/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/nla-digbench-scaling/hard2_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:26:04,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:26:04,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:26:04,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 02:26:04,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:26:04,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:26:04,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:26:04,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:26:04,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:26:04,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:26:04,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:26:04,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:26:04,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:26:04,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:26:04,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:26:04,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:26:04,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:26:04,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:26:04,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:26:04,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:26:04,079 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 02:26:04,098 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:26:04,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:26:04,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:26:04,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:26:04,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:26:04,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:26:04,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:26:04,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:26:04,101 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:26:04,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:26:04,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:26:04,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:26:04,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:26:04,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:26:04,104 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:26:04,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:26:04,104 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:26:04,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:26:04,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:26:04,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:26:04,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:26:04,311 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:26:04,311 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:26:04,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2023-04-02 02:26:05,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:26:05,521 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:26:05,521 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound20.c [2023-04-02 02:26:05,525 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20af79a6a/ab5b951738f54a1b968b392a08c1741e/FLAGbd8d6c7ae [2023-04-02 02:26:05,540 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20af79a6a/ab5b951738f54a1b968b392a08c1741e [2023-04-02 02:26:05,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:26:05,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:26:05,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:26:05,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:26:05,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:26:05,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d9c1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05, skipping insertion in model container [2023-04-02 02:26:05,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:26:05,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:26:05,687 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/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2023-04-02 02:26:05,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:26:05,704 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:26:05,718 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/nla-digbench-scaling/hard2_valuebound20.c[526,539] [2023-04-02 02:26:05,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:26:05,734 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:26:05,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05 WrapperNode [2023-04-02 02:26:05,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:26:05,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:26:05,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:26:05,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:26:05,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,758 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:26:05,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:26:05,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:26:05,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:26:05,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (1/1) ... [2023-04-02 02:26:05,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:26:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:05,788 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 02:26:05,792 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 02:26:05,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:26:05,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:26:05,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:26:05,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:26:05,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:26:05,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:26:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:26:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:26:05,859 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:26:05,861 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:26:05,957 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:26:05,961 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:26:05,961 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:26:05,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:26:05 BoogieIcfgContainer [2023-04-02 02:26:05,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:26:05,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:26:05,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:26:05,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:26:05,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:26:05" (1/3) ... [2023-04-02 02:26:05,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7e64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:26:05, skipping insertion in model container [2023-04-02 02:26:05,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:05" (2/3) ... [2023-04-02 02:26:05,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7e64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:26:05, skipping insertion in model container [2023-04-02 02:26:05,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:26:05" (3/3) ... [2023-04-02 02:26:05,968 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2023-04-02 02:26:05,979 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:26:05,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:26:06,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:26:06,023 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;@1e30e240, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:26:06,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:26:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:26:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 02:26:06,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:06,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:06,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:06,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2023-04-02 02:26:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992461041] [2023-04-02 02:26:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:06,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:26:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:26:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,210 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 02:26:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992461041] [2023-04-02 02:26:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992461041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:26:06,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:26:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 02:26:06,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936525067] [2023-04-02 02:26:06,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:26:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 02:26:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 02:26:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:26:06,257 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:26:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:06,375 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2023-04-02 02:26:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 02:26:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-02 02:26:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:06,381 INFO L225 Difference]: With dead ends: 61 [2023-04-02 02:26:06,382 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 02:26:06,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:26:06,388 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:06,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:26:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 02:26:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 02:26:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:26:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-02 02:26:06,463 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2023-04-02 02:26:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:06,463 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-02 02:26:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:26:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-02 02:26:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 02:26:06,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:06,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 02:26:06,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:06,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2023-04-02 02:26:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278216461] [2023-04-02 02:26:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:26:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:26:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,642 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 02:26:06,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:06,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278216461] [2023-04-02 