 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:24,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 167 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4592 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 01:44:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-04-02 01:44:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2023-04-02 01:44:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 537 states have (on average 1.1452513966480447) internal successors, (615), 585 states have internal predecessors, (615), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2023-04-02 01:44:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 696 transitions. [2023-04-02 01:44:25,083 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 696 transitions. Word has length 53 [2023-04-02 01:44:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:25,083 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 696 transitions. [2023-04-02 01:44:25,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 696 transitions. [2023-04-02 01:44:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:44:25,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:25,086 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:25,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-04-02 01:44:25,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:25,287 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:25,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash 886283437, now seen corresponding path program 63 times [2023-04-02 01:44:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:25,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479140474] [2023-04-02 01:44:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:25,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:25,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:25,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:44:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479140474] [2023-04-02 01:44:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479140474] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528223939] [2023-04-02 01:44:25,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:44:25,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:25,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:25,849 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:25,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-04-02 01:44:25,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:44:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:25,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-02 01:44:25,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:44:26,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:44:26,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528223939] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:26,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:26,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 41 [2023-04-02 01:44:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014513071] [2023-04-02 01:44:26,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:26,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:44:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:44:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:44:26,519 INFO L87 Difference]: Start difference. First operand 618 states and 696 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:28,455 INFO L93 Difference]: Finished difference Result 624 states and 701 transitions. [2023-04-02 01:44:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 01:44:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-02 01:44:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:28,458 INFO L225 Difference]: With dead ends: 624 [2023-04-02 01:44:28,458 INFO L226 Difference]: Without dead ends: 600 [2023-04-02 01:44:28,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=4573, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 01:44:28,462 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 154 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3845 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:28,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 177 Invalid, 3851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3845 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:44:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-04-02 01:44:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2023-04-02 01:44:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 522 states have (on average 1.1455938697318007) internal successors, (598), 568 states have internal predecessors, (598), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2023-04-02 01:44:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 676 transitions. [2023-04-02 01:44:28,725 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 676 transitions. Word has length 53 [2023-04-02 01:44:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:28,725 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 676 transitions. [2023-04-02 01:44:28,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 676 transitions. [2023-04-02 01:44:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:44:28,728 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:28,729 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:28,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:28,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:28,929 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:28,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash -537493523, now seen corresponding path program 64 times [2023-04-02 01:44:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13209889] [2023-04-02 01:44:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:44:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13209889] [2023-04-02 01:44:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13209889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599311233] [2023-04-02 01:44:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:44:29,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:29,416 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:29,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-04-02 01:44:29,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:44:29,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:29,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:44:29,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:44:29,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:44:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599311233] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:30,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2023-04-02 01:44:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098544577] [2023-04-02 01:44:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:44:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:44:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:44:30,132 INFO L87 Difference]: Start difference. First operand 600 states and 676 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:31,553 INFO L93 Difference]: Finished difference Result 606 states and 681 transitions. [2023-04-02 01:44:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:44:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-02 01:44:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:31,555 INFO L225 Difference]: With dead ends: 606 [2023-04-02 01:44:31,555 INFO L226 Difference]: Without dead ends: 580 [2023-04-02 01:44:31,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=4297, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:44:31,558 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:31,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 147 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:44:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-04-02 01:44:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2023-04-02 01:44:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 549 states have internal predecessors, (579), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2023-04-02 01:44:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 654 transitions. [2023-04-02 01:44:31,809 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 654 transitions. Word has length 53 [2023-04-02 01:44:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:31,809 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 654 transitions. [2023-04-02 01:44:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 654 transitions. [2023-04-02 01:44:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 01:44:31,814 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:31,814 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:31,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-04-02 01:44:32,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:32,020 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:32,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1906924717, now seen corresponding path program 65 times [2023-04-02 01:44:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556314795] [2023-04-02 01:44:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:32,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:44:32,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556314795] [2023-04-02 01:44:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556314795] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73126226] [2023-04-02 01:44:32,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:44:32,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:32,535 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-04-02 01:44:32,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-02 01:44:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:32,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 01:44:32,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:44:33,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:44:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73126226] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:33,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:33,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2023-04-02 01:44:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440044579] [2023-04-02 01:44:33,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 01:44:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 