02:26:06,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278216461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:26:06,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:26:06,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:26:06,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750052759] [2023-04-02 02:26:06,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:26:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:26:06,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:26:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:26:06,644 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:26:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:06,801 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-04-02 02:26:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:26:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-02 02:26:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:06,803 INFO L225 Difference]: With dead ends: 43 [2023-04-02 02:26:06,803 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 02:26:06,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:26:06,808 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:06,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 22 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:26:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 02:26:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-04-02 02:26:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:26:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-04-02 02:26:06,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2023-04-02 02:26:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:06,817 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-04-02 02:26:06,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:26:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-04-02 02:26:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 02:26:06,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:06,818 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] [2023-04-02 02:26:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 02:26:06,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:06,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2023-04-02 02:26:06,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:06,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132767534] [2023-04-02 02:26:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 02:26:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 02:26:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-02 02:26:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:26:06,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:06,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132767534] [2023-04-02 02:26:06,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132767534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:26:06,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:26:06,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:26:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564940838] [2023-04-02 02:26:06,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:26:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:26:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:26:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:26:06,880 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:26:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:06,990 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-04-02 02:26:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:26:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-04-02 02:26:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:06,992 INFO L225 Difference]: With dead ends: 47 [2023-04-02 02:26:06,992 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 02:26:06,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:26:06,993 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:06,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 22 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:26:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 02:26:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-04-02 02:26:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:26:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-04-02 02:26:06,999 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2023-04-02 02:26:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:06,999 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-04-02 02:26:06,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:26:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-04-02 02:26:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 02:26:07,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:07,000 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:07,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 02:26:07,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:07,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2023-04-02 02:26:07,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:07,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458471268] [2023-04-02 02:26:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:07,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:07,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:07,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867955838] [2023-04-02 02:26:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:07,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:07,011 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 02:26:07,054 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 02:26:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:07,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 02:26:07,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:26:07,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:26:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458471268] [2023-04-02 02:26:07,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867955838] [2023-04-02 02:26:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867955838] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:07,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-04-02 02:26:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102513966] [2023-04-02 02:26:07,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:26:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:26:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:26:07,270 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:26:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:07,391 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2023-04-02 02:26:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:26:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-04-02 02:26:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:07,393 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:26:07,393 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 02:26:07,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:26:07,394 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:07,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 114 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:26:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 02:26:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-04-02 02:26:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 02:26:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-04-02 02:26:07,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 27 [2023-04-02 02:26:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:07,405 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-04-02 02:26:07,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 02:26:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-04-02 02:26:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 02:26:07,406 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:07,406 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 02:26:07,414 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 02:26:07,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:07,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:07,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2023-04-02 02:26:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852696145] [2023-04-02 02:26:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:07,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:07,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995184552] [2023-04-02 02:26:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:07,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:07,629 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 02:26:07,634 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 02:26:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:07,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:26:07,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:26:07,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 02:26:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852696145] [2023-04-02 02:26:07,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995184552] [2023-04-02 02:26:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995184552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:07,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-02 02:26:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036598316] [2023-04-02 02:26:07,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 02:26:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 02:26:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:26:07,962 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:26:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:08,033 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2023-04-02 02:26:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:26:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 34 [2023-04-02 02:26:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:08,035 INFO L225 Difference]: With dead ends: 74 [2023-04-02 02:26:08,035 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 02:26:08,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:26:08,036 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:08,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 76 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:26:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 02:26:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-04-02 02:26:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 42 states have internal predecessors, (44), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 02:26:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2023-04-02 02:26:08,045 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 34 [2023-04-02 02:26:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:08,045 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2023-04-02 02:26:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 02:26:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2023-04-02 02:26:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 02:26:08,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:08,047 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:08,069 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 02:26:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:08,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:08,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2023-04-02 02:26:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292896782] [2023-04-02 02:26:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:08,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124976413] [2023-04-02 02:26:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:08,281 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 02:26:08,286 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 02:26:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:08,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 02:26:08,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 02:26:08,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 02:26:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292896782] [2023-04-02 02:26:09,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124976413] [2023-04-02 02:26:09,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124976413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:09,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:09,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-02 02:26:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89004547] [2023-04-02 02:26:09,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 02:26:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 02:26:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:26:09,163 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 02:26:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:11,471 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2023-04-02 02:26:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:26:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 64 [2023-04-02 02:26:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:11,472 INFO L225 Difference]: With dead ends: 150 [2023-04-02 02:26:11,473 INFO L226 Difference]: Without dead ends: 119 [2023-04-02 02:26:11,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-04-02 02:26:11,474 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:11,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 121 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 02:26:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-02 02:26:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2023-04-02 02:26:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 74 states have internal predecessors, (80), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 02:26:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2023-04-02 02:26:11,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 64 [2023-04-02 02:26:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:11,526 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2023-04-02 02:26:11,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 02:26:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2023-04-02 02:26:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 02:26:11,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:11,528 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:11,537 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 02:26:11,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:11,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:11,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2023-04-02 02:26:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340270462] [2023-04-02 02:26:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:11,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:11,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669975246] [2023-04-02 02:26:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:11,742 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 02:26:11,744 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 02:26:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:11,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 02:26:11,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-02 02:26:11,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-02 02:26:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340270462] [2023-04-02 02:26:12,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:12,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669975246] [2023-04-02 02:26:12,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669975246] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:12,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:12,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-04-02 02:26:12,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515917081] [2023-04-02 02:26:12,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:12,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 02:26:12,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 02:26:12,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:26:12,459 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-04-02 02:26:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:12,914 INFO L93 Difference]: Finished difference Result 169 states and 218 transitions. [2023-04-02 02:26:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 02:26:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 75 [2023-04-02 02:26:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:12,916 INFO L225 Difference]: With dead ends: 169 [2023-04-02 02:26:12,916 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 02:26:12,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:26:12,917 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:12,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 166 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:26:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 02:26:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2023-04-02 02:26:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 69 states have internal predecessors, (75), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-02 02:26:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2023-04-02 02:26:12,966 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 75 [2023-04-02 02:26:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:12,968 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2023-04-02 02:26:12,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-04-02 02:26:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2023-04-02 02:26:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 02:26:12,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:12,971 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:12,987 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 02:26:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:13,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:13,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash -306274169, now seen corresponding path program 1 times [2023-04-02 02:26:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:13,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955321350] [2023-04-02 02:26:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:13,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624316479] [2023-04-02 02:26:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:13,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:13,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:13,195 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 02:26:13,196 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 02:26:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:26:13,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 02:26:13,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 02:26:13,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 02:26:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955321350] [2023-04-02 02:26:13,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624316479] [2023-04-02 02:26:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624316479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:13,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:13,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 02:26:13,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580214351] [2023-04-02 02:26:13,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:13,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:26:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:26:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:26:13,582 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-04-02 02:26:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:26:13,774 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2023-04-02 02:26:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:26:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 80 [2023-04-02 02:26:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:26:13,776 INFO L225 Difference]: With dead ends: 128 [2023-04-02 02:26:13,776 INFO L226 Difference]: Without dead ends: 101 [2023-04-02 02:26:13,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:26:13,777 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:26:13,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 223 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:26:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-02 02:26:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-04-02 02:26:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 64 states have internal predecessors, (68), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-02 02:26:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2023-04-02 02:26:13,796 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 80 [2023-04-02 02:26:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:26:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2023-04-02 02:26:13,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-04-02 02:26:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2023-04-02 02:26:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-02 02:26:13,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:26:13,797 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:26:13,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 02:26:14,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:14,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:26:14,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:26:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 