01:44:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:44:33,325 INFO L87 Difference]: Start difference. First operand 580 states and 654 transitions. Second operand has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:34,431 INFO L93 Difference]: Finished difference Result 598 states and 675 transitions. [2023-04-02 01:44:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:44:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-02 01:44:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:34,435 INFO L225 Difference]: With dead ends: 598 [2023-04-02 01:44:34,435 INFO L226 Difference]: Without dead ends: 592 [2023-04-02 01:44:34,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 01:44:34,437 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:34,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 137 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:44:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-04-02 01:44:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2023-04-02 01:44:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 512 states have (on average 1.1484375) internal successors, (588), 558 states have internal predecessors, (588), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2023-04-02 01:44:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 667 transitions. [2023-04-02 01:44:34,694 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 667 transitions. Word has length 53 [2023-04-02 01:44:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:34,694 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 667 transitions. [2023-04-02 01:44:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.394736842105263) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 667 transitions. [2023-04-02 01:44:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 01:44:34,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:34,697 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:34,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-04-02 01:44:34,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-04-02 01:44:34,898 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:34,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -317468980, now seen corresponding path program 66 times [2023-04-02 01:44:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:34,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629069614] [2023-04-02 01:44:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:34,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:34,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629069614] [2023-04-02 01:44:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629069614] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697571844] [2023-04-02 01:44:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:44:35,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:35,381 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-04-02 01:44:35,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-02 01:44:35,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:35,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 01:44:35,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:36,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:37,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697571844] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:37,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2023-04-02 01:44:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537335127] [2023-04-02 01:44:37,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:37,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-02 01:44:37,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-02 01:44:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 01:44:37,141 INFO L87 Difference]: Start difference. First operand 590 states and 667 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:41,831 INFO L93 Difference]: Finished difference Result 682 states and 776 transitions. [2023-04-02 01:44:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 01:44:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-04-02 01:44:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:41,837 INFO L225 Difference]: With dead ends: 682 [2023-04-02 01:44:41,837 INFO L226 Difference]: Without dead ends: 668 [2023-04-02 01:44:41,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 01:44:41,840 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 788 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6370 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 6444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 6370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:41,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 207 Invalid, 6444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 6370 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 01:44:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-04-02 01:44:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 659. [2023-04-02 01:44:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 572 states have (on average 1.1468531468531469) internal successors, (656), 624 states have internal predecessors, (656), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2023-04-02 01:44:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 747 transitions. [2023-04-02 01:44:42,286 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 747 transitions. Word has length 54 [2023-04-02 01:44:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:42,286 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 747 transitions. [2023-04-02 01:44:42,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 747 transitions. [2023-04-02 01:44:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 01:44:42,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:42,291 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:42,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:42,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-04-02 01:44:42,497 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:42,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1122563567, now seen corresponding path program 67 times [2023-04-02 01:44:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:42,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256812864] [2023-04-02 01:44:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:44:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:42,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256812864] [2023-04-02 01:44:42,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256812864] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048474397] [2023-04-02 01:44:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:44:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:42,979 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:42,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-04-02 01:44:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:43,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 01:44:43,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:43,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:44:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048474397] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:44,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 67 [2023-04-02 01:44:44,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789809629] [2023-04-02 01:44:44,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:44,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-02 01:44:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-02 01:44:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 01:44:44,774 INFO L87 Difference]: Start difference. First operand 659 states and 747 transitions. Second operand has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:49,513 INFO L93 Difference]: Finished difference Result 674 states and 762 transitions. [2023-04-02 01:44:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 01:44:49,513 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-04-02 01:44:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:49,516 INFO L225 Difference]: With dead ends: 674 [2023-04-02 01:44:49,516 INFO L226 Difference]: Without dead ends: 662 [2023-04-02 01:44:49,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=740, Invalid=10602, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 01:44:49,519 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 768 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6686 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 6743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:49,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 202 Invalid, 6743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 6686 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 01:44:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-04-02 01:44:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 660. [2023-04-02 01:44:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 573 states have (on average 1.1465968586387434) internal successors, (657), 625 states have internal predecessors, (657), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2023-04-02 01:44:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 744 transitions. [2023-04-02 01:44:49,830 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 744 transitions. Word has length 54 [2023-04-02 01:44:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:49,830 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 744 transitions. [2023-04-02 01:44:49,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.492537313432836) internal successors, (100), 66 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:44:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 744 transitions. [2023-04-02 01:44:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 01:44:49,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:49,834 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:49,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-04-02 01:44:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-04-02 01:44:50,035 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:50,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 334260941, now seen corresponding path program 68 times [2023-04-02 01:44:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147725701] [2023-04-02 01:44:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:50,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147725701] [2023-04-02 01:44:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147725701] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104659421] [2023-04-02 01:44:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:44:50,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:50,179 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-04-02 01:44:50,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:44:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:50,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:44:50,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:50,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104659421] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:50,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2023-04-02 01:44:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315382830] [2023-04-02 01:44:50,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:44:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:44:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:44:50,473 INFO L87 Difference]: Start difference. First operand 660 states and 744 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:44:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:51,328 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2023-04-02 01:44:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:44:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-04-02 01:44:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:51,332 INFO L225 Difference]: With dead ends: 818 [2023-04-02 01:44:51,332 INFO L226 Difference]: Without dead ends: 772 [2023-04-02 01:44:51,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 01:44:51,336 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 146 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:51,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 52 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:44:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-04-02 01:44:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2023-04-02 01:44:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 655 states have (on average 1.1450381679389312) internal successors, (750), 707 states have internal predecessors, (750), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2023-04-02 01:44:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 837 transitions. [2023-04-02 01:44:51,699 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 837 transitions. Word has length 54 [2023-04-02 01:44:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:51,700 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 837 transitions. [2023-04-02 01:44:51,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:44:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 837 transitions. [2023-04-02 01:44:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 01:44:51,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:51,707 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:51,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:51,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-04-02 01:44:51,913 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:51,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1144517490, now seen corresponding path program 69 times [2023-04-02 01:44:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:51,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296841745] [2023-04-02 01:44:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:51,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:51,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:44:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296841745] [2023-04-02 01:44:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296841745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569481643] [2023-04-02 01:44:52,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:44:52,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:52,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:52,072 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:52,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-04-02 01:44:52,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:44:52,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:52,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:44:52,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:52,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-02 01:44:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569481643] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:52,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:52,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2023-04-02 01:44:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369872350] [2023-04-02 01:44:52,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 01:44:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 01:44:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:44:52,352 INFO L87 Difference]: Start difference. First operand 742 states and 837 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:53,214 INFO L93 Difference]: Finished difference Result 1298 states and 1460 transitions. [2023-04-02 01:44:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:44:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-04-02 01:44:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:53,225 INFO L225 Difference]: With dead ends: 1298 [2023-04-02 01:44:53,226 INFO L226 Difference]: Without dead ends: 854 [2023-04-02 01:44:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 01:44:53,231 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:53,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 27 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:44:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-04-02 01:44:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 824. [2023-04-02 01:44:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2023-04-02 01:44:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 930 transitions. [2023-04-02 01:44:53,665 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 930 transitions. Word has length 54 [2023-04-02 01:44:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:53,666 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 930 transitions. [2023-04-02 01:44:53,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 930 transitions. [2023-04-02 01:44:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:44:53,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:53,671 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:53,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-04-02 01:44:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:53,871 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:53,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -579740214, now seen corresponding path program 70 times [2023-04-02 01:44:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:53,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296570946] [2023-04-02 01:44:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:53,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:44:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:54,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:54,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296570946] [2023-04-02 01:44:54,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296570946] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:54,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783574740] [2023-04-02 01:44:54,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:44:54,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:54,549 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:54,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-04-02 01:44:54,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:44:54,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:54,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 70 conjunts are in the unsatisfiable core [2023-04-02 01:44:54,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:44:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:54,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:44:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:44:55,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783574740] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:44:55,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:44:55,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 43 [2023-04-02 01:44:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862864195] [2023-04-02 01:44:55,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:44:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:44:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:44:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:44:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:44:55,158 INFO L87 Difference]: Start difference. First operand 824 states and 930 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:44:58,398 INFO L93 Difference]: Finished difference Result 940 states and 1061 transitions. [2023-04-02 01:44:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-02 01:44:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-04-02 01:44:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:44:58,403 INFO L225 Difference]: With dead ends: 940 [2023-04-02 01:44:58,403 INFO L226 Difference]: Without dead ends: 934 [2023-04-02 01:44:58,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=5741, Unknown=0, NotChecked=0, Total=6006 [2023-04-02 01:44:58,408 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 292 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 7059 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:44:58,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 197 Invalid, 7079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7059 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 01:44:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-04-02 01:44:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 840. [2023-04-02 01:44:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 750 states have (on average 1.144) internal successors, (858), 804 states have internal predecessors, (858), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2023-04-02 01:44:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 