2 times [2023-04-02 02:26:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:26:14,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087642855] [2023-04-02 02:26:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:26:14,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:26:14,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:26:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496690250] [2023-04-02 02:26:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:26:14,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:26:14,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:26:14,021 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 02:26:14,050 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 02:26:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:26:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:26:14,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 02:26:14,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:26:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:26:14,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:26:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-02 02:26:41,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:26:41,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087642855] [2023-04-02 02:26:41,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:26:41,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496690250] [2023-04-02 02:26:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496690250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:26:41,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:26:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-04-02 02:26:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345368709] [2023-04-02 02:26:41,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:26:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:26:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:26:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:26:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=334, Unknown=4, NotChecked=0, Total=420 [2023-04-02 02:26:41,024 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-04-02 02:26:58,604 WARN L223 SmtUtils]: Spent 17.01s on a formula simplification. DAG size of input: 172 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:27:04,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:27:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:05,462 INFO L93 Difference]: Finished difference Result 210 states and 275 transitions. [2023-04-02 02:27:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 02:27:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 94 [2023-04-02 02:27:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:05,464 INFO L225 Difference]: With dead ends: 210 [2023-04-02 02:27:05,464 INFO L226 Difference]: Without dead ends: 165 [2023-04-02 02:27:05,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=151, Invalid=547, Unknown=4, NotChecked=0, Total=702 [2023-04-02 02:27:05,465 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 81 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:05,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 293 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-02 02:27:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-02 02:27:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2023-04-02 02:27:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 104 states have internal predecessors, (112), 48 states have call successors, (48), 17 states have call predecessors, (48), 16 states have return successors, (46), 39 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 02:27:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2023-04-02 02:27:05,509 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 94 [2023-04-02 02:27:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:05,510 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2023-04-02 02:27:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2023-04-02 02:27:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2023-04-02 02:27:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 02:27:05,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:27:05,511 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:27:05,521 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 02:27:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:05,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:27:05,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:27:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 2 times [2023-04-02 02:27:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:27:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488515726] [2023-04-02 02:27:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:27:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:27:05,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:27:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105953570] [2023-04-02 02:27:05,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:27:05,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:05,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:27:05,749 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 02:27:05,750 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 02:27:05,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:27:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:27:05,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 02:27:05,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:27:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-02 02:27:06,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:27:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-02 02:27:12,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:27:12,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488515726] [2023-04-02 02:27:12,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:27:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105953570] [2023-04-02 02:27:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105953570] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:27:12,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:27:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-04-02 02:27:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027619360] [2023-04-02 02:27:12,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:27:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:27:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:27:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:27:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:27:12,443 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 13 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-04-02 02:27:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:18,781 INFO L93 Difference]: Finished difference Result 246 states and 327 transitions. [2023-04-02 02:27:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 02:27:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 13 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) Word has length 105 [2023-04-02 02:27:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:18,783 INFO L225 Difference]: With dead ends: 246 [2023-04-02 02:27:18,783 INFO L226 Difference]: Without dead ends: 201 [2023-04-02 02:27:18,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:27:18,784 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:18,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 219 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 02:27:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-02 02:27:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2023-04-02 02:27:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 56 states have call successors, (56), 18 states have call predecessors, (56), 17 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-04-02 02:27:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 235 transitions. [2023-04-02 02:27:18,874 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 235 transitions. Word has length 105 [2023-04-02 02:27:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:18,875 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 235 transitions. [2023-04-02 02:27:18,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 13 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-04-02 02:27:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 235 transitions. [2023-04-02 02:27:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 02:27:18,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:27:18,876 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:27:18,881 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 02:27:19,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:19,081 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:27:19,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:27:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1319164935, now seen corresponding path program 2 times [2023-04-02 02:27:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:27:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650458556] [2023-04-02 02:27:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:27:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:27:19,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:27:19,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505123219] [2023-04-02 02:27:19,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:27:19,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:19,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:27:19,097 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 02:27:19,098 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 02:27:19,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:27:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:27:19,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-02 02:27:19,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:27:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-02 02:27:19,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:27:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-02 02:27:21,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:27:21,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650458556] [2023-04-02 02:27:21,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:27:21,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505123219] [2023-04-02 02:27:21,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505123219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:27:21,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:27:21,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-04-02 02:27:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434223197] [2023-04-02 