949 transitions. [2023-04-02 01:44:58,850 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 949 transitions. Word has length 55 [2023-04-02 01:44:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:44:58,850 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 949 transitions. [2023-04-02 01:44:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:44:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 949 transitions. [2023-04-02 01:44:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:44:58,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:44:58,868 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:44:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-04-02 01:44:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:59,068 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:44:59,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:44:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2028236118, now seen corresponding path program 71 times [2023-04-02 01:44:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:44:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120979893] [2023-04-02 01:44:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:44:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:44:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:59,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:44:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:44:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:44:59,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:59,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120979893] [2023-04-02 01:44:59,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120979893] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:59,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929658573] [2023-04-02 01:44:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:44:59,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:59,680 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:59,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-04-02 01:44:59,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-02 01:44:59,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:59,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-02 01:44:59,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:45:00,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:45:00,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929658573] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:00,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:00,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 43 [2023-04-02 01:45:00,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625219115] [2023-04-02 01:45:00,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:00,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:45:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:45:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1709, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:45:00,357 INFO L87 Difference]: Start difference. First operand 840 states and 949 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:03,039 INFO L93 Difference]: Finished difference Result 846 states and 954 transitions. [2023-04-02 01:45:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 01:45:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-04-02 01:45:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:03,042 INFO L225 Difference]: With dead ends: 846 [2023-04-02 01:45:03,042 INFO L226 Difference]: Without dead ends: 824 [2023-04-02 01:45:03,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2023-04-02 01:45:03,047 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 223 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5283 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 5291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:03,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 177 Invalid, 5291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5283 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 01:45:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-04-02 01:45:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2023-04-02 01:45:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 737 states have (on average 1.1438263229308006) internal successors, (843), 789 states have internal predecessors, (843), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2023-04-02 01:45:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 931 transitions. [2023-04-02 01:45:03,504 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 931 transitions. Word has length 55 [2023-04-02 01:45:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:03,504 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 931 transitions. [2023-04-02 01:45:03,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 931 transitions. [2023-04-02 01:45:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:45:03,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:03,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-04-02 01:45:03,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:03,709 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:03,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1858987446, now seen corresponding path program 72 times [2023-04-02 01:45:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183814260] [2023-04-02 01:45:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:03,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:03,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:45:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:45:04,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:04,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183814260] [2023-04-02 01:45:04,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183814260] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:04,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501552806] [2023-04-02 01:45:04,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:45:04,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:04,264 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:04,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-04-02 01:45:04,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:45:04,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:04,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-02 01:45:04,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:45:04,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:45:04,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501552806] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:04,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:04,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 43 [2023-04-02 01:45:04,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92897201] [2023-04-02 01:45:04,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:04,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:45:04,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:45:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:45:04,977 INFO L87 Difference]: Start difference. First operand 824 states and 931 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:07,221 INFO L93 Difference]: Finished difference Result 830 states and 936 transitions. [2023-04-02 01:45:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 01:45:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-04-02 01:45:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:07,225 INFO L225 Difference]: With dead ends: 830 [2023-04-02 01:45:07,225 INFO L226 Difference]: Without dead ends: 806 [2023-04-02 01:45:07,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 01:45:07,229 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 180 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:07,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 177 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4257 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 01:45:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-04-02 01:45:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2023-04-02 01:45:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 722 states have (on average 1.1440443213296398) internal successors, (826), 772 states have internal predecessors, (826), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2023-04-02 01:45:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 911 transitions. [2023-04-02 01:45:07,653 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 911 transitions. Word has length 55 [2023-04-02 01:45:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:07,654 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 911 transitions. [2023-04-02 01:45:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 911 transitions. [2023-04-02 01:45:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:45:07,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:07,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:07,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-04-02 01:45:07,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-04-02 01:45:07,859 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:07,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2070730282, now seen corresponding path program 73 times [2023-04-02 01:45:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:07,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485734624] [2023-04-02 01:45:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:07,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:08,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:45:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:45:08,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:08,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485734624] [2023-04-02 01:45:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485734624] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:08,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436409349] [2023-04-02 01:45:08,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:45:08,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:08,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:08,433 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-04-02 01:45:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:08,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-02 01:45:08,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:45:09,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:45:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436409349] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:09,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:09,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 43 [2023-04-02 01:45:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837959708] [2023-04-02 01:45:09,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:09,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:45:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:45:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:45:09,239 INFO L87 Difference]: Start difference. First operand 806 states and 911 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:11,026 INFO L93 Difference]: Finished difference Result 812 states and 916 transitions. [2023-04-02 01:45:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 01:45:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-04-02 01:45:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:11,029 INFO L225 Difference]: With dead ends: 812 [2023-04-02 01:45:11,029 INFO L226 Difference]: Without dead ends: 786 [2023-04-02 01:45:11,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2023-04-02 01:45:11,034 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 162 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 01:45:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2023-04-02 01:45:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2023-04-02 01:45:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 705 states have (on average 1.1446808510638298) internal successors, (807), 753 states have internal predecessors, (807), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2023-04-02 01:45:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 889 transitions. [2023-04-02 01:45:11,482 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 889 transitions. Word has length 55 [2023-04-02 01:45:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:11,482 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 889 transitions. [2023-04-02 01:45:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 889 transitions. [2023-04-02 01:45:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:45:11,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:11,486 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:11,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-04-02 01:45:11,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:11,687 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:11,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash -827352577, now seen corresponding path program 74 times [2023-04-02 01:45:11,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455345913] [2023-04-02 01:45:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:11,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:45:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 01:45:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455345913] [2023-04-02 01:45:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455345913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311475438] [2023-04-02 01:45:12,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:45:12,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:12,028 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:12,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-04-02 01:45:12,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:45:12,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:12,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:45:12,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 01:45:12,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 01:45:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311475438] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:12,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2023-04-02 01:45:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057620775] [2023-04-02 01:45:12,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 01:45:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 01:45:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 01:45:12,941 INFO L87 Difference]: Start difference. First operand 786 states and 889 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:15,312 INFO L93 Difference]: Finished difference Result 874 states and 995 transitions. [2023-04-02 01:45:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 01:45:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-04-02 01:45:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:15,323 INFO L225 Difference]: With dead ends: 874 [2023-04-02 01:45:15,323 INFO L226 Difference]: Without dead ends: 856 [2023-04-02 01:45:15,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 01:45:15,328 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 459 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:15,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 147 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 01:45:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-04-02 01:45:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 851. [2023-04-02 01:45:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 743 states have (on average 1.135935397039031) internal successors, (844), 809 states have internal predecessors, (844), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2023-04-02 01:45:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 962 transitions. [2023-04-02 01:45:15,749 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 962 transitions. Word has length 55 [2023-04-02 01:45:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 962 transitions. [2023-04-02 01:45:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 962 transitions. [2023-04-02 01:45:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:45:15,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:15,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:15,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-04-02 01:45:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:15,956 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:15,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash -704555318, now seen corresponding path program 75 times [2023-04-02 01:45:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:15,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041304623] [2023-04-02 01:45:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:16,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:45:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:45:16,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041304623] [2023-04-02 01:45:16,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041304623] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:16,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221098109] [2023-04-02 01:45:16,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:45:16,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:16,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:16,424 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:16,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-04-02 01:45:16,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:45:16,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:16,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 01:45:16,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:45:17,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 01:45:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221098109] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:17,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 43 [2023-04-02 01:45:17,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334074063] [2023-04-02 01:45:17,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:17,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 01:45:17,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 01:45:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 01:45:17,207 INFO L87 Difference]: Start difference. First operand 851 states and 962 transitions. Second operand has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:18,795 INFO L93 Difference]: Finished difference Result 869 states and 984 transitions. [2023-04-02 01:45:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 01:45:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-04-02 01:45:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:18,801 INFO L225 Difference]: With dead ends: 869 [2023-04-02 01:45:18,801 INFO L226 Difference]: Without dead ends: 851 [2023-04-02 01:45:18,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=4557, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 01:45:18,806 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:18,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 182 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:45:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2023-04-02 01:45:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2023-04-02 01:45:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 738 states have (on average 1.1382113821138211) internal successors, (840), 804 states have internal predecessors, (840), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2023-04-02 01:45:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 958 transitions. [2023-04-02 01:45:19,227 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 958 transitions. Word has length 55 [2023-04-02 01:45:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:19,228 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 958 transitions. [2023-04-02 01:45:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.375) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:45:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 958 transitions. [2023-04-02 01:45:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 01:45:19,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:19,234 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:19,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-04-02 01:45:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-04-02 01:45:19,435 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:19,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash -77183301, now seen corresponding path program 76 times [2023-04-02 