02:27:21,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:27:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 02:27:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:27:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 02:27:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-04-02 02:27:21,132 INFO L87 Difference]: Start difference. First operand 181 states and 235 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 23 states have internal predecessors, (49), 15 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2023-04-02 02:27:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:21,890 INFO L93 Difference]: Finished difference Result 245 states and 310 transitions. [2023-04-02 02:27:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 02:27:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 23 states have internal predecessors, (49), 15 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) Word has length 110 [2023-04-02 02:27:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:21,892 INFO L225 Difference]: With dead ends: 245 [2023-04-02 02:27:21,892 INFO L226 Difference]: Without dead ends: 162 [2023-04-02 02:27:21,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 02:27:21,893 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:21,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 338 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:27:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-04-02 02:27:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-04-02 02:27:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 99 states have internal predecessors, (106), 43 states have call successors, (43), 19 states have call predecessors, (43), 18 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2023-04-02 02:27:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2023-04-02 02:27:21,956 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 110 [2023-04-02 02:27:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:21,956 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2023-04-02 02:27:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 23 states have internal predecessors, (49), 15 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2023-04-02 02:27:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2023-04-02 02:27:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 02:27:21,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:27:21,957 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:27:21,972 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 02:27:22,162 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,SelfDestructingSolverStorable10 [2023-04-02 02:27:22,162 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:27:22,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:27:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 3 times [2023-04-02 02:27:22,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:27:22,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152537824] [2023-04-02 02:27:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:27:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:27:22,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:27:22,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422063351] [2023-04-02 02:27:22,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:27:22,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:27:22,170 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 02:27:22,197 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 02:27:22,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:27:22,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:27:22,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 02:27:22,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:27:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 156 proven. 44 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2023-04-02 02:27:22,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:27:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:27:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152537824] [2023-04-02 02:27:25,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:27:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422063351] [2023-04-02 02:27:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422063351] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:27:25,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:27:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 02:27:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275042349] [2023-04-02 02:27:25,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:27:25,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:27:25,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:27:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:27:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:27:25,674 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-02 02:27:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:25,840 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2023-04-02 02:27:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:27:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 124 [2023-04-02 02:27:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:25,843 INFO L225 Difference]: With dead ends: 167 [2023-04-02 02:27:25,843 INFO L226 Difference]: Without dead ends: 165 [2023-04-02 02:27:25,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:27:25,843 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:25,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:27:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-02 02:27:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-04-02 02:27:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 102 states have internal predecessors, (109), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2023-04-02 02:27:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 193 transitions. [2023-04-02 02:27:25,911 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 193 transitions. Word has length 124 [2023-04-02 02:27:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:25,911 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 193 transitions. [2023-04-02 02:27:25,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-02 02:27:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 193 transitions. [2023-04-02 02:27:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 02:27:25,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:27:25,914 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2023-04-02 02:27:25,926 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 02:27:26,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:26,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:27:26,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:27:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1341863176, now seen corresponding path program 3 times [2023-04-02 02:27:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:27:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154793316] [2023-04-02 02:27:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:27:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:27:26,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:27:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517119073] [2023-04-02 02:27:26,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:27:26,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:27:26,128 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 02:27:26,149 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 02:27:26,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:27:26,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:27:26,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 02:27:26,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:27:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 107 proven. 52 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-04-02 02:27:26,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:27:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2023-04-02 02:27:26,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:27:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154793316] [2023-04-02 02:27:26,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:27:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517119073] [2023-04-02 02:27:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517119073] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:27:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:27:26,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-04-02 02:27:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183804051] [2023-04-02 02:27:26,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:27:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:27:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:27:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:27:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:27:26,417 INFO L87 Difference]: Start difference. First operand 159 states and 193 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:27:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:26,620 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2023-04-02 02:27:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:27:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 127 [2023-04-02 02:27:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:26,621 INFO L225 Difference]: With dead ends: 179 [2023-04-02 02:27:26,621 INFO L226 Difference]: Without dead ends: 163 [2023-04-02 02:27:26,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-04-02 02:27:26,622 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:27:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-04-02 02:27:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-04-02 02:27:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 101 states have (on average 1.099009900990099) internal successors, (111), 105 states have internal predecessors, (111), 41 states have call successors, (41), 22 states have call predecessors, (41), 20 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2023-04-02 02:27:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2023-04-02 02:27:26,691 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 127 [2023-04-02 02:27:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:26,693 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2023-04-02 02:27:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:27:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2023-04-02 02:27:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-02 02:27:26,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:27:26,694 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:27:26,703 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 