01:45:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95940091] [2023-04-02 01:45:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:19,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-02 01:45:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 01:45:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95940091] [2023-04-02 01:45:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95940091] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690593647] [2023-04-02 01:45:19,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:45:19,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:19,783 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:19,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-04-02 01:45:19,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:45:19,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:19,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:45:19,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 01:45:20,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 01:45:20,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690593647] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:20,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 45 [2023-04-02 01:45:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653114131] [2023-04-02 01:45:20,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 01:45:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 01:45:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 01:45:20,761 INFO L87 Difference]: Start difference. First operand 846 states and 958 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:22,905 INFO L93 Difference]: Finished difference Result 860 states and 971 transitions. [2023-04-02 01:45:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 01:45:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-04-02 01:45:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:22,909 INFO L225 Difference]: With dead ends: 860 [2023-04-02 01:45:22,909 INFO L226 Difference]: Without dead ends: 834 [2023-04-02 01:45:22,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=404, Invalid=4288, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 01:45:22,914 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 489 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:22,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 117 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 01:45:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-04-02 01:45:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2023-04-02 01:45:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 724 states have (on average 1.138121546961326) internal successors, (824), 790 states have internal predecessors, (824), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2023-04-02 01:45:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 934 transitions. [2023-04-02 01:45:23,350 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 934 transitions. Word has length 55 [2023-04-02 01:45:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:23,351 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 934 transitions. [2023-04-02 01:45:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 states have internal predecessors, (70), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 934 transitions. [2023-04-02 01:45:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 01:45:23,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:23,360 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:23,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-04-02 01:45:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:23,565 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:23,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1811549873, now seen corresponding path program 77 times [2023-04-02 01:45:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295266975] [2023-04-02 01:45:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:23,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:45:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295266975] [2023-04-02 01:45:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295266975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233629467] [2023-04-02 01:45:24,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:45:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:24,156 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:24,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-04-02 01:45:24,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-04-02 01:45:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:24,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 01:45:24,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:25,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233629467] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:26,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2023-04-02 01:45:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118888989] [2023-04-02 01:45:26,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:26,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-04-02 01:45:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-04-02 01:45:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 01:45:26,179 INFO L87 Difference]: Start difference. First operand 832 states and 934 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:45:31,952 INFO L93 Difference]: Finished difference Result 948 states and 1071 transitions. [2023-04-02 01:45:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-02 01:45:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2023-04-02 01:45:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:45:31,961 INFO L225 Difference]: With dead ends: 948 [2023-04-02 01:45:31,961 INFO L226 Difference]: Without dead ends: 934 [2023-04-02 01:45:31,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=846, Invalid=12726, Unknown=0, NotChecked=0, Total=13572 [2023-04-02 01:45:31,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 904 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 7842 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 7842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:45:31,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 237 Invalid, 7929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 7842 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 01:45:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-04-02 01:45:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2023-04-02 01:45:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 805 states have (on average 1.1366459627329193) internal successors, (915), 879 states have internal predecessors, (915), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2023-04-02 01:45:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1041 transitions. [2023-04-02 01:45:32,467 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1041 transitions. Word has length 56 [2023-04-02 01:45:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:45:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1041 transitions. [2023-04-02 01:45:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:45:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1041 transitions. [2023-04-02 01:45:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 01:45:32,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:45:32,474 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:45:32,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-04-02 01:45:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:32,675 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:45:32,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:45:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -120213876, now seen corresponding path program 78 times [2023-04-02 01:45:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:45:32,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240078146] [2023-04-02 01:45:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:45:32,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:45:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:45:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-02 01:45:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:32,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-02 01:45:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:45:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:33,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:45:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240078146] [2023-04-02 01:45:33,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240078146] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:45:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848052488] [2023-04-02 01:45:33,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:45:33,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:45:33,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:45:33,241 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:45:33,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-04-02 01:45:33,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-02 01:45:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:45:33,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 01:45:33,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:34,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:45:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:45:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848052488] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:45:35,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:45:35,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 73 [2023-04-02 01:45:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585506569] [2023-04-02 01:45:35,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:45:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-04-02 01:45:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:45:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-04-02 01:45:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5013, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 01:45:35,326 INFO L87 Difference]: Start difference. First operand 925 states and 1041 transitions. Second operand has 73 states, 73 states have (on average 1.452054794520548) internal successors, (106), 72 states have internal predecessors, (106), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)