02:27:26,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:27:26,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:27:26,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:27:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 3 times [2023-04-02 02:27:26,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:27:26,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693274173] [2023-04-02 02:27:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:27:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:27:26,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:27:26,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21238265] [2023-04-02 02:27:26,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:27:26,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:27:26,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:27:26,913 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 02:27:26,915 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 02:27:26,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:27:26,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:27:26,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 02:27:26,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:27:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-04-02 02:27:27,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:27:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-04-02 02:27:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:27:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693274173] [2023-04-02 02:27:27,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:27:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21238265] [2023-04-02 02:27:27,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21238265] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:27:27,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:27:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-02 02:27:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403949835] [2023-04-02 02:27:27,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:27:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 02:27:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:27:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 02:27:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:27:27,224 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:27:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:27:27,465 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2023-04-02 02:27:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:27:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 135 [2023-04-02 02:27:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:27:27,466 INFO L225 Difference]: With dead ends: 163 [2023-04-02 02:27:27,466 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 02:27:27,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:27:27,467 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:27:27,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 128 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:27:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 02:27:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 02:27:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 02:27:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 02:27:27,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2023-04-02 02:27:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:27:27,468 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 02:27:27,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 02:27:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 02:27:27,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 02:27:27,470 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 02:27:27,484 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 02:27:27,675 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,SelfDestructingSolverStorable13 [2023-04-02 02:27:27,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 8) no Hoare annotation was computed. [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2023-04-02 02:27:33,387 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-04-02 02:27:33,387 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (let ((.cse0 (* main_~B~0 main_~q~0))) (and (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse0 main_~r~0)) (= (+ .cse0 main_~r~0) main_~A~0) (= main_~B~0 main_~d~0))) (and (= main_~d~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~p~0 1))) [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ main_~q~0 main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3)))) [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 22 61) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (* main_~B~0 main_~q~0))) (and (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse0 main_~r~0)) (= (+ .cse0 main_~r~0) main_~A~0) (= main_~B~0 main_~d~0))) [2023-04-02 02:27:33,388 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 22 61) the Hoare annotation is: true [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (= (+ main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3))) (= main_~q~0 0) (= main_~B~0 1) (= (+ main_~p~0 main_~r~0 (div main_~p~0 2)) (+ main_~A~0 main_~d~0 (div main_~d~0 2)))) [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (and (= (+ main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3))) (= main_~q~0 0) (= main_~B~0 1) (= (+ main_~p~0 main_~r~0 (div main_~p~0 2)) (+ main_~A~0 main_~d~0 (div main_~d~0 2)))) [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L902 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2023-04-02 02:27:33,388 INFO L899 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ main_~q~0 main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3)))) [2023-04-02 02:27:33,388 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ main_~q~0 main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3)))) [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (= (+ main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3))) (= main_~q~0 0) (= main_~B~0 1) (= (+ main_~p~0 main_~r~0 (div main_~p~0 2)) (+ main_~A~0 main_~d~0 (div main_~d~0 2)))) [2023-04-02 02:27:33,389 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (and (= (+ main_~r~0 (* main_~p~0 3)) (+ main_~A~0 (* main_~d~0 3))) (= main_~q~0 0) (= main_~B~0 1) (= (+ main_~p~0 main_~r~0 (div main_~p~0 2)) (+ main_~A~0 main_~d~0 (div main_~d~0 2)))) [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-04-02 02:27:33,389 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-04-02 02:27:33,389 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-04-02 02:27:33,391 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 1, 1, 1, 1, 1] [2023-04-02 02:27:33,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 02:27:33,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 02:27:33 BoogieIcfgContainer [2023-04-02 02:27:33,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 02:27:33,402 INFO L158 Benchmark]: Toolchain (without parser) took 87859.25ms. Allocated memory was 308.3MB in the beginning and 601.9MB in the end (delta: 293.6MB). Free memory was 254.7MB in the beginning and 212.4MB in the end (delta: 42.3MB). Peak memory consumption was 341.6MB. Max. memory is 8.0GB. [2023-04-02 02:27:33,402 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 217.1MB. Free memory is still 168.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 02:27:33,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.02ms. Allocated memory is still 308.3MB. Free memory was 254.3MB in the beginning and 243.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 02:27:33,404 INFO L158 Benchmark]: Boogie Preprocessor took 24.63ms. Allocated memory is still 308.3MB. Free memory was 243.8MB in the beginning and 242.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 02:27:33,404 INFO L158 Benchmark]: RCFGBuilder took 202.35ms. Allocated memory is still 308.3MB. Free memory was 242.1MB in the beginning and 230.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 02:27:33,404 INFO L158 Benchmark]: TraceAbstraction took 87437.40ms. Allocated memory was 308.3MB in the beginning and 601.9MB in the end (delta: 293.6MB). Free memory was 229.5MB in the beginning and 212.4MB in the end (delta: 17.1MB). Peak memory consumption was 316.4MB. Max. memory is 8.0GB. [2023-04-02 02:27:33,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 217.1MB. Free memory is still 168.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.02ms. Allocated memory is still 308.3MB. Free memory was 254.3MB in the beginning and 243.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.63ms. Allocated memory is still 308.3MB. Free memory was 243.8MB in the beginning and 242.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 202.35ms. Allocated memory is still 308.3MB. Free memory was 242.1MB in the beginning and 230.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 87437.40ms. Allocated memory was 308.3MB in the beginning and 601.9MB in the end (delta: 293.6MB). Free memory was 229.5MB in the beginning and 212.4MB in the end (delta: 17.1MB). Peak memory consumption was 316.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87.4s, OverallIterations: 14, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 35.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 581 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 525 mSDsluCounter, 2018 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1641 mSDsCounter, 615 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3712 IncrementalHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 615 mSolverCounterUnsat, 377 mSDtfsCounter, 3712 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1914 GetRequests, 1688 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 39.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=181occurred in iteration=10, InterpolantAutomatonStates: 147, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 79 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 159 PreInvPairs, 262 NumberOfFragments, 254 HoareAnnotationTreeSize, 159 FomulaSimplifications, 197019 FormulaSimplificationTreeSizeReduction, 3.9s HoareSimplificationTime, 16 FomulaSimplificationsInter, 9869 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 42.1s InterpolantComputationTime, 1031 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1858 ConstructedInterpolants, 0 QuantifiedInterpolants, 20403 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2134 ConjunctsInSsa, 341 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 7226/7947 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (d == p && B == 1) && q + r + p * 3 == A + d * 3 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((r + p * 3 == A + d * 3 && q == 0) && B == 1) && p + r + p / 2 == A + d + d / 2 RESULT: Ultimate proved your program to be correct! [2023-04-02 02:27:33,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...